JPH04342472A - Boride/zirconium oxide/titanium carbonitride-based ceramic material having high toughness - Google Patents
Boride/zirconium oxide/titanium carbonitride-based ceramic material having high toughnessInfo
- Publication number
- JPH04342472A JPH04342472A JP3145511A JP14551191A JPH04342472A JP H04342472 A JPH04342472 A JP H04342472A JP 3145511 A JP3145511 A JP 3145511A JP 14551191 A JP14551191 A JP 14551191A JP H04342472 A JPH04342472 A JP H04342472A
- Authority
- JP
- Japan
- Prior art keywords
- zirconium oxide
- boride
- ceramic material
- titanium carbonitride
- based ceramic
- 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.)
- Granted
Links
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 title claims abstract description 7
- 229910001928 zirconium oxide Inorganic materials 0.000 title claims abstract description 7
- 229910010293 ceramic material Inorganic materials 0.000 title claims abstract description 5
- 239000010936 titanium Substances 0.000 title claims description 8
- 229910052719 titanium Inorganic materials 0.000 title claims description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title description 2
- 229910052751 metal Inorganic materials 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 14
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 6
- 238000005245 sintering Methods 0.000 claims abstract description 5
- 239000000843 powder Substances 0.000 claims abstract 2
- 239000011812 mixed powder Substances 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 abstract description 13
- 239000000203 mixture Substances 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 abstract 1
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 10
- 239000000463 material Substances 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- QYEXBYZXHDUPRC-UHFFFAOYSA-N B#[Ti]#B Chemical compound B#[Ti]#B QYEXBYZXHDUPRC-UHFFFAOYSA-N 0.000 description 2
- 229910033181 TiB2 Inorganic materials 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910016459 AlB2 Inorganic materials 0.000 description 1
- 229910019918 CrB2 Inorganic materials 0.000 description 1
- 229910003862 HfB2 Inorganic materials 0.000 description 1
- 229910015425 Mo2B5 Inorganic materials 0.000 description 1
- 229910015173 MoB2 Inorganic materials 0.000 description 1
- 229910019742 NbB2 Inorganic materials 0.000 description 1
- 229910004533 TaB2 Inorganic materials 0.000 description 1
- 101000693961 Trachemys scripta 68 kDa serum albumin Proteins 0.000 description 1
- -1 VB2 Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 150000003608 titanium Chemical class 0.000 description 1
Landscapes
- Ceramic Products (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、耐摩材料、切削工具材
料として好適な高密度、高靭性を有する新規な金属ホウ
化物基セラミックス燒結体に関するものであり、さらに
具体的には、高靭性ホウ化物−酸化ジルコニウム−炭窒
化チタン系セラミックス燒結体に関するものである。[Field of Industrial Application] The present invention relates to a novel metal boride-based ceramic sintered body having high density and high toughness suitable as wear-resistant materials and cutting tool materials. The present invention relates to a sintered compound-zirconium oxide-titanium carbonitride ceramic body.
【０００２】0002
【従来の技術】これまで、ホウ化物系耐摩材料、切削工
具材料として、二ホウ化チタンをマトリックスとし、Ｚ
ｒＯ２を添加燒結したセラミックス（特公昭５９−７６
６８号）や、さらに立方晶炭化物を添加燒結したセラミ
ックス（特公昭５９−７６６９号）が本発明者らによっ
て提案されており、これらは特に靭性を必要とする耐摩
材に適している。しかし、工業の発達の顕著な近年、易
燒結性の追求とさらなる物性の向上が要求されている。
特に、ＺｒＯ２を添加して靭性を改善する場合、ＺｒＯ
２の安定化剤が熱劣化の原因となり、Ｙ２Ｏ３等で安定
化したＺｒＯ２を用いている複合セラミックスは、室温
付近での使用しかできなかった。[Prior Art] Until now, boride-based wear-resistant materials and cutting tool materials have been made using titanium diboride as a matrix and Z
Ceramics sintered with the addition of rO2
The present inventors have proposed ceramics (Japanese Patent Publication No. 59-7669) in which cubic carbides are added and sintered, and these are particularly suitable for wear-resistant materials that require toughness. However, in recent years, with remarkable industrial development, there has been a demand for easier sinterability and further improvements in physical properties. In particular, when adding ZrO2 to improve toughness, ZrO
The stabilizer No. 2 caused thermal deterioration, and composite ceramics using ZrO2 stabilized with Y2O3 etc. could only be used near room temperature.
【０００３】そこで、本発明者は、ホウ化金属−酸化ジ
ルコニウム−金属炭化物系セラミックスの特性改善をさ
らに進めるため、研究を重ねた結果、酸化ジルコニウム
に単斜晶酸化ジルコニウムを用い、また金属炭化物の代
りに炭窒化チタンを添加することにより、さらに特性の
改善が可能であることを見出し、この知見に基づいて本
発明をなすに至った。[0003] Therefore, in order to further improve the properties of metal boride-zirconium oxide-metal carbide ceramics, the inventor of the present invention, as a result of repeated research, used monoclinic zirconium oxide as the zirconium oxide, and also It has been discovered that the properties can be further improved by adding titanium carbonitride instead, and the present invention has been completed based on this knowledge.
