JPH05279119A - Carbon material having oxidation resistance and its production - Google Patents
Carbon material having oxidation resistance and its productionInfo
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- JPH05279119A JPH05279119A JP4101897A JP10189792A JPH05279119A JP H05279119 A JPH05279119 A JP H05279119A JP 4101897 A JP4101897 A JP 4101897A JP 10189792 A JP10189792 A JP 10189792A JP H05279119 A JPH05279119 A JP H05279119A
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- carbon material
- resin
- compound
- oxidation resistance
- carbon
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、耐酸化性の優れた炭素
材料に関し、更に詳しくは、炭素材中にＴａ単体又はＴ
ａ化合物が含有された炭素材料に関し、その目的とする
所は、広く治金用、電気用、機械用、航空宇宙産業の分
野、或いは原子炉用部材等、高温雰囲気において使用に
耐える炭素材料を提供せんとするにある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carbon material having excellent oxidation resistance. More specifically, it is a simple substance of Ta or T in a carbon material.
Regarding the carbon material containing the a compound, its purpose is to widely use carbon materials that can withstand use in high temperature atmospheres, such as metallurgical, electrical, mechanical, aerospace industries, or nuclear reactor members. It will be provided.
【０００２】[0002]
【従来の技術】炭素材料は周知の通り、電気・熱の良導
体であると同時に耐熱性、耐食性、潤滑性等数多くのユ
ニークな物理的、化学的な性質を持っており、広範囲の
分野で用いられている。特に高温における唯一の耐熱材
料で、２５００℃迄は温度と共に強度を増し、室温にお
ける値の約２倍に達するという特異な性質を持ってい
る。As is well known, carbon materials are good conductors of electricity and heat, and at the same time have many unique physical and chemical properties such as heat resistance, corrosion resistance and lubricity, and are used in a wide range of fields. Has been. In particular, it is the only heat-resistant material at high temperatures, and has the unique property of increasing in strength with temperature up to 2500 ° C and reaching about twice the value at room temperature.
【０００３】しかしながら、酸素が存在する条件下で
は、炭素材料は一般に４５０℃程度から酸化を受け始
め、それ自身の持つ優れた物理的、化学的特性が低下す
るという大きな欠点を持っている。この現象を防止する
ために、従来から炭素材料の耐酸化処理手段については
種々の検討がなされてきた。However, under the condition that oxygen is present, the carbon material generally starts to be oxidized at about 450 ° C., and the excellent physical and chemical characteristics of the carbon material itself are deteriorated. In order to prevent this phenomenon, various studies have heretofore been made on the oxidation-resistant treatment means for carbon materials.
【０００４】耐酸化処理手段を大別すると次の如くな
る。The oxidation-resistant treatment means are roughly classified as follows.
【０００５】（１）表面を耐酸化性の保護被膜でコート
する手段。(1) Means for coating the surface with an oxidation resistant protective coating.
【０００６】ＳｉＣのコーティングが最も一般的であ
る。この他アルミナ、その他セラミックス、高融点金属
或いはその酸化物等の溶射、又それらの多層溶射による
コーティング、或いは熱分解黒鉛コーティング等があ
る。The coating of SiC is the most common. In addition, there are thermal spraying of alumina, other ceramics, refractory metals or oxides thereof, coating by multilayer thermal spraying thereof, or pyrolytic graphite coating.
【０００７】コーティングの場合、基材炭素と被膜との
熱膨張係数との適応化が課題であり、被膜を通じての酸
素の内部への拡散を十分に抑制出来るような気密性が得
難いこと、また何らかの原因で被膜に欠損、亀裂を生じ
て部分的に被膜が取り去られると、もはや酸化の進行を
防止出来ないという欠点を有する。In the case of coating, adaptation of the coefficient of thermal expansion of the base carbon and the coating film is a problem, and it is difficult to obtain airtightness that can sufficiently suppress the diffusion of oxygen into the interior through the coating film, and If the film is defective or cracked due to the cause and the film is partially removed, there is a drawback that the progress of oxidation can no longer be prevented.
【０００８】（２）炭素の酸化を抑制するような薬品で
浸漬処理する手段。(2) Means for immersion treatment with a chemical that suppresses carbon oxidation.
【０００９】リン酸化合物溶液による含浸処理が代表的
なもので、比較的低い温度域、例えば６５０℃以下では
効果があるが、高密度の炭素材や大部分が閉気孔で構成
される非晶質の炭素材では含浸自体が困難である。更に
高温域では含浸剤の揮発や熱分解を伴い、効果が期待出
来ない。The impregnation treatment with a phosphoric acid compound solution is typical, and is effective in a relatively low temperature range, for example, 650 ° C. or lower, but is a high-density carbon material or an amorphous material composed mostly of closed pores. Impregnation itself is difficult with high quality carbon materials. Further, in the high temperature region, the effect cannot be expected due to volatilization and thermal decomposition of the impregnating agent.
【００１０】（３）炭素の表面に使用条件下で酸化保護
被膜を生成するような物質を製造時に配合する手段。(3) A means for incorporating a substance which forms an oxidation protection film on the surface of carbon under use conditions at the time of production.
【００１１】硼化物（Ｂ4Ｃ等）、珪化物（ＳｉＣ）等
を配合することによって、酸化性条件のもとで自癒性被
膜を生成する複合体を作ることが出来る。この場合は被
膜が外部要因で破壊されても、再び保護膜が生成するの
で、酸化が内部まで進行することが少ないとされてい
る。By incorporating a boride (B 4 C or the like), a silicide (SiC) or the like, it is possible to form a composite which forms a self-healing film under oxidizing conditions. In this case, even if the coating film is destroyed by an external factor, the protective film is formed again, so that it is said that the oxidation rarely proceeds to the inside.
【００１２】具体的には生コークスにＢ4Ｃ又はＢ4Ｃ＋
ＳｉＣ粉末を添加し、摩砕処理を施し、自己焼結性を発
現せしめ、ピッチ等の粘結剤を用いずに、炭素の自己焼
結性によってかかる複合材の緻密化を達成しようとする
手段、また仮焼ピッチコークスに、Ｂ4Ｃ粉末を添加混
合し、ＨＩＰ等による加圧焼成によって、高密度、高強
度の耐酸化性炭素材料を得る手段が代表例として例示出
来る。Concretely, B 4 C or B 4 C + is added to raw coke.
Means for achieving densification of such composite material by adding self-sintering property of carbon by adding SiC powder, subjecting to grinding treatment to develop self-sintering property, and using no binder such as pitch A representative example is a means for obtaining a high-density, high-strength, oxidation-resistant carbon material by adding and mixing B 4 C powder to the calcined pitch coke and performing pressure firing with HIP or the like.
【００１３】いずれも添加剤の融点或いは添加剤と炭素
との共融点以下の温度で焼成する必要がある。従ってこ
の様な材料は耐熱温度に限界があると同時に、大量のセ
ラミックスを配合するために素材の加工性が劣り、又摩
砕処理とか加圧焼成といったプロセスを経る必要がある
ために生産性に難がある。In either case, it is necessary to perform firing at a temperature below the melting point of the additive or the eutectic point of the additive and carbon. Therefore, such a material has a limited heat resistance temperature, at the same time the workability of the material is poor due to the incorporation of a large amount of ceramics, and it is necessary to go through a process such as grinding treatment or pressure firing to improve the productivity. There are difficulties.
【００１４】以上のように、炭素に耐酸化性を賦与する
種々の試みがなされ、用途目的に応じて実際に工業化さ
れているが、炭素材の優れた特性を損なうことなく、高
温でより耐酸化特性の優れた材料が求められている。As described above, various attempts have been made to impart oxidation resistance to carbon, and the carbon has been actually industrialized according to the purpose of use. However, it does not impair the excellent properties of the carbon material and is more resistant to acid at high temperatures. There is a demand for a material having excellent chemical property.
【００１５】[0015]
【発明が解決しようとする課題】本発明が解決しようと
する課題は、簡単なプロセスで耐酸化性の著しく大きい
炭素材及びその製造方法を提供せんとするものである。SUMMARY OF THE INVENTION The problem to be solved by the present invention is to provide a carbon material having extremely high oxidation resistance by a simple process and a method for producing the same.
【００１６】[0016]
【課題を解決するための手段】この課題は、炭素材中に
Ｔａ単体又は（及び）Ｔａ化合物を含有せしめることに
よって解決される。This problem can be solved by incorporating Ta alone or (and) Ta compound in the carbon material.
【００１７】後の実験例でも示す通り、本発明者の研究
によれば、Ｔａ単体又は（及び）Ｔａ化合物を炭素材中
に含有せしめる時は、他の金属単体又はその化合物、例
えばＨｆ、Ｔｉ、Ｚｒ等或いはそれ等の化合物を含有せ
しめる場合に比し、著しく炭素材の耐酸化性を向上せし
め得ることが見出された。本発明はこの新しい知見に基
づいている。As will be shown in the following experimental examples, according to the research conducted by the present inventor, when a simple substance of Ta or (and) a Ta compound is contained in a carbon material, another simple substance of metal or a compound thereof such as Hf, Ti is used. It has been found that the oxidation resistance of the carbon material can be remarkably improved, as compared with the case of containing Zr, Zr or the like or a compound thereof. The present invention is based on this new finding.
【００１８】[0018]
【発明の構成並びに作用】本発明は、炭素材中にＴａ単
体又は（及び）Ｔａ化合物を含有せしめるものである。
これにより、炭素材の耐酸化性を著しく向上せしめるこ
とが出来る。DETAILED DESCRIPTION OF THE INVENTION Structure and Action of the Invention In the present invention, a simple substance of Ta or / and a Ta compound is contained in a carbon material.
This makes it possible to remarkably improve the oxidation resistance of the carbon material.
【００１９】本発明に於いて使用する炭素材としては、
特に限定されず、上記Ｔａ又は（及び）その化合物を含
有せしめ得る炭素材であれば良い。その代表的な炭素材
は、Ｔａ又は（及び）その化合物を最も含有せしめ易い
材料である樹脂就中好ましくは熱硬化性樹脂を炭素化し
た炭素材を例示することが出来る。この際の熱硬化性樹
脂としては、その代表例としてフラン樹脂、フェノール
樹脂等を例示出来る。The carbon material used in the present invention is as follows:
The carbon material is not particularly limited as long as it is a carbon material capable of containing the Ta or / and the compound thereof. As a typical carbon material thereof, a resin which is a material which is most likely to contain Ta or / and its compound, and more preferably a carbon material obtained by carbonizing a thermosetting resin can be exemplified. Typical examples of the thermosetting resin at this time include furan resin and phenol resin.
【００２０】しかしながら、本発明に於いては、樹脂と
しては上記に限定されず、その他エポキシ樹脂、フラン
−フェノール樹脂、フルフリルアルコール樹脂、セルロ
ース等も使用することが出来る。更には場合によって
は、例えば不融化処理を行えば、ポリアクリロニトリ
ル、ポリ塩化ビニリデン等の熱可塑性樹脂も使用するこ
とが出来る。However, in the present invention, the resin is not limited to the above, and other epoxy resin, furan-phenol resin, furfuryl alcohol resin, cellulose or the like can be used. Further, depending on the case, thermoplastic resins such as polyacrylonitrile and polyvinylidene chloride can also be used, for example, if infusible treatment is performed.
【００２１】更にはまた液相炭化を進めるポリ塩化ビニ
ールやピッチ等についても、空気酸化、オゾン酸化、湿
式酸化等の手段を経て使用出来る。Furthermore, polyvinyl chloride, pitch, etc. which promote liquid phase carbonization can also be used through means such as air oxidation, ozone oxidation and wet oxidation.
【００２２】これに含有させるべきＴａ又は（及び）Ｔ
ａ化合物は、通常粉末で、望ましくは３２５メッシュ以
下の粒度の粉末として含有せしめる。Ｔａ化合物として
は、通常Ｔａの酸化物又は炭化物が使用される。Ta or (and) T to be contained in this
The compound a is usually a powder, and is desirably contained as a powder having a particle size of 325 mesh or less. As the Ta compound, Ta oxide or carbide is usually used.
【００２３】これ等の添加量としてはＴａとして炭素材
中に１〜２０重量％、好ましくは５〜１０重量％であ
る。この際、１重量％未満では樹脂中に均一にブレンド
することが困難であり、不均質なものとなる。又２０重
量％より多くなると、もはや耐酸化特性の更なる向上を
果たせないばかりか、炭素材料としての他の優位な特性
（加工性、摺動性、熱や電気の伝導性）が損なわれる。
本発明は少量の添加で大きく耐酸化性を向上し得る点に
工業的に大きな意味を持つものである。The addition amount of these is 1 to 20% by weight, preferably 5 to 10% by weight in the carbon material as Ta. At this time, if the amount is less than 1% by weight, it is difficult to uniformly blend in the resin, resulting in inhomogeneity. On the other hand, if it is more than 20% by weight, not only the oxidation resistance cannot be further improved, but other excellent characteristics as a carbon material (workability, slidability, heat and electric conductivity) are impaired.
The present invention has a great industrial significance in that the oxidation resistance can be greatly improved by adding a small amount.
【００２４】本発明の炭素材料を製造するに際しては、
先ず樹脂成分にＴａ又は（及び）Ｔａ化合物の粉末を均
一に混合し、成形し、硬化する。硬化後必要に応じキュ
アリングを行い、常法に従い炭素化し、更に必要に応じ
常法により黒鉛化処理する。In producing the carbon material of the present invention,
First, Ta or (and) Ta compound powder is uniformly mixed with the resin component, molded, and cured. After curing, curing is carried out if necessary, carbonization is carried out by a conventional method, and further graphitization treatment is carried out by a conventional method if necessary.
【００２５】以下に本発明者の実験により見出された新
しい知見を述べる。The new findings found by the experiments of the present inventor will be described below.
【００２６】Ｔａ又はその化合物をはじめ、その他の各
種添加剤を用いて、実際に炭素材中に含有せしめ、その
特性を測定した。即ち、添加物としてはＭ．Ｐ．２５４
５℃、分解温度２８４０℃のＳｉＣ、炭素との共融点温
度が３１５０℃のＨｆＣ、３３７５℃のＴａＣ、２７７
６℃のＴｉＣ、２８７６℃のＺｒＣを選び、それ等の金
属Ｓｉ、Ｈｆ、Ｔａ、ＴｉとＺｒ、金属オキサイドとし
てＳｉＯ2、ＨｆＯ2、Ｔａ2Ｏ5、ＴｉＯ2とＺｒＯ2を選
んだ。Using Ta or a compound thereof and other various additives, they were actually contained in the carbon material, and the characteristics were measured. That is, M. P. 254
5 ° C., decomposition temperature 2840 ° C. SiC, eutectic point temperature with carbon HfC 3150 ° C., 3375 ° C. TaC, 277
TiC at 6 ° C. and ZrC at 2876 ° C. were selected, and metal Si, Hf, Ta, Ti and Zr, and SiO 2 , HfO 2 , Ta 2 O 5 , TiO 2 and ZrO 2 were selected as metal oxides.
【００２７】これ等夫々をフラン樹脂、フェノール樹脂
に添加混合した。１０００℃迄の炭化では金属及び金属
カーバイトの一部は樹脂の分解に伴う水によって酸化さ
れており、更に２６００℃の黒鉛化処理では、全てがカ
ーバイトとなっていることがＸ線回析で確認された。Each of these was added to and mixed with furan resin and phenol resin. X-ray diffraction shows that in carbonization up to 1000 ° C, some of the metals and metal carbides are oxidized by water accompanying the decomposition of resin, and in the graphitization treatment at 2600 ° C, all become carbides. Confirmed in.
【００２８】又ＳｉＯ2を添加した試験ピースは粉化し
てしまった。このことは炭素−ＳｉＣ系に於けるＳｉＣ
の融点が２５４５℃と低いためにＳｉＣの昇華によるも
のと思われる。The test piece containing SiO 2 was pulverized. This means that SiC in the carbon-SiC system
It is thought that this is due to sublimation of SiC because the melting point of is low at 2545 ° C.
【００２９】比較としてフラン樹脂を炭素化、２６００
℃で黒鉛化処理をしたものを加えた。For comparison, furan resin is carbonized 2600
What was graphitized at ℃ was added.
【００３０】テストピースの空気流通下、最大８５０℃
の耐酸化試験の結果では、Ｔａ、Ｔａ2Ｏ5、ＴａＣを加
えた２６００℃処理品が、他のものと比較して著しい耐
酸化特性を示した。この理由についてはなお明らかでは
ないが、炭素化の過程で炭素粒子のまわりに強固なオキ
サイド膜が生成するものと考えられる。Maximum 850 ° C. under air flow of test piece
As a result of the oxidation resistance test, the 2600 ° C.-treated product containing Ta, Ta 2 O 5 , and TaC showed remarkable oxidation resistance characteristics as compared with the other products. The reason for this is not clear yet, but it is considered that a strong oxide film is formed around the carbon particles during the carbonization process.
【００３１】本発明はかかる知見に基づき、高温で安定
なＴａＣ（Ｍ．Ｐ．３３７５℃）が有効であり、単に熱
硬化性樹脂とＴａ又はＴａ化合物を均一にブレンドする
だけで著しく耐酸化性に富む炭素材の開発に成功したも
のである。Based on the above findings, TaC (MP 3375 ° C.), which is stable at high temperature, is effective in the present invention, and it is remarkably resistant to oxidation simply by uniformly blending a thermosetting resin and Ta or Ta compound. We have succeeded in developing a rich carbon material.
【００３２】[0032]
【実施例】以下に実施例を示し、本発明を説明する。EXAMPLES The present invention will be described below with reference to examples.
【００３３】[0033]
【実施例１】金属Ｔａ、ＴａＣ、及びＴａ2Ｏ5を添加剤
として用いた。Example 1 Metals Ta, TaC, and Ta 2 O 5 were used as additives.
【００３４】各添加物を、夫々フラン樹脂（日立化成
「ヒタフラン３０２」）とナイロン被覆のボールを用
い、ポリエチレン容器の中で２４時間混合した。Each additive was mixed for 24 hours in a polyethylene container using furan resin (Hitachi Kasei "Hitafuran 302") and nylon-coated balls.
【００３５】添加剤の添加量はフラン樹脂に対して５重
量％とした。この混合物に樹脂の硬化剤としてパラトル
エンスルフォン酸を０．５重量％加え、成形硬化後、１
００℃で９６時間キュアリングを行い、次いでアルゴン
ガス雰囲気中で昇温し、１０００℃で２時間保持、その
焼成品を更にアルゴンガス雰囲気中で２６００℃まで昇
温、２６００℃で３０分保持した。得たテストピースの
サイズは５０×４０×５ｍｍ3であった。このピースの
中のＴａの含有量はＴａ添加の場合９．１％、ＴａＣ添
加の場合８．５％、Ｔａ2Ｏ5添加の場合７．５％となっ
た。The amount of the additive added was 5% by weight based on the furan resin. To this mixture was added 0.5% by weight of paratoluenesulfonic acid as a resin curing agent, and after molding and curing, 1
Curing was carried out at 00 ° C. for 96 hours, then the temperature was raised in an argon gas atmosphere and kept at 1000 ° C. for 2 hours, and the baked product was further raised to 2600 ° C. in an argon gas atmosphere and kept at 2600 ° C. for 30 minutes. .. The size of the obtained test piece was 50 × 40 × 5 mm 3 . The Ta content in this piece was 9.1% when Ta was added, 8.5% when TaC was added, and 7.5% when Ta 2 O 5 was added.
【００３６】１０００℃及び２６００℃処理した上記テ
ストピースから、１０×１０×２ｍｍ3のものを切り出
し、空気２００ｍｌ／ｍｉｎの流通下、ＴＧＡで５℃／
ｍｉｎの昇温速度で室温から８５０℃迄昇温、１時間保
持、更に室温迄降温、酸化消耗の比較テストを行った。
その結果を表１に示す。From the above test piece treated at 1000 ° C. and 2600 ° C., a piece of 10 × 10 × 2 mm 3 was cut out, and it was 5 ° C./TGA by TGA under the flow of 200 ml / min of air.
A comparative test was conducted by raising the temperature from room temperature to 850 ° C. at a temperature raising rate of min, holding it for 1 hour, further lowering the temperature to room temperature, and oxidizing consumption.
The results are shown in Table 1.
【００３７】[0037]
【表２】 [Table 2]
【００３８】[0038]
【比較例１】金属Ｈｆ、Ｚｒ、ＨｆＣ、ＳｉＣ、Ｔｉ
Ｃ、ＺｒＣ、ＨｆＯ2、ＳｉＯ2、ＴｉＯ2、及びＺｒＯ2
を各添加剤としてフラン樹脂に対して５重量％混合し
た。その他は実施例１と同様に処理した。Comparative Example 1 Metals Hf, Zr, HfC, SiC, Ti
C, ZrC, HfO 2 , SiO 2 , TiO 2 , and ZrO 2
5% by weight of furan resin was mixed as each additive. Others were processed similarly to Example 1.
【００３９】更に実施例１と同様に酸化消耗テストを行
った。その結果を表１に示す。Further, an oxidation consumption test was conducted in the same manner as in Example 1. The results are shown in Table 1.
【００４０】尚、この際金属Ｈｆについては粉体化が困
難であり、金属Ｚｒについては可燃性であり、除いた。
１０００℃、２６００℃処理品の酸化消耗の比較を表１
に示す。At this time, the metal Hf was difficult to be pulverized, and the metal Zr was flammable, so it was excluded.
Table 1 shows a comparison of the oxidative consumption of 1000 ℃ and 2600 ℃ treated products
Shown in.
【００４１】[0041]
【比較例２】フラン樹脂（日立化成「ヒタフラン３０
２」）に何も添加することなく、実施例１に基づいて硬
化、キュアリング後、アルゴンガス雰囲気中で１０００
℃、２６００℃熱処理し、テストピースを切り出し、実
施例に基づき酸化消耗の比較テストを行った。その結果
を表１に示す。[Comparative Example 2] Furan resin (Hitachi Kasei "Hitafuran 30"
2 ") without any addition, after curing and curing according to Example 1, 1000 in an argon gas atmosphere.
The test piece was cut out by heat treatment at 2 ° C. and 2600 ° C., and a comparative test of oxidation consumption was performed based on the examples. The results are shown in Table 1.
【００４２】[0042]
【実施例２】実施例１に於いて、フラン樹脂にＴａＣと
して０．５４重量％を添加し、その他は実施例１と同様
にしてフラン樹脂炭を得た。このフラン樹脂炭中のＴａ
は１．０重量％とせしめた。実施例１と同様に酸化消耗
の比較テストを行った結果を表２に示す。Example 2 A furan resin charcoal was obtained in the same manner as in Example 1 except that 0.54% by weight of TaC was added to the furan resin. Ta in this furan resin charcoal
Was 1.0% by weight. Table 2 shows the results of a comparative test of oxidative consumption as in Example 1.
【００４３】[0043]
【表２】[Table 2]
【００４４】[0044]
【比較例３】実施例２に於けると同様な処理でＴａＣ添
加、フラン樹脂炭素材を得て、同様に酸化消耗の比較テ
ストを行った。但し、比較例３ではフラン樹脂にＴａＣ
添加量を０．２７重量％迄減らし、得られたフラン樹脂
炭中のＴａを０．５重量％迄減らした。実施例２と同様
に酸化消耗の比較テスト結果を表２に示す。固相での均
一分散が困難になっているものと考えられる。[Comparative Example 3] A TaC-added and furan resin carbon material was obtained by the same treatment as in Example 2, and a comparative test of oxidative consumption was similarly conducted. However, in Comparative Example 3, TaC was used as the furan resin.
The addition amount was reduced to 0.27% by weight, and Ta in the obtained furan resin carbon was reduced to 0.5% by weight. Table 2 shows the results of a comparative test of oxidative consumption as in Example 2. It is considered that uniform dispersion in the solid phase is difficult.
【００４５】[0045]
【実施例３】実施例１でマトリックスとして、レゾール
タイプのフェノール樹脂を用い、フェノール樹脂に対し
て５重量％のＴａ2Ｏ5粉末を加え、ボールミルで混合し
た。成形、硬化後１３０℃で６時間キュアリングを行
い、次いでアルゴンガス雰囲気中で昇温し、１０００℃
で２時間保持、その焼成品を更にアルゴンガス雰囲気中
で２６００℃迄昇温し２時間保持した。得たテストピー
スは５０×４０×５ｍｍ3を得た。テストピースから１
０×１０×２ｍｍ3を切り出し、酸化消耗の比較テスト
を行った。その結果を表１に示す。Example 3 In Example 1, a resol type phenol resin was used as a matrix, 5 wt% of Ta 2 O 5 powder was added to the phenol resin, and they were mixed by a ball mill. After molding and curing, curing is performed at 130 ° C for 6 hours, then the temperature is raised in an argon gas atmosphere to 1000 ° C.
