JPH01290555A - Alumina sintered composite material and its production - Google Patents
Alumina sintered composite material and its productionInfo
- Publication number
- JPH01290555A JPH01290555A JP63120194A JP12019488A JPH01290555A JP H01290555 A JPH01290555 A JP H01290555A JP 63120194 A JP63120194 A JP 63120194A JP 12019488 A JP12019488 A JP 12019488A JP H01290555 A JPH01290555 A JP H01290555A
- Authority
- JP
- Japan
- Prior art keywords
- alumina
- silicon carbide
- zirconia
- carbide whiskers
- fine particles
- 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
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 239000002131 composite material Substances 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 56
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical class [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000010419 fine particle Substances 0.000 claims abstract description 21
- 239000010409 thin film Substances 0.000 claims abstract description 20
- 229910002077 partially stabilized zirconia Inorganic materials 0.000 claims abstract description 17
- 239000011347 resin Substances 0.000 claims abstract description 17
- 229920005989 resin Polymers 0.000 claims abstract description 17
- 239000011159 matrix material Substances 0.000 claims abstract description 16
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 238000001035 drying Methods 0.000 claims abstract description 3
- 238000001914 filtration Methods 0.000 claims abstract description 3
- 238000010304 firing Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 abstract description 8
- 239000010408 film Substances 0.000 abstract description 3
- 238000001354 calcination Methods 0.000 abstract 1
- 239000006185 dispersion Substances 0.000 abstract 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 239000005011 phenolic resin Substances 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011812 mixed powder Substances 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003125 aqueous solvent Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- RUDFQVOCFDJEEF-UHFFFAOYSA-N yttrium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、耐摩耗性が要求される工具あるいは機械部材
などに有用な高強度、高靭性を備える複合系アルミナ焼
結体とその製造方法に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a composite alumina sintered body with high strength and high toughness useful for tools or machine parts that require wear resistance, and a method for manufacturing the same. Regarding.
近時、セラミックス材料で作成した切削工具の性能評価
が畜まってきており、とくにアルミナを主体とした組成
の焼結体が注目されている。なかでも高強度と高靭性を
併有する特性を示すのが、アルミナ−ジルコニア−炭化
珪素ウィスカーの複合系焼結体である。例えば、特開昭
６１−２７０２６６号公報には、アルミナに対し平均０
．１〜１゜０μｍの部分安定化ジルコニアを５〜５Ｑｖ
ｏ１％と直径１μｍ以下、アスペクト比３〜２００の炭
化珪素ウィスカーを配合した組成の高強度、高硬度の複
合焼結体が開示されている。In recent years, performance evaluations of cutting tools made from ceramic materials have been gaining momentum, and sintered bodies with a composition mainly composed of alumina are attracting particular attention. Among them, a composite sintered body of alumina-zirconia-silicon carbide whiskers exhibits characteristics of both high strength and high toughness. For example, in Japanese Patent Application Laid-Open No. 61-270266, an average of 0
．． 5-5 Qv of partially stabilized zirconia of 1-1°0 μm
A high-strength, high-hardness composite sintered body having a composition containing silicon carbide whiskers having a diameter of 1 μm or less and an aspect ratio of 3 to 200 is disclosed.
このアルミナ−ジルコニア−炭化珪素ウィスカー１．・
らなる焼結体の組織を観察すると主成分アルミナ中にジ
ルコニア粒子と炭化珪素ウィスカーが分散した状態を呈
している。このうちジルコニア粒子は応力変態を起こす
正方品であり、炭化珪素ウィスカーとマトリックスであ
るアルミナとが強固に結合している。このような結合状
態において焼結体の高強度と高靭性をもたらす要因とな
るのは、正方晶ジルコニアの単斜晶への相変態と、炭化
珪素ウィスカーの高応力レベル下での引き抜けである。This alumina-zirconia-silicon carbide whisker 1.・
When observing the structure of the sintered body, it is found that zirconia particles and silicon carbide whiskers are dispersed in alumina, the main component. Among these, zirconia particles are square particles that undergo stress transformation, and silicon carbide whiskers and alumina, which is a matrix, are strongly bonded. The factors contributing to the high strength and toughness of the sintered body in this bonded state are the phase transformation of tetragonal zirconia to monoclinic and the pull-out of silicon carbide whiskers under high stress levels. .