【０００４】0004
【発明が解決しようとする課題】本発明は、このような
知見に基づくものであり、従って、その目的とするとこ
ろは、２００ ℃以上に加熱される耐摩工具や切削工具
として広範囲に使用できるような機械的熱的性質を有す
る金属ホウ化物基セラミックス燒結体を提供することに
ある。OBJECTS OF THE INVENTION The present invention is based on this knowledge, and therefore, its purpose is to develop a tool that can be used extensively as wear-resistant tools and cutting tools that are heated to 200°C or higher. An object of the present invention is to provide a metal boride-based ceramic sintered body having excellent mechanical and thermal properties.
【０００５】[0005]
【課題を解決するための手段】本発明者らは、金属ホウ
化物系セラミックスの易燒結性ならびに得られたセラミ
ックスの機械的、熱的特性を改善するため、鋭意研究を
重ねた結果、先に説明したように、酸化ジルコニウムに
単斜晶酸化ジルコニウムを用い、炭窒化物の代わりに、
炭化物にさらに窒素を固溶させた炭窒化物を添加剤とし
て用いると、燒結温度を低くできる上、靭性も向上させ
ることができ、しかも２５０ ℃で ２００ｈ 加熱し
ても劣化現象がないことを見出し、本発明をなすに至っ
たものである。[Means for Solving the Problems] The present inventors have conducted intensive research to improve the sinterability of metal boride ceramics and the mechanical and thermal properties of the obtained ceramics, and as a result, have previously discovered As explained, monoclinic zirconium oxide is used as the zirconium oxide, and instead of carbonitride,
It was discovered that by using carbonitride, which is a solid solution of nitrogen in carbide, as an additive, it is possible to lower the sintering temperature and improve toughness, and there is no deterioration phenomenon even when heated at 250 °C for 200 hours. , which led to the present invention.
【０００６】即ち、本発明は、（Ａ） ＭＢ２，Ｍ２Ｂ
５またはＭＢ型ホウ化物（ Ｍは金属を示す。）の１種
以上に、（Ｂ） 単斜晶 ＺｒＯ２ を添加した混合粉
末を基本成分とし、これに（Ｃ） Ｔｉ（Ｃ，Ｎ） を
添加したホウ化金属系セラミックス燒結体に係わるもの
である。That is, the present invention provides (A) MB2, M2B
The basic component is a mixed powder in which (B) monoclinic ZrO2 is added to one or more of 5 or MB type borides (M represents a metal), and (C) Ti(C,N) is added to this. The invention relates to a metal boride ceramic sintered body.
【０００７】本発明の主成分である（Ａ） 成分は、Ｔ
ｉＢ２，ＣｒＢ２，ＶＢ２，ＴａＢ２，ＮｂＢ２，Ｍｎ
Ｂ２，ＭｏＢ２，ＨｆＢ２，ＹＢ２，ＡｌＢ２，ＭｇＢ
２などの二ホウ化物、Ｗ２Ｂ５，Ｍｏ２Ｂ５などの金属
五二ホウ化物、あるいはＴｉＢ，ＣｒＢ，ＶＢ，ＴａＢ
，ＮｂＢ，ＭｎＢ，ＭｏＢ，ＨｆＢ，ＷＢ，ＦｅＢ な
どの一ホウ化物の中から選ばれた一種以上の金属ホウ化
物である。この（Ａ） 成分の金属ホウ化物は、全量に
対して２０〜８８重量％の範囲が好ましい。Component (A), which is the main component of the present invention, is T
iB2, CrB2, VB2, TaB2, NbB2, Mn
B2, MoB2, HfB2, YB2, AlB2, MgB
Diborides such as 2, metal pentaborides such as W2B5, Mo2B5, or TiB, CrB, VB, TaB
, NbB, MnB, MoB, HfB, WB, FeB, and the like. The metal boride as component (A) is preferably in a range of 20 to 88% by weight based on the total amount.
【０００８】次に、（Ｂ） 成分として用いられる単斜
晶 ＺｒＯ２の添加量は、１０〜５０重量％の範囲が好
ましい。
本発明の材料の（Ｃ） 成分として添加配合される立方
晶系炭窒化物はＴｉ（Ｃ，Ｎ） が適当である。この炭
窒化チタンは、全重量に対し２〜７０重量％の範囲で添
加することが必要である。この範囲を逸脱すると燒結が
困難になったり、得られる燒結体の機械的物性の改善が
困難になる。
このような本発明のセラミックス材料によれば、２５０
℃で ２００ｈ 加熱しても劣化現象がなく、熱的特
性が著しく改善される。Next, the amount of monoclinic ZrO2 used as component (B) is preferably in the range of 10 to 50% by weight. The cubic carbonitride added as component (C) of the material of the present invention is suitably Ti(C,N). This titanium carbonitride needs to be added in an amount of 2 to 70% by weight based on the total weight. If it deviates from this range, sintering becomes difficult and it becomes difficult to improve the mechanical properties of the obtained sintered body. According to such a ceramic material of the present invention, 250
There is no deterioration phenomenon even when heated at ℃ for 200 hours, and the thermal properties are significantly improved.