The temperature was maintained for 2 hours, and the baked product was further heated to 2600 ° C. in an argon gas atmosphere and maintained for 2 hours. The obtained test piece was 50 × 40 × 5 mm 3 . 1 from the test piece
0 × 10 × 2 mm 3 was cut out and a comparative test for oxidation consumption was performed. The results are shown in Table 1.
【００４６】[0046]
【比較例４】比較例２でフラン樹脂に骨材として天然黒
鉛粉末を２０重量％添加したものを作り、実施例１に基
づいて硬化、キュアリング後、アルゴンガス雰囲気中で
１０００℃、更に２６００℃熱処理した。テストピース
を切り出し、酸化消耗の比較テストを試みた。その結果
を表１に示した。[Comparative Example 4] In Comparative Example 2, a furan resin containing 20% by weight of natural graphite powder as an aggregate was prepared. After curing and curing according to Example 1, 1000 ° C in an argon gas atmosphere, and further 2600. Heat treatment was performed at ℃. A test piece was cut out and a comparative test of oxidation consumption was tried. The results are shown in Table 1.
【表１の１】 [1 in Table 1]
【表１の２】 [Table 1-2]
Claims (4)
物を含有せしめて成る耐酸化性炭素材料。1. An oxidation resistant carbon material comprising a simple substance of Ta or / and a Ta compound in the carbon material.
る、請求項１に記載の炭素材料。2. The carbon material according to claim 1, wherein the carbon material is a thermosetting resin.
Ｔａ元素換算で１〜２０重量％である、請求項１に記載
の炭素材料。3. The content of Ta or (and) Ta compound is
The carbon material according to claim 1, which is 1 to 20% by weight in terms of Ta element.
混合し、硬化、成形後、不活性ガス中で炭素化し、必要
に応じ更に黒鉛化処理することを特徴とする、耐酸化性
炭素材料の製造方法。4. An oxidation resistant carbon characterized by mixing Ta alone or (and) a Ta compound with a resin, curing and molding, carbonizing in an inert gas, and further graphitizing if necessary. Material manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4101897A JPH05279119A (en) | 1992-03-27 | 1992-03-27 | Carbon material having oxidation resistance and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4101897A JPH05279119A (en) | 1992-03-27 | 1992-03-27 | Carbon material having oxidation resistance and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05279119A true JPH05279119A (en) | 1993-10-26 |
Family
ID=14312717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4101897A Pending JPH05279119A (en) | 1992-03-27 | 1992-03-27 | Carbon material having oxidation resistance and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05279119A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005102961A1 (en) * | 2004-04-23 | 2005-11-03 | Toyota Jidosha Kabushiki Kaisha | Composite carbon material having metal carbide particles dispersed therein and method for preparation thereof |
| CN115259901A (en) * | 2022-06-29 | 2022-11-01 | 南京大学 | Preparation method of TaC protective coating material on carbon material surface |
-
1992
- 1992-03-27 JP JP4101897A patent/JPH05279119A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005102961A1 (en) * | 2004-04-23 | 2005-11-03 | Toyota Jidosha Kabushiki Kaisha | Composite carbon material having metal carbide particles dispersed therein and method for preparation thereof |
| KR100818577B1 (en) * | 2004-04-23 | 2008-04-02 | 도요다 지도샤 가부시끼가이샤 | Composite carbon material having metal carbide particles dispersed therein and method for preparation thereof |
| US8058197B2 (en) | 2004-04-23 | 2011-11-15 | Toyota Jidosha Kabushiki Kaisha | Carbon composite materials comprising particles of metal carbides dispersed therein and method for producing the same |
| CN115259901A (en) * | 2022-06-29 | 2022-11-01 | 南京大学 | Preparation method of TaC protective coating material on carbon material surface |
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