JP2003343623A - Manufacturing method of sliding member - Google Patents
Manufacturing method of sliding memberInfo
- Publication number
- JP2003343623A JP2003343623A JP2003020260A JP2003020260A JP2003343623A JP 2003343623 A JP2003343623 A JP 2003343623A JP 2003020260 A JP2003020260 A JP 2003020260A JP 2003020260 A JP2003020260 A JP 2003020260A JP 2003343623 A JP2003343623 A JP 2003343623A
- Authority
- JP
- Japan
- Prior art keywords
- composite material
- carbon fiber
- fine particles
- sliding
- fiber reinforced
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、摩擦係数が高く、
耐摩耗性にも優れた、炭素繊維強化炭素複合材からなる
摺動材の製造方法に関する。TECHNICAL FIELD The present invention has a high coefficient of friction,
The present invention relates to a method for producing a sliding material made of a carbon fiber reinforced carbon composite material which is also excellent in wear resistance.
【０００２】[0002]
【従来の技術】炭素繊維強化炭素複合材（以下、Ｃ／Ｃ
複合材と言うことがある）は、通常、炭素繊維集合物に
樹脂を含浸又は混合して加熱成形したもの、あるいは炭
素繊維構造物（炭素繊維プリフォーム）を非酸化雰囲気
中で焼成し、緻密化、更に、必要に応じて黒鉛化処理す
ることにより製造される。かかるＣ／Ｃ複合材は、比強
度が大きく、軽量、かつ高温での使用に耐え得る材料と
して、従来から摺動部材用、駆動継ぎ手用、制動機構用
等の材料として使用されており、特に、航空機、一般車
輌、レース車輌のブレーキ、クラッチ等の摺動材として
注目されている。2. Description of the Related Art Carbon fiber reinforced carbon composite materials (hereinafter C / C
A composite material may be referred to as a composite material, which is usually obtained by impregnating or mixing a carbon fiber aggregate with a resin and then heat-molding it, or by firing a carbon fiber structure (carbon fiber preform) in a non-oxidizing atmosphere to obtain a dense structure. It is produced by subjecting the polymer to a graphitization treatment and, if necessary, a graphitization treatment. Such a C / C composite material has a large specific strength, is lightweight, and has been conventionally used as a material for sliding members, drive joints, braking mechanisms, etc., as a material that can withstand use at high temperatures. It is attracting attention as a sliding material for brakes, clutches, etc. of aircraft, general vehicles and racing vehicles.
【０００３】Ｃ／Ｃ複合材を摺動材として使用する場
合、高温高圧の高負荷条件下で使用されるため、その摩
擦係数及び耐摩耗性を向上させるための改良方法が種々
提案されている。その中で、Ｃ／Ｃ複合材の表面に、Ｃ
ＶＤ法等の気相成長法や、塗布法、含浸法などによって
ＳｉＣ層を被覆する方法が多数提案されている。しかし
ながら、この方法による摺動材では、耐摩耗性が改善さ
れるが、摩擦係数が低くなる傾向がある。また、嵩密度
が高くて軽量化に支障をきたすうえ、製造コストが高く
なりがちである。When a C / C composite material is used as a sliding material, it is used under high temperature, high pressure and high load conditions. Therefore, various improvement methods have been proposed for improving its friction coefficient and wear resistance. . Among them, on the surface of C / C composite material, C
A large number of methods have been proposed for coating the SiC layer by vapor phase growth methods such as the VD method, coating methods, and impregnation methods. However, although the sliding material produced by this method has improved wear resistance, it tends to have a low coefficient of friction. Further, the bulk density is high, which hinders weight reduction and tends to increase the manufacturing cost.
【０００４】一方、炭素繊維プリフォームに、ヌープ硬
度３００ｋｇ／ｍｍ2以上の無機物質の微粒子を添加し
た後、成形し、焼成緻密化する方法により、耐摩耗性に
優れた摺動材が得られることが知られている（特開平７
−１０１７８３号）。しかしながら、この方法で得られ
る摺動材では、耐摩耗性の向上は認められるものの、摩
擦係数の向上が十分ではない。On the other hand, by adding fine particles of an inorganic substance having a Knoop hardness of 300 kg / mm 2 or more to a carbon fiber preform, followed by molding and densification by firing, a sliding material having excellent wear resistance can be obtained. It is known (Japanese Patent Application Laid-Open No. H7-7
-101783). However, in the sliding material obtained by this method, although the abrasion resistance is improved, the friction coefficient is not sufficiently improved.