【０００９】本発明のセラミックス材料は、原料混合物
を造粒の後、金型成形やラバープレスで成形し、そのの
ち、真空、不活性ガスあるいは還元性ガス、窒素ガス等
の雰囲気で、１４００〜１７００℃で３０〜１２０ｍｉ
ｎ加熱することにより、緻密な燒結体が得られる。また
、その後 ＨＩＰ処理したり、あるいは真空燒結の代わ
りにホットプレスを使用することもできる。このように
して、耐摩材や切削工具材として好適な金属ホウ化物基
セラミックスが得られる。The ceramic material of the present invention is produced by granulating the raw material mixture, molding it with a mold or rubber press, and then heating it in a vacuum, an atmosphere of an inert gas, a reducing gas, nitrogen gas, etc. 30~120mi at 1700℃
By heating, a dense sintered body can be obtained. It is also possible to perform a subsequent HIP treatment, or to use a hot press instead of vacuum sintering. In this way, a metal boride-based ceramic suitable as a wear-resistant material or a cutting tool material is obtained.
【００１０】0010
【実施例】粒子径を４μｍ以下に分級したＴｉＢ２とＴ
ｉ（Ｃ，Ｎ）および単斜晶ＺｒＯ２を、それぞれ４０：
３０：３０の重量割合で混合し、この混合粉末を成形し
て、１６００℃で６０ｍｉｎ 真空ホットプレスした。
得られた燒結体の物性を調べたところ、抗折力７００Ｍ
Ｐａ、ビッカース硬度Ｈｖ１６５０、インデンテーショ
ン法ＫＩＣ ７．５ＭＰａｍ１／２という物性を有して
いた。
また、組織観察では空隙は皆無であった。この試料は
２５０℃に ３００ｈ 大気中で加熱しても、クラック
の発生が見られなかった。[Example] TiB2 and T classified to particle diameters of 4 μm or less
i(C,N) and monoclinic ZrO2 at 40:
They were mixed at a weight ratio of 30:30, and the mixed powder was molded and vacuum hot pressed at 1600° C. for 60 minutes. When the physical properties of the obtained sintered body were investigated, it was found that the transverse rupture strength was 700M.
It had physical properties of Pa, Vickers hardness Hv1650, and indentation method KIC 7.5 MPam1/2. Furthermore, microscopic observation revealed that there were no voids. This sample is
Even when heated to 250°C for 300 hours in the air, no cracks were observed.
【００１１】その他の実施例を表１に示す。表中のＮＯ
． に付した＊は、比較例であることを示す。Other examples are shown in Table 1. NO in the table
．． The asterisk (*) indicates that it is a comparative example.
【表１】[Table 1]
【００１２】0012
【発明の効果】このような本発明によれば、２００ ℃
以上に加熱される耐摩工具や切削工具として広範囲に使
用できるような機械的熱的性質を有する金属ホウ化物基
セラミックス燒結体を得ることができる。[Effects of the Invention] According to the present invention, 200°C
It is possible to obtain a metal boride-based ceramic sintered body having mechanical and thermal properties that can be used in a wide range of applications as wear-resistant tools and cutting tools that are heated in the above manner.
Claims (1)
化物の１種以上と、全量当り１０〜５０重量％の単斜晶
酸化ジルコニウムの粉末を基本成分とし、これにＴｉ（
Ｃ，Ｎ） を２〜７０重量％添加した混合粉末を成形、
燒結してなる高靭性ホウ化物−酸化ジルコニウム−炭窒
化チタン系セラミックス材料。Claim 1: The basic components are 20 to 88% by weight of one or more metal borides and 10 to 50% by weight of monoclinic zirconium oxide powder based on the total amount, and Ti(
A mixed powder containing 2 to 70% by weight of C, N) is molded,
High toughness boride-zirconium oxide-titanium carbonitride ceramic material made by sintering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3145511A JPH0725591B2 (en) | 1991-05-20 | 1991-05-20 | High toughness boride-zirconium oxide-titanium carbonitride ceramic materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3145511A JPH0725591B2 (en) | 1991-05-20 | 1991-05-20 | High toughness boride-zirconium oxide-titanium carbonitride ceramic materials |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04342472A true JPH04342472A (en) | 1992-11-27 |
| JPH0725591B2 JPH0725591B2 (en) | 1995-03-22 |
Family
ID=15386938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3145511A Expired - Lifetime JPH0725591B2 (en) | 1991-05-20 | 1991-05-20 | High toughness boride-zirconium oxide-titanium carbonitride ceramic materials |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0725591B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04304904A (en) * | 1991-03-29 | 1992-10-28 | Mitsubishi Materials Corp | Cutting tool made of titanium carbonitride group ceramics excellent in wear resistance |
-
1991
- 1991-05-20 JP JP3145511A patent/JPH0725591B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04304904A (en) * | 1991-03-29 | 1992-10-28 | Mitsubishi Materials Corp | Cutting tool made of titanium carbonitride group ceramics excellent in wear resistance |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0725591B2 (en) | 1995-03-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |