JPS5857393B2 - High-strength titanium nitride/metal boride composite ceramics - Google Patents
High-strength titanium nitride/metal boride composite ceramicsInfo
- Publication number
- JPS5857393B2 JPS5857393B2 JP56143635A JP14363581A JPS5857393B2 JP S5857393 B2 JPS5857393 B2 JP S5857393B2 JP 56143635 A JP56143635 A JP 56143635A JP 14363581 A JP14363581 A JP 14363581A JP S5857393 B2 JPS5857393 B2 JP S5857393B2
- Authority
- JP
- Japan
- Prior art keywords
- titanium nitride
- metal boride
- strength titanium
- boride composite
- strength
- 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.)
- Expired
Links
Description
【発明の詳細な説明】
本発明は、高強度な窒化チタン・ホウ化金属複合セラミ
ックス、さらに詳しくいえば、ＴｉＮに少なくとも１種
以上のホウ化物を混合した粉末の焼結体から成る、高密
度、高強度かつ耐酸化性に優れた材料に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention is a high-strength titanium nitride/metal boride composite ceramic, more specifically, a high-density titanium nitride metal boride composite ceramic made of a sintered powder of TiN mixed with at least one boride. , relates to materials with high strength and excellent oxidation resistance.
窒化チタンは、一般に融点力塙く、硬度はビッカースで
２０００ｋｇ／ｍａ程度と硬く、耐酸化性があるため、
切削工具材、耐熱材として用途が期待されている。Titanium nitride generally has a high melting point, a Vickers hardness of about 2000 kg/ma, and is oxidation resistant.
It is expected to be used as a cutting tool material and a heat-resistant material.
しかしながら、ＴｉＮ単味焼結体を得るためには焼結温
度を２２００〜２３００℃とする必要がある上、得られ
た焼結体は抗折強度が低く、もろいという欠点がある。However, in order to obtain a TiN single sintered body, it is necessary to set the sintering temperature to 2200 to 2300° C., and the resulting sintered body has the disadvantage of having low flexural strength and being brittle.
一方ＴｉＢ２ 、 ＴａＢ２ ｔ Ｖ Ｂ２ ｔ Ｎｂ
Ｂ２ ｔ ＣｒＢ２ ｔＭｏＢ２ ＞ ＭｎＢ２ ）
ＺｒＢ２） ＡｌＢ２ ） Ｗ２ ＢＢ ）Ｍｏ２Ｂ５
等ＭＢ２型もしくはＭ２Ｂ、型ホウ化物も、一般に融点
が高く、高硬度で耐酸化性が比較的あり、切削工具材、
耐熱材、耐摩耗材としての用途が期待されている。On the other hand, TiB2 , TaB2 t V B2 t Nb
B2 tCrB2 tMoB2 > MnB2)
ZrB2) AlB2) W2 BB) Mo2B5
MB2 type or M2B type borides generally have a high melting point, high hardness, and relatively oxidation resistance, and are used as cutting tool materials,
It is expected to be used as a heat-resistant and wear-resistant material.
しかしながら上記ホウ化物１種以上から成る焼結体は抗
折強度が低くもろいという欠点がある。However, sintered bodies made of one or more of the above borides have a drawback of having low bending strength and being brittle.
上記ＴｉＮおよびホウ化金属ともに機械的強度を改善せ
ねば工業的利用はできない。Both TiN and metal boride cannot be used industrially unless their mechanical strength is improved.
本発明者らは、先にホウ化金属に対し機械的強度を改善
する発明（例えば特許出願公開番号昭５５−１２８５６
０）を行ってきたが、これらの発明はサーメットにする
ことにより強度の改善をはかったものである。The present inventors have previously discovered inventions that improve the mechanical strength of metal borides (for example, Patent Application Publication No. 12856/1983).
0), but these inventions aim to improve the strength by using cermet.