【０００５】[0005]
【発明が解決しようとする課題】Ｃ／Ｃ複合材をブレー
キやクラッチ等の摺動材として使用する場合、特にレー
ス車両用ブレーキ材やクラッチ材として使用する場合
は、短時間の減速や摺動面積を少なくするために高摩擦
係数の摺動材が望まれる。また、高負荷の摺動時には、
摺動材が高温となりフェードによる摩擦係数の低下が問
題である。そこで、本発明が解決しようとする課題は、
軽量で耐摩耗性に優れ、高負荷でも摩擦係数の高いＣ／
Ｃ複合材からなる摺動材を提供することにある。When a C / C composite material is used as a sliding material for a brake, a clutch, etc., particularly when it is used as a brake material or a clutch material for a race vehicle, deceleration and sliding for a short time. A sliding material having a high friction coefficient is desired to reduce the area. Also, when sliding under high load,
The problem is that the sliding material becomes hot and the friction coefficient decreases due to fading. Therefore, the problem to be solved by the present invention is
Lightweight and excellent in wear resistance, C / with high friction coefficient even under high load
It is to provide a sliding material made of a C composite material.
【０００６】[0006]
【発明が解決しようとする課題】Ｃ／Ｃ複合材をブレー
キやクラッチ等の摺動材として使用する場合、特にレー
ス車両用ブレーキ材やクラッチ材として使用する場合
は、短時間の減速や摺動面積を少なくするために高摩擦
係数の摺動材が望まれる。また、高負荷の摺動時には、
摺動材が高温となりフェードによる摩擦係数の低下が問
題である。そこで、本発明が解決しようとする課題は、
軽量で耐摩耗性に優れ、高負荷でも摩擦係数の高いＣ／
Ｃ複合材からなる摺動材を提供することにある。When a C / C composite material is used as a sliding material for a brake, a clutch, etc., particularly when it is used as a brake material or a clutch material for a race vehicle, deceleration and sliding for a short time. A sliding material having a high friction coefficient is desired to reduce the area. Also, when sliding under high load,
The problem is that the sliding material becomes hot and the friction coefficient decreases due to fading. Therefore, the problem to be solved by the present invention is
Lightweight and excellent in wear resistance, C / with high friction coefficient even under high load
It is to provide a sliding material made of a C composite material.
【０００７】[0007]
【課題を解決するための手段】本発明は、上記の課題を
解決するために鋭意検討を重ねた結果達成されたもので
あって、その要旨は、炭素繊維強化炭素複合材の表面近
傍に、４族から６族元素の単体又はその炭化物、窒化
物、酸化物からなる微粒子を担持させることを特徴とす
る摺動材の製造方法に存する。Means for Solving the Problems The present invention has been achieved as a result of intensive studies for solving the above problems, and the gist thereof is to provide a carbon fiber reinforced carbon composite material in the vicinity of the surface thereof. The present invention resides in a method for producing a sliding material, which is characterized in that fine particles composed of a simple substance of Group 4 to Group 6 elements or their carbides, nitrides, and oxides are carried.
【０００８】[0008]
【発明の実施形態】以下、本発明を詳細に説明する。本
発明はＣ／Ｃ複合材に特定の無機物質の微粒子を添加し
てなる摺動材の製造方法である。ここでのＣ／Ｃ複合材
自体は、特定の微粒子を添加する点を除き、一般に公知
の方法で製造されるものであり、その種類においても特
に制限はない。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below. The present invention is a method for producing a sliding material, which comprises adding fine particles of a specific inorganic substance to a C / C composite material. The C / C composite material itself is manufactured by a generally known method except that specific fine particles are added, and the kind thereof is not particularly limited.
【０００９】例えば、Ｃ／Ｃ複合材の原料の炭素繊維と
しては、ピッチ系、ＰＡＮ系のいずれも使用することが
できる。炭素繊維のプリフォームの形態は、一次元配向
プリフォーム、平織り、朱子織り、織布等の２次元織布
積層プリフォーム、二次元ランダムに配向した二次元不
織布プリフォーム、三次元配向プリフォーム、フェル
ト、トウ等、種々のプリフォームを用いることができ
る。これらのプリフォームを緻密化・熱処理することに
より、Ｃ／Ｃ複合材は製造されるが、緻密化マトリック
スとしては、樹脂や、ピッチ、ＣＶＤ炭素等が使用で
き、これらの一種類または複数の種類の緻密化マトリッ
クスを組み合わせて使用することができる。For example, as the carbon fiber as a raw material of the C / C composite material, either pitch type or PAN type can be used. The form of the carbon fiber preform includes a one-dimensional oriented preform, a two-dimensional woven laminated preform such as a plain weave, a satin weave, and a woven fabric, a two-dimensional randomly oriented two-dimensional nonwoven fabric preform, a three-dimensional oriented preform, Various preforms such as felt and tow can be used. A C / C composite material is manufactured by densifying and heat-treating these preforms. As a densification matrix, resin, pitch, CVD carbon, etc. can be used. Can be used in combination.
【００１０】緻密化マトリックスとして使用する樹脂と
しては、フェノール樹脂、フラン樹脂、エポキシ樹脂な
どが挙げられるが、特に炭化歩留まりの高いフェノール
樹脂が好ましい。また、緻密化マトリックスとしてピッ
チ及びＣＶＤ炭素を使用する場合、その等方性、異方性
の種類は問わない。通常、緻密化の途中ないし最終まで
の段階で、通常１０００℃以上、好ましくは１３００℃
以上で、通常３０００℃以下、好ましくは２４００℃以
下の条件下で、温度で熱処理することによりＣ／Ｃ複合
材が製造される。かかるＣ／Ｃ複合材の嵩密度は通常
１．５〜２．２ｇ／ｃｍ3、好ましくは１．６〜２．０
ｇ／ｃｍ3、気孔率は通常３〜２５％、好ましくは５〜
２０％である。Examples of the resin used as the densified matrix include a phenol resin, a furan resin and an epoxy resin, and a phenol resin having a high carbonization yield is particularly preferable. Moreover, when using pitch and CVD carbon as a densification matrix, the isotropic and anisotropic types do not matter. Usually, 1000 ° C or higher, preferably 1300 ° C during the densification process to the final stage.
As described above, the C / C composite material is produced by heat treatment at a temperature of usually 3000 ° C. or lower, preferably 2400 ° C. or lower. The bulk density of the C / C composite material is usually 1.5 to 2.2 g / cm 3 , preferably 1.6 to 2.0.
g / cm 3 , porosity is usually 3 to 25%, preferably 5 to
20%.
【００１１】本発明の摺動材は、以上のようなＣ／Ｃ複
合材に以下の無機物質の微粒子を任意の方法で含有させ
たものである。ここでの無機物質の微粒子は、４族から
６族元素の単体又はその炭化物、窒化物、酸化物であ
る。そのうち、特にハフニウム、タンタル、タングステ
ン又はそれらの炭化物、窒化物、酸化物が好ましく、炭
化ハフニウム、タングステン及びタンタルが特に好まし
い。かかる微粒子は複数の種類のものを併用してもよ
い。The sliding material of the present invention comprises the above C / C composite material containing the following fine particles of an inorganic substance by an arbitrary method. The fine particles of the inorganic substance here are a simple substance of Group 4 to Group 6 elements or their carbides, nitrides, and oxides. Of these, hafnium, tantalum, tungsten, or their carbides, nitrides, and oxides are particularly preferable, and hafnium carbide, tungsten, and tantalum are particularly preferable. A plurality of types of such fine particles may be used in combination.
【００１２】微粒子の粒子径は、通常０．０１μｍ以
上、好ましくは０．１μｍ以上であり、また、通常１０
μｍ以下、好ましくは５μｍ以下、特に好ましくは１μ
ｍ以下である。摺動材の摩擦係数及び摩耗量の改善に
は、添加物ができるだけ微粒子で存在していることが好
ましい。摺動面に存在する添加物が、研磨成分としてＣ
／Ｃ複合材基材を削り、その研削抵抗で摩擦係数が高く
なるが、添加物の粒子径が大きいと研削されるＣ／Ｃ複
合材基材も大きくなり、結果として摩耗が増大するもの
と推定される。従って、粒子径が１０μｍよりも大きく
なると、摩耗が多くなるばかりでなく、炭素繊維強化炭
素複合基材への添加が不均一になり、特に炭素繊維強化
炭素複合基材の気孔に微粒子を担持させる場合は気孔に
微粒子が入りにくくなるのであまり好ましくない。一
方、粒子径が０．０１μｍよりも小さくなると、摩耗低
下の効果が少なくなる上、微粒子を粉砕するためのコス
トが高くなるので好ましくない。なお、ここで言う粒子
径とは、レーザー法により測定した数平均粒子径のこと
をいう。The particle size of the fine particles is usually 0.01 μm or more, preferably 0.1 μm or more, and usually 10
μm or less, preferably 5 μm or less, particularly preferably 1 μm
m or less. In order to improve the friction coefficient and the wear amount of the sliding material, it is preferable that the additive be present in the form of fine particles as much as possible. The additive present on the sliding surface is C as a polishing component.
/ C composite material base material is ground, the friction coefficient becomes high due to the grinding resistance, but if the particle size of the additive is large, the C / C composite material base material to be ground also becomes large, resulting in increased wear. Presumed. Therefore, if the particle size is larger than 10 μm, not only is abrasion increased, but addition to the carbon fiber-reinforced carbon composite substrate becomes uneven, and in particular, fine particles are carried in the pores of the carbon fiber-reinforced carbon composite substrate. In this case, it is not preferable because it becomes difficult for fine particles to enter the pores. On the other hand, if the particle size is smaller than 0.01 μm, the effect of reducing wear is reduced and the cost for pulverizing the fine particles is increased, which is not preferable. The particle size referred to here means the number average particle size measured by the laser method.
【００１３】以上の微粒子をＣ／Ｃ複合材に含有させる
方法には何ら制限はないが、プリフォームや低緻密化品
への担持は、Ｃ／Ｃ複合材の気孔が多く、担持させた微
粒子が脱落したり、脱落を防止するために樹脂等で固定
する必要がある。また、Ｃ／Ｃ複合材は高温で熱処理し
て製造するので、微粒子の種類によっては、熱処理によ
り性質が変化してしまう可能性がある。そこで、Ｃ／Ｃ
複合材を緻密化して基材として仕上げてから、その気孔
中に微粒子を含浸する方法が好ましい。There is no limitation on the method of incorporating the above-mentioned fine particles into the C / C composite material, but the C / C composite material has a large number of pores so that it can be supported on a preform or a low-density product. Must be fixed with a resin or the like to prevent it from falling off. Further, since the C / C composite material is manufactured by heat treatment at a high temperature, the properties may change due to the heat treatment depending on the type of fine particles. So C / C
A method is preferred in which the composite material is densified and finished as a base material, and then fine particles are impregnated into the pores.
【００１４】例えば、以下の方法がある。無機物質の微
粒子を分散させた溶剤中にＣ／Ｃ複合材を浸漬し、該Ｃ
／Ｃ複合材の内部の気孔に存在する気体を除去、次いで
微粒子及び溶剤をＣ／Ｃ複合材内部の気孔に含浸させた
後、溶剤を除去、乾燥する方法が挙げられる。また、乾
燥後、必要に応じて、焼成処理を行ってもよい。溶剤中
に分散させる微粒子の量は、予めＣ／Ｃ複合材の気孔量
を測定し、その気孔量と目標の含浸量に合わせて調整し
てもよい。含浸に用いる溶剤としては、後で乾燥させた
時に炭素繊維強化炭素複合基材に残留しないものが適し
ており、沸点が２００℃以下の溶剤、例えば、水、エタ
ノール、プロパノール等のアルコール類、グリコール類
等が使用される。また、微粒子の分散性を高めるため
に、ポリエチレンオキサイド等の増粘剤を加え、溶剤の
粘度を調整することができる。For example, there are the following methods. The C / C composite material is immersed in a solvent in which fine particles of an inorganic substance are dispersed,
A method of removing the gas existing in the pores inside the / C composite material, then impregnating the pores inside the C / C composite material with the fine particles and the solvent, and then removing the solvent and drying. In addition, after the drying, a firing treatment may be performed, if necessary. The amount of fine particles to be dispersed in the solvent may be adjusted in advance by measuring the amount of pores of the C / C composite material and adjusting the amount of pores and the target impregnation amount. As the solvent used for the impregnation, those which do not remain in the carbon fiber reinforced carbon composite substrate when dried later are suitable, and the solvent having a boiling point of 200 ° C. or lower, for example, alcohols such as water, ethanol and propanol, glycol Kinds etc. are used. Further, in order to enhance the dispersibility of the fine particles, a viscosity increasing agent such as polyethylene oxide can be added to adjust the viscosity of the solvent.
【００１５】微粒子の含有量は、Ｃ／Ｃ複合材の総重量
の通常０．０１重量％以上、好ましくは０．１重量％以
上であり、また、通常３重量％以下、好ましくは１重量
％以下である。０．０１重量％未満であると効果が充分
に得られない。一方、３重量％を超えると微粒子同士の
摩擦が起こり摩擦係数が低下するばかりでなく、Ｃ／Ｃ
複合材への添加含浸が難しくなる場合がある。また、該
微粒子は、炭素繊維強化炭素複合材の表面近傍に担持さ
れていることが望ましく、微粒子の表面から少なくとも
1ｍｍ以上、好ましくは３ｍｍ以上１０mm以下の内部ま
で含浸され、担持された状態にあるのがよい。１ｍｍ未
満の含浸では、摩擦による摩耗で摺動材の厚みが１ｍｍ
未満まで減少したときに含浸微粒子の効果がなくなる。
また、１０ｍｍを超える含浸は、緻密化度の高いＣ／Ｃ
複合材の場合には難しく、一般に、摩擦材として使用す
る部分の厚みは多くの場合１０ｍｍ以下で十分である。The content of the fine particles is usually 0.01% by weight or more, preferably 0.1% by weight or more, and usually 3% by weight or less, preferably 1% by weight, based on the total weight of the C / C composite material. It is the following. If it is less than 0.01% by weight, the effect cannot be sufficiently obtained. On the other hand, if it exceeds 3% by weight, not only friction of fine particles occurs but the coefficient of friction decreases, but also C / C
Additional impregnation into the composite may be difficult. Further, it is desirable that the fine particles are supported near the surface of the carbon fiber reinforced carbon composite material, and at least from the surface of the fine particles.
It is preferable that the inside of 1 mm or more, preferably 3 mm or more and 10 mm or less is impregnated and supported. If the impregnation is less than 1 mm, the sliding material will have a thickness of 1 mm due to abrasion due to friction.
The effect of impregnated fine particles disappears when the amount is reduced to less than 1.
In addition, if the impregnation exceeds 10 mm, C / C with a high degree of densification
In the case of a composite material, it is difficult, and in general, the thickness of the portion used as a friction material is often 10 mm or less.
【００１６】以上のような本発明の特定のＣ／Ｃ複合材
からなる摺動材は、ディスクとパッドから構成される場
合、ディスク、パッドのいずれか一方、又は、ディスク
とパッドの両方に微粒子を含有させることができる。ま
た、ディスクとパッドの両方に微粒子を含有させる場合
は、ディスクとパッドに含有する微粒子の種類は同じで
あっても違っていてもよい。When the sliding material made of the specific C / C composite material of the present invention as described above is composed of a disk and a pad, fine particles are formed on either the disk or the pad, or both the disk and the pad. Can be included. When both the disc and the pad contain fine particles, the types of fine particles contained in the disc and the pad may be the same or different.
【００１７】[0017]
【実施例】以下、本発明を実施例を用いて更に詳細に説
明するが、本発明はその要旨を超えない限り、以下の実
施例により限定されるものではない。
実施例１
ＰＡＮ系炭素繊維の３次元プリフォーム（嵩密度０．４
５ｇ／ｃｍ3）に、ピッチを含浸した後に焼成する緻密
化工程を繰り返し、２０００℃で熱処理して気孔率１０
％、嵩密度１．８０ｇ／ｃｍ3のＣ／Ｃ複合材を製造し
た。これを外径２７４φのディスクブレーキ形状に加工
し、平均粒子径０．９μｍのＨｆＣを２．３重量％とポ
リエチレンオキサイド０．１重量％を含む水：イソプロ
パノール（重量比７：３）の混合溶液に浸漬し、５０Ｔ
ｏｒｒ以下の減圧にした後常圧に戻して、ＨｆＣ粒子と
溶剤をＣ／Ｃ複合材に含浸させた。その後、乾燥により
溶剤を除去する操作を２回繰り返して、ＨｆＣがＣ／Ｃ
複合材に対し０．３重量％含浸されたディスクブレーキ
を得た。このデイスクブレーキを半分に切断して実体顕
微鏡で観察したところ、摺動表面から少なくとも３ｍｍ
の部位までは充分にＨｆＣの微粒子が入っている事が確
認できた。一方、ディスクと同じＰＡＮ系炭素繊維の３
次元プリフォームに、ピッチを含浸した後に焼成する緻
密化工程を繰り返し、１６００℃で熱処理して、気孔率
１３％、嵩密度１．７０ｇ／ｃｍ3のＣ／Ｃ複合材製パ
ッドを得た。以上の方法で得たＣ／Ｃ複合材製ディスク
／パッドを摺動面の平均回転周速３０ｍ／ｓ、摺動面圧
３００PSI、単位面積当たりの吸収エネルギー（ディス
ク）が７５０Ｊ／ｃｍ2の条件で摩擦試験を行った結
果、平均の摩擦係数が０．４９、ディスクの摩耗率が
８．７×１０-4mm/stop/surf.、パッドの摩耗率が８．
７×１０-4mm/stop/surf.であった。以上の結果を評価
結果を表―１に示す。EXAMPLES The present invention will be described in more detail below with reference to examples, but the present invention is not limited to the following examples as long as the gist thereof is not exceeded. Example 1 Three-dimensional preform of PAN-based carbon fiber (bulk density 0.4
The densification step of impregnating with pitch after 5 g / cm 3 ) and firing is repeated, and heat treatment is performed at 2000 ° C. to obtain a porosity of 10
%, And a bulk density of 1.80 g / cm 3 was produced. This was processed into a disc brake shape with an outer diameter of 274φ, and a mixed solution of water: isopropanol (weight ratio 7: 3) containing 2.3% by weight of HfC having an average particle size of 0.9 μm and 0.1% by weight of polyethylene oxide. Soak in 50T
After reducing the pressure to or or less, the pressure was returned to normal pressure, and the HfC particles and the solvent were impregnated into the C / C composite material. After that, the operation of removing the solvent by drying is repeated twice, and HfC becomes C / C.
A disc brake impregnated with 0.3% by weight of the composite material was obtained. When this disc brake was cut in half and observed with a stereomicroscope, at least 3 mm from the sliding surface
It was confirmed that HfC fine particles were sufficiently contained up to the area. On the other hand, 3 of the same PAN-based carbon fiber as the disc
A densification step of impregnating the three- dimensional preform with pitch and then firing was repeated, and heat treatment was performed at 1600 ° C. to obtain a C / C composite material pad having a porosity of 13% and a bulk density of 1.70 g / cm 3 . The C / C composite material disk / pad obtained by the above method was used under the conditions that the average rotational peripheral speed of the sliding surface was 30 m / s, the sliding surface pressure was 300 PSI, and the absorbed energy per unit area (disk) was 750 J / cm 2 . As a result of a friction test, the average friction coefficient was 0.49, the disc wear rate was 8.7 × 10 −4 mm / stop / surf., And the pad wear rate was 8.
It was 7 × 10 −4 mm / stop / surf. The evaluation results are shown in Table-1.
【００１８】比較例１
実施例１のディスクにＨｆＣを含浸しなかった他は、実
施例１と同一方法でＣ／Ｃ複合材製ディスクとパッドを
製造した。実施例１と同じ摩擦試験を行った評価結果を
表―１に示す。
比較例２
実施例１と同様にして得られたＣ／Ｃ複合材ディスク基
材に平均粒子径１．０μｍのＳｉＣを０．３６％含浸
し、ディスクブレーキを得た。実施例１と同じパッドと
組み合わせ、実施例１と同じ摩擦試験を行った評価結果
を表―１に示す。
比較例３
実施例１と同様にして得られたＣ／Ｃ複合材ディスク基
材に平均粒子径１．０μｍの、ＢＮを０．２％含浸し、
ディスクブレーキを得た。実施例１と同じパッドと組み
合わせ、実施例１と同じ摩擦試験を行った評価結果を表
−１に示す。Comparative Example 1 A C / C composite disk and pad were manufactured in the same manner as in Example 1 except that the disk of Example 1 was not impregnated with HfC. The evaluation results of the same friction test as in Example 1 are shown in Table-1. Comparative Example 2 A C / C composite material disk substrate obtained in the same manner as in Example 1 was impregnated with 0.36% of SiC having an average particle diameter of 1.0 μm to obtain a disk brake. Table 1 shows the evaluation results obtained by conducting the same friction test as in Example 1 in combination with the same pad as in Example 1. Comparative Example 3 A C / C composite disk substrate obtained in the same manner as in Example 1 was impregnated with 0.2% of BN having an average particle diameter of 1.0 μm,
Got a disc brake. Table 1 shows the evaluation results obtained by conducting the same friction test as in Example 1 in combination with the same pad as in Example 1.
【００１９】[0019]
【表１】 [Table 1]
【００２０】実施例２
実施例１と同様にして得られたＣ／Ｃ複合材ディスク基
材に平均粒子径０．６μｍのＷを０．７％含浸した後に
１６００℃で熱処理し、ＷとＣ／Ｃ複合材基材を反応さ
せ、ディスクブレーキを得た。得られたＣ／Ｃ複合材デ
ィスクを半分に切断してＳＥＭ−ＥＤＸ（Scanning Ele
ctron Microscope - Energy DispersiveX-ray analyze
r）で観察したところ、摺動表面から少なくとも３ｍｍ
の部位までは充分にＷ原子が検出された。また、該Ｃ／
Ｃ複合材ディスクをＸ線回折により分析したところ、炭
素のピークの他、ＷＣとＷ2Ｃのピークが検出された。
パッドは、PAN系炭素繊維の２次元プリフォーム（嵩密
度０．６３ｇ／ｃｍ3）に、ピッチを含浸した後焼成す
る緻密化工程を繰り返し、２０００℃で熱処理して気孔
率１６％、嵩密度１．６５ｇ／ｃｍ3の基材を作製し
た。パッドには含浸を行わず、Ｗを含浸したディスクと
組み合わせ実施例１と同じ摩擦試験を行った。評価結果
を表―２に示す。
比較例４
実施例２のディスクにＷを含浸しなかった他は、実施例
２と同一方法でＣ／Ｃ複合材製ディスクとパッドを製造
した。実施例２と同じ摩擦試験を行った。評価結果を表
―２に示す。Example 2 A C / C composite material disk substrate obtained in the same manner as in Example 1 was impregnated with 0.7% of W having an average particle size of 0.6 μm and then heat-treated at 1600 ° C. to obtain W and C. The / C composite material substrate was reacted to obtain a disc brake. The obtained C / C composite material disc was cut in half and SEM-EDX (Scanning Ele
ctron Microscope-Energy DispersiveX-ray analyze
At least 3 mm from the sliding surface when observed under r)
W atoms were sufficiently detected up to the site. Also, the C /
When the C composite disk was analyzed by X-ray diffraction, WC and W2C peaks were detected in addition to the carbon peak.
The pad is a two-dimensional preform of PAN-based carbon fiber (bulk density: 0.63 g / cm 3 ), which is repeatedly densified by impregnating pitch and then firing, and heat-treated at 2000 ° C. to have a porosity of 16% and a bulk density. A base material of 1.65 g / cm 3 was prepared. The pad was not impregnated and the same friction test as in Example 1 was performed in combination with a disc impregnated with W. The evaluation results are shown in Table-2. Comparative Example 4 A C / C composite disk and pad were manufactured in the same manner as in Example 2 except that the disk of Example 2 was not impregnated with W. The same friction test as in Example 2 was performed. The evaluation results are shown in Table-2.
【００２１】[0021]
【表２】 [Table 2]
【００２２】実施例３
実施例１と同様にして得られたＣ／Ｃ複合材ディスク基
材に平均粒子径０．６μｍのＴａを０．２８％含浸した
後に１６００℃で熱処理し、ＴａとＣ／Ｃ複合材基材を
反応させ、ディスクブレーキを得た。得られたＣ／Ｃ複
合材ディスクを半分に切断してＳＥＭ−ＥＤＸ（Scanni
ng Electron Microscope - Energy Dispersive X-ray a
nalyzer）で観察したところ、摺動表面から少なくとも
３ｍｍの部位までは充分にＴａ原子が検出された。ま
た、該Ｃ／Ｃ複合材ディスクをＸ線回折により分析した
ところ、炭素のピークの他、ＴａＣのピークが検出され
た。パッドは、PAN系炭素繊維の２次元プリフォーム
（嵩密度０．６３ｇ／ｃｍ3）に、ピッチを含浸した後
焼成する緻密化工程を繰り返し、１６００℃で熱処理し
て気孔率１５％、嵩密度１．６７ｇ／ｃｍ3の基材を作
製した。パッドには含浸を行わず、Ｔａを含浸したディ
スクと組み合わせ実施例１と同じ摩擦試験を行った。評
価結果を表―３に示す。Example 3 A C / C composite disk substrate obtained in the same manner as in Example 1 was impregnated with 0.28% of Ta having an average particle size of 0.6 μm and then heat-treated at 1600 ° C. to obtain Ta and C. The / C composite material substrate was reacted to obtain a disc brake. The resulting C / C composite disc was cut in half and SEM-EDX (Scanni
ng Electron Microscope-Energy Dispersive X-ray a
As a result of observation with a nalyzer), Ta atoms were sufficiently detected from the sliding surface to a site of at least 3 mm. When the C / C composite material disc was analyzed by X-ray diffraction, a TaC peak was detected in addition to the carbon peak. The pad is a two-dimensional preform of PAN-based carbon fiber (bulk density: 0.63 g / cm 3 ), which is repeatedly densified by impregnating pitch and then firing, and heat-treated at 1600 ° C. to have a porosity of 15% and a bulk density. A base material of 1.67 g / cm 3 was prepared. The pad was not impregnated and the same friction test as in Example 1 was performed in combination with the disc impregnated with Ta. The evaluation results are shown in Table-3.
【００２３】実施例４
実施例３と同様にして得られたＣ／Ｃ複合材ディスク基
材に平均粒子径１．０μｍのＴｉＮを０．２６％含浸し
ディスクブレーキを得た。実施例３と同じパッドと組み
合わせ実施例３と同じ摩擦試験を行った。評価結果を表
―３に示す。
実施例５
実施例３と同様にして得られたＣ／Ｃ複合材ディスク基
材に平均粒子径１．０μｍのＭｏＣを０．３５％含浸し
ディスクブレーキを得た。実施例３と同じパッドと組み
合わせ実施例３と同じ摩擦試験を行った。評価結果を表
―３に示す。
比較例５
実施例３のディスクにＴａを含浸しなかった他は、実施
例３と同一方法でＣ／Ｃ複合材製ディスクとパッドを製
造した。実施例３と同じ摩擦試験を行った。評価結果を
表―３に示す。Example 4 A C / C composite material disk substrate obtained in the same manner as in Example 3 was impregnated with 0.26% of TiN having an average particle diameter of 1.0 μm to obtain a disk brake. The same friction test as in Example 3 was performed in combination with the same pad as in Example 3. The evaluation results are shown in Table-3. Example 5 A C / C composite material disk substrate obtained in the same manner as in Example 3 was impregnated with 0.35% of MoC having an average particle diameter of 1.0 μm to obtain a disk brake. The same friction test as in Example 3 was performed in combination with the same pad as in Example 3. The evaluation results are shown in Table-3. Comparative Example 5 A C / C composite disk and pad were manufactured in the same manner as in Example 3 except that the disk of Example 3 was not impregnated with Ta. The same friction test as in Example 3 was performed. The evaluation results are shown in Table-3.