このうち、正方晶のジルコニアについては原料のジルコ
ニア粒子に３ｍｏ １％程度のイツトリアを添加するこ
とによって容易に形成することができるが、炭化珪素ウ
ィスカーの高応力レベル下での引き抜けを生じさせるこ
とは甚だ困難である。Among these, tetragonal zirconia can be easily formed by adding about 3 mo 1% ittria to the raw zirconia particles, but this may cause the silicon carbide whiskers to pull out under high stress levels. is extremely difficult.
この改善策として、炭化珪素ウィスカーの表面ＣＶＣ法
により炭素を被覆してからアルミナと複合する方法が提
案されている（第２５回窯業基礎討論会講演要旨集、第
４１頁）が、炭素被覆層の１ｉｔｔｌが４５０人と厚い
うえに不均一であるため、低応力レベルにおいて引き抜
けが生じ、かえって強度および破壊靭性が減退する結果
を招く。As an improvement measure, a method has been proposed in which the surface of silicon carbide whiskers is coated with carbon using the CVC method and then composited with alumina (25th Ceramic Industry Basics Conference Lecture Abstracts, p. 41). Since the thickness of 1 ittl is as thick as 450 mm and is non-uniform, pull-out occurs at low stress levels, resulting in a decrease in strength and fracture toughness.
出願人は、従来技術が直面する問題点の解消を図るため
、炭化珪素ウィスカーの表面に単分子膜程度の炭素質Ｆ
ｉｔ膜を形成被着したのちセラミックス粉末と混合し、
不活性雰囲気もしくは真空中で焼結する方法をすでに開
発した（特願昭６２−１５７５２０）。この方法によれ
ば、炭素質薄膜の介在作用によりウィスカーの引き抜は
効果が生じ、かなり破壊靭性の向上を図ることができる
が、未だ十分とはいえない。In order to solve the problems faced by the prior art, the applicant has applied a monomolecular film of carbonaceous F to the surface of silicon carbide whiskers.
After forming and depositing the IT film, it is mixed with ceramic powder,
A method of sintering in an inert atmosphere or vacuum has already been developed (Japanese Patent Application No. 157520/1982). According to this method, the whisker is effectively pulled out by the intervening action of the carbonaceous thin film, and the fracture toughness can be considerably improved, but it is still not sufficient.
本発明は上記の先行技術に改良を重ね、高応力レベル下
での引き抜は現象が発現しうる卓越した強度ならびに靭
性をもつ複合系アルミナ焼結体とその製造方法を提供す
るものである。The present invention improves on the prior art described above and provides a composite alumina sintered body having excellent strength and toughness that can be pulled out under high stress levels, and a method for producing the same.
すなわち、本発明により提供される複合系アルミナ焼結
体は、表面に炭素質薄膜を介して部分安定化ジルコニア
の微粒子を固定した炭化珪素ウィスカーをアルミナもし
くはアルミナとジルコニアからなるマトリックス中に分
散した組織構造をもつのである。That is, the composite alumina sintered body provided by the present invention has a structure in which silicon carbide whiskers, on which fine particles of partially stabilized zirconia are fixed via a carbonaceous thin film, are dispersed in alumina or a matrix consisting of alumina and zirconia. It has a structure.
炭化珪素ウィスカーの表面に被着される炭素質薄膜は１
０〜５０人の極めて薄い層で、部分安定化ジルコニアは
この層によって炭化珪素ウィスカーの表面に点在的に固
定されている。そして、炭素質薄膜によりジルコニア微
粒子を固定した炭化珪素ウィスカーがアルミナもしくは
アルミナとジルコニアとからなるマトリックス中に均質
に分散した組織構造を呈している。The carbonaceous thin film deposited on the surface of silicon carbide whiskers is 1
In an extremely thin layer of 0 to 50 people, partially stabilized zirconia is dottedly fixed on the surface of the silicon carbide whiskers by this layer. The silicon carbide whiskers to which zirconia fine particles are fixed by a carbonaceous thin film are homogeneously dispersed in a matrix made of alumina or alumina and zirconia.
このような組織構造の複合系アルミナ焼結体は、熱硬化
性樹脂溶液に炭化珪素ウィスカーと部分安定化ジルコニ
アの微粒子を分散させ、濾過、乾燥および加熱して樹脂
成分を硬化したのち、非酸化雰囲気中で８００〜１２０
０℃に焼成処理して樹脂成分を炭素質薄膜に転化し、得
られた炭素質薄膜によりジルコニア微粒子を固定した炭
化珪素ウィスカーをアルミナもしくはアルミナとジルコ
ニアからなるマトリックスと均一混合して焼結すること
によって製造することができる。A composite alumina sintered body with such a structure is produced by dispersing silicon carbide whiskers and partially stabilized zirconia fine particles in a thermosetting resin solution, filtering, drying, and heating to harden the resin component. 800-120 in atmosphere
The resin component is converted into a carbonaceous thin film by baking at 0°C, and silicon carbide whiskers with zirconia fine particles fixed by the obtained carbonaceous thin film are homogeneously mixed with alumina or a matrix consisting of alumina and zirconia, and then sintered. It can be manufactured by
まず、熱硬化性樹脂を有機溶媒に溶解して濃度０．５％
以下の希薄溶液を調整する。熱硬化性樹脂としては、炭
化率の大きいフェノール系やフラン系の樹脂が好ましく
用いられる。また、有機溶媒は常用のエタノール、アセ
トン、ベンゼンあるいはトルエンなどでよい。First, dissolve the thermosetting resin in an organic solvent to a concentration of 0.5%.
Prepare the following dilute solution. As the thermosetting resin, phenol-based or furan-based resins having a high carbonization rate are preferably used. Further, the organic solvent may be commonly used ethanol, acetone, benzene or toluene.
この熱硬化性樹脂溶液に炭化珪素ウィスカーとジルコニ
ア微粒子の所定量を添加し、均一に混合する。炭化珪素
ウィスカーには、通常、直径０．１〜１．０μｍ１長さ
３０〜１００μｍの性状のものが用いられ、一方、ジル
コニア微粒子としては、粒径０．０１〜０．５μｍの部
分安定化（イツトリア添加）ジルコニアが適用される。A predetermined amount of silicon carbide whiskers and zirconia fine particles are added to this thermosetting resin solution and mixed uniformly. Silicon carbide whiskers usually have a diameter of 0.1 to 1.0 μm and a length of 30 to 100 μm, while zirconia fine particles are partially stabilized (with a particle size of 0.01 to 0.5 μm). Ittria-added) zirconia is applied.
炭化珪素ウィスカーと部分安定化ジルコニア微粒子を分
散した熱硬化性樹脂溶液は、濾過、乾燥して有機溶媒を
除去し、引き続き加熱して樹脂成分を硬化したのち、窒
素、アルゴンのような非酸化雰囲気中で８００〜１２０
０℃の温度で焼成処理して樹脂成分を炭素質薄膜に転化
する。この段階で、部分安定化ジルコニア微粒子は１０
〜５０人程度の炭素質薄膜を介して炭化珪素ウイスカー
の表面に点在的に固定される。The thermosetting resin solution in which silicon carbide whiskers and partially stabilized zirconia fine particles are dispersed is filtered and dried to remove the organic solvent, then heated to harden the resin component, and then heated in a non-oxidizing atmosphere such as nitrogen or argon. 800-120 inside
A firing treatment is performed at a temperature of 0° C. to convert the resin component into a carbonaceous thin film. At this stage, the partially stabilized zirconia fine particles are 10
It is dottedly fixed on the surface of silicon carbide whiskers via a carbonaceous thin film of about 50 to 50 ml.
このようにして得られた炭素質薄膜によりジルコニア微
粒子を固定した炭化珪素ウィスカーは、アルミナもしく
はアルミナとジルコニアからなるマトリックスと均一混
合したのち焼結する。この場合の望ましい配合組成（重
量比率）は、アルミナ５０〜８０％、ジルコニア０〜２
０％、ジルコニア微粒子を固定した炭化珪素ウィスカー
１５〜４０％である。また焼結は、温度１４００〜１８
００℃１加圧力１００〜５００ｋｇ／ｃＪの条件による
ホントプレス焼結でおこなうことが適切である。The silicon carbide whiskers having zirconia fine particles fixed thereon by the carbonaceous thin film thus obtained are sintered after being uniformly mixed with alumina or a matrix consisting of alumina and zirconia. In this case, the desirable blending composition (weight ratio) is 50-80% alumina, 0-2% zirconia.
0%, and 15 to 40% silicon carbide whiskers to which zirconia fine particles are fixed. Also, sintering is performed at a temperature of 1400 to 18
It is appropriate to perform true press sintering under the conditions of 00° C. and a pressure of 100 to 500 kg/cJ.
〔作用）
上記の製造方法で得られた本発明の複合系アルミナ焼結
体は、表面に部分安定化ジルコニアが１０〜２０人の極
めて薄い炭素質薄膜により点在的に固定した炭化珪素ウ
ィスカーが、アルミナもしくはアルミナとジルコニアか
らなるマトリックス中に均質に分散した組織構造を備え
ている。したがって、この複合系アルミナ焼結体に外力
が加わった際には、次ぎのような独特の機能が発揮され
炭化珪素ウィスカー表面に点在する部分安定化ジルコニ
アが正方品から単斜晶へ相変態し、応力を緩和する作用
をなす。その結果、炭化珪素ウィスカーとマトリックス
との境界で大きな塑性域が生しることになり、さらに強
い力が付加された場合、すなわち破壊時には、炭化珪素
ウィスカーの表面近傍は著しい歪みを起こし、非常に高
い応カレヘルで炭化珪素ウィスカーの引き抜けが生しる
。[Function] The composite alumina sintered body of the present invention obtained by the above manufacturing method has silicon carbide whiskers dotted with 10 to 20 partially stabilized zirconia particles fixed on the surface by an extremely thin carbonaceous thin film. , has a homogeneous structure in a matrix of alumina or alumina and zirconia. Therefore, when an external force is applied to this composite alumina sintered body, the following unique functions are exhibited, and the partially stabilized zirconia scattered on the surface of the silicon carbide whiskers undergoes a phase transformation from a tetragonal to a monoclinic crystal. and has the effect of relieving stress. As a result, a large plastic region is generated at the boundary between the silicon carbide whiskers and the matrix, and when a stronger force is applied, that is, at the time of fracture, the vicinity of the surface of the silicon carbide whiskers undergoes significant distortion and becomes extremely The silicon carbide whisker pulls out due to high resistance.
本発明に係る複合系アルミナ焼結体は、このような機構
に基づいて高応力レベル下での引き抜は現象を実現する
ことができ、これが高強度と高靭性を併有させる要因と
なる。Based on such a mechanism, the composite alumina sintered body according to the present invention can achieve the phenomenon of drawing under a high stress level, which is a factor in having both high strength and high toughness.
フェノール樹脂〔群栄化学（株）製、レジトップＰＧＡ
−４５０８）１５ｇをエタノール５０００ ｍｆｌに溶
解して濃度０．３％の溶液を作成し、７日間静置してフ
ェノール樹脂の高分子鎖をエタノール溶媒中に均一に分
散させた。Phenol resin [manufactured by Gunei Chemical Co., Ltd., Resitop PGA
-4508) was dissolved in 5000 mfl of ethanol to create a solution with a concentration of 0.3%, and left to stand for 7 days to uniformly disperse the polymer chains of the phenolic resin in the ethanol solvent.
この熱硬化性樹脂溶液に０．１ｇｍ、長さ３０〜１００
μｍの性状を有する炭化珪素ウィスカー３００ｇと平均
０．１μｍの部分安定化ジルコニア（イツトリア３％入
り）７００ｇを添加し、撹拌混合して十分に分散させた
のち、濾過、風乾してエタノールを揮散除去した。0.1 gm in this thermosetting resin solution, length 30-100
Add 300g of silicon carbide whiskers with micrometer properties and 700g of partially stabilized zirconia (containing 3% yttria) with an average diameter of 0.1μm, stir and mix to thoroughly disperse, filter, and air dry to remove ethanol by volatilization. did.
上記の操作により炭化珪素ウィスカーの表面には、１５
０ｇのジルコニア微粒子と２．０ｇのフェノール樹脂が
付着した。By the above operation, the surface of silicon carbide whiskers has 15
0 g of zirconia fine particles and 2.0 g of phenol resin were attached.
ついで、１７０℃で２時間加熱してフェノール樹脂成分
を硬化したのち、高周波炉に移し、アルゴンガス雰囲気
中１０００℃の温度で４時間に亘り焼成処理を施した。Next, the phenol resin component was cured by heating at 170° C. for 2 hours, and then transferred to a high frequency furnace and fired at a temperature of 1000° C. for 4 hours in an argon gas atmosphere.
炭化処理後のウィスカー表面を走査型電子ｎｌ微鏡によ
り観察したところ、炭化珪素ウィスカーの表面に約１５
人厚の炭素質薄膜を介してジルコニア微粒子がコブのよ
うに点在固定していた。When the whisker surface after carbonization treatment was observed using a scanning electron NL microscope, it was found that about 15
Zirconia fine particles were scattered and fixed like bumps through a human-thick carbonaceous thin film.
上記のようにして炭素質薄膜でジルコニア微粒子を固定
した炭化珪素ウィスカーを平均粒径０．２μｍのマトリ
ックス・アルミナ粉末（α−Ａ１□０、）に３５重量％
の割合で配合し、水溶媒を用い２４時間ボールミルで混
和し、さらに濾過、乾燥して均質な混合粉末を得た。こ
の混合粉末を真空中で、温度１６００℃１加圧力３０Ｍ
Ｐａの条件でホットプレス焼結して、直径５０祁、厚さ
５叩の複合系アルミナ焼結体を製造した。35% by weight of silicon carbide whiskers with zirconia fine particles fixed with a carbonaceous thin film as described above are added to matrix alumina powder (α-A1□0,) with an average particle size of 0.2 μm.
The mixture was mixed in a ball mill for 24 hours using an aqueous solvent, and then filtered and dried to obtain a homogeneous mixed powder. This mixed powder was heated in a vacuum at a temperature of 1600℃ and a pressure of 30M.
A composite alumina sintered body having a diameter of 50 mm and a thickness of 5 mm was produced by hot press sintering under Pa conditions.
このようにして製造された複合系アルミナ焼結体は、図
に模式的に示したように表面に部分安定化ジルコニア微
粉末１が炭素質薄膜２により点在的に固定した炭化珪素
ウィスカー３がアルミナ・マトリックス４中に均質に分
散した組織構造を呈している。As schematically shown in the figure, the composite alumina sintered body thus produced has silicon carbide whiskers 3 on the surface of which partially stabilized zirconia fine powder 1 is dotted and fixed by a carbonaceous thin film 2. It exhibits a homogeneously dispersed texture in the alumina matrix 4.
本実施例で得られた複合系アルミナ焼結体の各種特性を
測定し、表に示した。Various properties of the composite alumina sintered body obtained in this example were measured and shown in the table.
なお、実施例と同一のアルミナ・マトリックス単味によ
るアルミナ焼結体（比較例１）、および部分安定化ジル
コニア微粒子を分散しないほかは実施例と同様にして製
造した複合系アルミナ焼結体（比較例２）の特性も表に
併載した。In addition, an alumina sintered body made of the same alumina matrix as in the example (Comparative example 1), and a composite alumina sintered body manufactured in the same manner as in the example except that partially stabilized zirconia fine particles were not dispersed (comparative example 1) The characteristics of Example 2) are also listed in the table.
本発明の実施例は、比較例に比べ強度及び破壊靭性とも
に増大していることが認められる。It is recognized that the examples of the present invention have increased strength and fracture toughness compared to the comparative examples.
本発明によれば、極めて高強度および高靭性を備える複
合系アルミナ焼結体を提供することができるから、耐摩
耗性が要求される工具あるいは機械部材などの用途に有
用である。According to the present invention, it is possible to provide a composite alumina sintered body having extremely high strength and toughness, and therefore it is useful for applications such as tools and mechanical parts that require wear resistance.
図は、本発明の実施例による複合系アルミナ焼結体の組
繊構造を模式的に示した説明図である。
ｌ・・・部分安定化ジルコニア微粒子
２・・・炭素質薄膜
３・・・炭化珪素ウィスカー
４ ・・アルミナ・マトリックス
特許出願人 東海カーボン株式会社
代理人 弁理士 高 畑 正 也The figure is an explanatory diagram schematically showing the fiber structure of a composite alumina sintered body according to an example of the present invention. l... Partially stabilized zirconia fine particles 2... Carbonaceous thin film 3... Silicon carbide whiskers 4... Alumina matrix patent applicant Tokai Carbon Co., Ltd. agent Patent attorney Masaya Takahata
Claims (2)
微粒子を固定した炭化珪素ウィスカーをアルミナとジル
コニアからなるマトリックス中に分散した組織構造をも
つ複合系アルミナ焼結体。1. A composite alumina sintered body with a microstructure in which silicon carbide whiskers, on which fine particles of partially stabilized zirconia are fixed via a carbonaceous thin film, are dispersed in a matrix consisting of alumina and zirconia.
化ジルコニアの微粒子を分散させ、濾過、乾燥および加
熱して樹脂成分を硬化したのち、非酸化雰囲気中で８０
０〜１２００℃に焼成処理して樹脂成分を炭素質薄膜に
転化し、得られた炭素質薄膜によりジルコニア微粒子を
固定した炭化珪素ウィスカーをアルミナもしくはアルミ
ナとジルコニアからなるマトリックスと均一混合して焼
結することを特徴とする複合系アルミナ焼結体の製造方
法。2. Silicon carbide whiskers and partially stabilized zirconia fine particles are dispersed in a thermosetting resin solution, and the resin component is cured by filtration, drying, and heating.
The resin component is converted into a carbonaceous thin film by firing at 0 to 1200°C, and silicon carbide whiskers with zirconia fine particles fixed in the resulting carbonaceous thin film are homogeneously mixed with alumina or a matrix consisting of alumina and zirconia, and then sintered. A method for producing a composite alumina sintered body, characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63120194A JPH01290555A (en) | 1988-05-17 | 1988-05-17 | Alumina sintered composite material and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63120194A JPH01290555A (en) | 1988-05-17 | 1988-05-17 | Alumina sintered composite material and its production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01290555A true JPH01290555A (en) | 1989-11-22 |
| JPH0543659B2 JPH0543659B2 (en) | 1993-07-02 |
Family
ID=14780239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63120194A Granted JPH01290555A (en) | 1988-05-17 | 1988-05-17 | Alumina sintered composite material and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01290555A (en) |
-
1988
- 1988-05-17 JP JP63120194A patent/JPH01290555A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0543659B2 (en) | 1993-07-02 |
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