サーメットにすると、いかにしても耐熱性の低下は避け
られない。When using cermet, a decrease in heat resistance is unavoidable no matter what you do.
そこで、本発明者らはさらに研究を重ねた結果、Ｔ Ｉ
Ｂ ２に対しＴｉＮを添加して得た焼結体は、耐熱性
を低下させずに、十分に高い強度を有することが判明し
、この知見に基づいて本発明をなすに至った。Therefore, as a result of further research, the inventors found that T.I.
It has been found that a sintered body obtained by adding TiN to B2 has sufficiently high strength without reducing heat resistance, and the present invention has been made based on this knowledge.
すなわち、本発明はＴｉＮにＴｉＢ２．ＴａＢ２゜■Ｂ
２．ＮｂＢ２．ＣｒＢ２２ＭｏＢ２２ＭｎＢ２゜ＺｒＢ
２．ＡｌＢ２．Ｗ２Ｂ５２Ｍ０２Ｂ５のＭＢ２型および
Ｍ２Ｂ２型ホウ化物の１種以上を全重量に対し、１０〜
６０重量％添加した原料粉末を焼結して得られる高強度
窒化チタン・ホウ化金属複合セラミックスを提供するも
のである。That is, the present invention combines TiN with TiB2. TaB2゜■B
2. NbB2. CrB22MoB22MnB2゜ZrB
2. AlB2. One or more types of MB2 type and M2B2 type borides of W2B52M02B5 are added in an amount of 10 to 10% based on the total weight.
A high-strength titanium nitride/metal boride composite ceramic obtained by sintering raw material powder containing 60% by weight is provided.
窒化チタン及びホウ化金属は平均粒径５μ以下の粉末を
用いるのが好ましい。It is preferable to use powders of titanium nitride and metal boride with an average particle size of 5 μm or less.
ＴｉＮに添加するホウ化金属は１種もしくは２種以上を
１０〜６０重量％の範囲で配合して用いることができる
。The metal boride added to TiN can be used singly or in combination in a range of 10 to 60% by weight.
１０％未満あるいは６０％以上のホウ化金属を添加する
と機械的強度が低下する。If less than 10% or more than 60% of metal boride is added, the mechanical strength will decrease.
本発明窒化チタン・ホウ化金属複合セラミックスを製造
するには、窒化チタンに、１種以上のホウ化金属を添加
し、よく混合した後、゛この混合粉末を黒鉛型に充てん
し、真空、アルゴンまたは水素のような中性もしくは還
元性雰囲気中において１００〜３００ｋｇ／誕程度の圧
力下で１３００°Ｃ〜２３００℃で加熱焼結する。To produce the titanium nitride/metal boride composite ceramic of the present invention, one or more metal borides are added to titanium nitride, mixed well, and then the mixed powder is filled into a graphite mold and placed under vacuum and argon gas. Alternatively, it is heated and sintered at 1300° C. to 2300° C. under a pressure of about 100 to 300 kg/birth in a neutral or reducing atmosphere such as hydrogen.
まだ普通焼結法あるいはＨ，１，Ｐ法等を使用しても焼
結体が得られる。A sintered body can still be obtained by using the ordinary sintering method or the H,1,P method.
このようにして得られる本発明窒化チタン・ホウ化金属
複合セラミックスは、組織、抗折力、硬度および耐熱性
に優れ、また黄金色を呈し、切削工具材料、耐熱材料、
耐摩耗材料あるいは時計用ケースとして好適である。The titanium nitride/metal boride composite ceramic of the present invention obtained in this way has excellent structure, transverse rupture strength, hardness, and heat resistance, and has a golden color, and can be used as a cutting tool material, a heat-resistant material,
It is suitable as a wear-resistant material or a watch case.
以下実施例により、本発明をさらに詳細に説明する。The present invention will be explained in more detail with reference to Examples below.
実施例 ｌ
ＴｉＮ粉末７０重量％にＴ ｒ Ｂ ２粉末３０重量％
を加えて十分に混合した。Example l 70% by weight of TiN powder and 30% by weight of T r B 2 powder
was added and mixed thoroughly.
次いで、この混合物を黒鉛型に充てんし、真空中におい
て２００ ｋｇ／ｃｒｔｔに加圧しながら、２０００℃
で３０分間加熱した。Next, this mixture was filled into a graphite mold and heated at 2000°C under pressure of 200 kg/crtt in vacuum.
was heated for 30 minutes.
このようにして、抗折強度８０ｋｇ／ｖＭ、ビッカース
硬度１８００ｋｇ／−の焼結体を得た。In this way, a sintered body with a bending strength of 80 kg/vM and a Vickers hardness of 1800 kg/- was obtained.
この焼結体を研摩したところ、黄金色を呈し、さらに電
子顕微鏡で組織観察すると、組織内にはほとんど空孔は
なかった。When this sintered body was polished, it took on a golden color, and when the structure was observed using an electron microscope, it was found that there were almost no pores in the structure.
またこの焼結体を空気中で加熱したが１０００℃までは
ほとんど酸化されず、１２００’Ｃで薄い酸化膜におお
われた。When this sintered body was heated in air, it was hardly oxidized up to 1000°C, and was covered with a thin oxide film at 1200°C.
この酸化膜は機械的ひつかきにも強かった。This oxide film was also resistant to mechanical stress.
実施例 ２
ＴｉＮに所定量の１種以上のホウ化金属を加えて十分に
混合し、この混合粉末を３０分間ホットプレスするか、
あるいは冷間圧縮後所定条件下で２時間普通焼結するこ
とにより焼結体を製造した。Example 2 A predetermined amount of one or more metal borides is added to TiN and mixed thoroughly, and the mixed powder is hot pressed for 30 minutes, or
Alternatively, a sintered body was produced by normal sintering for 2 hours under predetermined conditions after cold compression.
このようにして得た試料の組成、焼結条件及び焼結後の
特性を第１表に示す。Table 1 shows the composition, sintering conditions, and properties after sintering of the sample thus obtained.
Claims (1)
Ｂ２゜ＣｒＢ２２ＭｏＢ２２ＭｎＢ２．ＺｒＢ２．Ａｌ
Ｂ２゜Ｗ２Ｂ６２Ｍ０２Ｂ５のＭＢ２型もしくはＭ２Ｂ
５型ホウ化金属の１種以上を全重量に対し、１０〜６０
重量％添加した原料粉末を焼結して得られる高強度窒化
チタン・ホウ化金属複合セラミックス焼結材料。l Tin, TiB2. TaB2. vB2. Nb
B2°CrB22MoB22MnB2. ZrB2. Al
B2゜W2B62M02B5 MB2 type or M2B
10 to 60% of the total weight of one or more type 5 metal borides
A high-strength titanium nitride/metal boride composite ceramic sintered material obtained by sintering raw material powder with added weight%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56143635A JPS5857393B2 (en) | 1981-09-10 | 1981-09-10 | High-strength titanium nitride/metal boride composite ceramics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56143635A JPS5857393B2 (en) | 1981-09-10 | 1981-09-10 | High-strength titanium nitride/metal boride composite ceramics |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5845170A JPS5845170A (en) | 1983-03-16 |
| JPS5857393B2 true JPS5857393B2 (en) | 1983-12-20 |
Family
ID=15343340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56143635A Expired JPS5857393B2 (en) | 1981-09-10 | 1981-09-10 | High-strength titanium nitride/metal boride composite ceramics |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5857393B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5030597A (en) * | 1989-03-03 | 1991-07-09 | Toray Industries, Inc. | Process for producing ceramic composites |
-
1981
- 1981-09-10 JP JP56143635A patent/JPS5857393B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5845170A (en) | 1983-03-16 |
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