【００２４】[0024]
【表３】 [Table 3]
【００２５】[0025]
【発明の効果】本発明によれば、耐摩耗性を損なうこと
なく、摩擦係数の高い炭素繊維強化炭素複合材からなる
摺動材が提供される。According to the present invention, there is provided a sliding member made of a carbon fiber reinforced carbon composite material having a high friction coefficient without impairing wear resistance.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小原 昭 香川県坂出市番の州町１番地 三菱化学産 資株式会社内 (72)発明者 小川 鉄也 埼玉県和光市中央１丁目４番１号 株式会 社本田技術研究所内 (72)発明者 吉田 聡 埼玉県和光市中央１丁目４番１号 株式会 社本田技術研究所内 (72)発明者 村井 悠 埼玉県和光市中央１丁目４番１号 株式会 社本田技術研究所内 (72)発明者 竹迫 聡 埼玉県和光市中央１丁目４番１号 株式会 社本田技術研究所内 Ｆターム(参考） 3J058 BA41 BA76 FA01 GA27 GA44 GA73 GA82 GA88 GA89 GA92 GA93 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Akira Ohara No. 1 state town in Sakaide City, Kagawa Prefecture Mitsubishi Chemical Shishi Co., Ltd. (72) Inventor Tetsuya Ogawa 1-4-1 Chuo Stock Market, Wako City, Saitama Prefecture Inside Honda Research Laboratory (72) Inventor Satoshi Yoshida 1-4-1 Chuo Stock Market, Wako City, Saitama Prefecture Inside Honda Research Laboratory (72) Inventor Yu Murai 1-4-1 Chuo Stock Market, Wako City, Saitama Prefecture Inside Honda Research Laboratory (72) Inventor Satoshi Takesako 1-4-1 Chuo Stock Market, Wako City, Saitama Prefecture Inside Honda Research Laboratory F term (reference) 3J058 BA41 BA76 FA01 GA27 GA44 GA73 GA82 GA88 GA89 GA92 GA93
Claims (7)
族から６族元素の単体又はその炭化物、窒化物、酸化物
からなる微粒子を担持させることを特徴とする摺動材の
製造方法。1. A carbon fiber-reinforced carbon composite material is provided with 4
A method for producing a sliding material, which comprises supporting fine particles of a simple substance of Group 6 to Group 6 elements or their carbides, nitrides, and oxides.
させた溶剤中に浸漬させることにより、炭素繊維強化炭
素複合材の表面近傍に微粒子を担持させる請求項１の摺
動材の製造方法。2. The method for producing a sliding material according to claim 1, wherein the carbon fiber reinforced carbon composite material is immersed in a solvent in which the fine particles are dispersed to carry the fine particles near the surface of the carbon fiber reinforced carbon composite material. .
１重量％以上、１重量％以下の微粒子を担持させる請求
項１又は２の摺動材の製造方法。3. The total weight of the carbon fiber reinforced carbon composite material is 0.0
The method for producing a sliding member according to claim 1, wherein 1% by weight or more and 1% by weight or less of fine particles are supported.
上、５μｍ以下である請求項１〜３のいずれかの摺動材
の製造方法。4. The method for producing a sliding member according to claim 1, wherein the fine particles have an average particle size of 0.01 μm or more and 5 μm or less.
〜２．２ｇ／ｃｍ3である請求項１〜４のいずれかの摺
動材の製造方法。5. The bulk density of the carbon fiber reinforced carbon composite material is 1.5.
~2.2g / cm 3 in any of the method for producing a sliding member according to claim 1 to 4,.
５％である請求項１〜５のいずれかの摺動材の製造方
法。6. The porosity of the carbon fiber reinforced carbon composite material is 3 to 2.
It is 5%, The manufacturing method of the sliding material in any one of Claims 1-5.
ル、タングステンのいずれかである請求項１〜６のいず
れかの摺動材の製造方法。7. The method for producing a sliding material according to claim 1, wherein the group 4 to 6 element is any one of hafnium, tantalum and tungsten.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002151461A Division JP3414391B1 (en) | 2002-05-24 | 2002-05-24 | Sliding material |
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|---|---|
| JP2003343623A true JP2003343623A (en) | 2003-12-03 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009503396A (en) * | 2005-07-29 | 2009-01-29 | サーフィス トランスフォームズ ピーエルシー | Brake disc and clutch disc improvements or improvements related to brake discs and clutch discs |
| US8216667B2 (en) | 2005-02-14 | 2012-07-10 | Toyo Tanso Co., Ltd. | Tantalum carbide-coated carbon material and production method thereof |
-
2003
- 2003-01-29 JP JP2003020260A patent/JP2003343623A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8216667B2 (en) | 2005-02-14 | 2012-07-10 | Toyo Tanso Co., Ltd. | Tantalum carbide-coated carbon material and production method thereof |
| JP5275567B2 (en) * | 2005-02-14 | 2013-08-28 | 東洋炭素株式会社 | Tantalum carbide-coated carbon material and method for producing the same |
| JP2009503396A (en) * | 2005-07-29 | 2009-01-29 | サーフィス トランスフォームズ ピーエルシー | Brake disc and clutch disc improvements or improvements related to brake discs and clutch discs |
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