JPH01183460A - Production of sintered ceramic material - Google Patents
Production of sintered ceramic materialInfo
- Publication number
- JPH01183460A JPH01183460A JP63004709A JP470988A JPH01183460A JP H01183460 A JPH01183460 A JP H01183460A JP 63004709 A JP63004709 A JP 63004709A JP 470988 A JP470988 A JP 470988A JP H01183460 A JPH01183460 A JP H01183460A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- weight
- alumina
- average particle
- particle diameter
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 229910010293 ceramic material Inorganic materials 0.000 title 1
- 239000000843 powder Substances 0.000 claims abstract description 40
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 12
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 13
- 239000000919 ceramic Substances 0.000 claims description 8
- 238000001513 hot isostatic pressing Methods 0.000 claims description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 2
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 2
- 239000002245 particle Substances 0.000 abstract description 7
- 238000005245 sintering Methods 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 3
- 230000001590 oxidative effect Effects 0.000 abstract description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 abstract 4
- 230000002706 hydrostatic effect Effects 0.000 abstract 2
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 11
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 9
- 229910052863 mullite Inorganic materials 0.000 description 9
- 239000000203 mixture Substances 0.000 description 7
- 239000002131 composite material Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000002156 mixing Methods 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000000280 densification Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000001272 pressureless sintering Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910003320 CeOx Inorganic materials 0.000 description 1
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 1
- SMZOGRDCAXLAAR-UHFFFAOYSA-N aluminium isopropoxide Chemical compound [Al+3].CC(C)[O-].CC(C)[O-].CC(C)[O-] SMZOGRDCAXLAAR-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010405 reoxidation reaction Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/48—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates
- C04B35/481—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates containing silicon, e.g. zircon
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
- C04B35/18—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay rich in aluminium oxide
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/64—Burning or sintering processes
- C04B35/645—Pressure sintering
- C04B35/6455—Hot isostatic pressing
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Inorganic Chemistry (AREA)
- Composite Materials (AREA)
- Ceramic Products (AREA)
Abstract
Description
【発明の詳細な説明】
〔イ、産業上の利用分野〕
本発明は主にムライト、炭化けい素および酸化ジルコニ
ウムからなる複合セラミックス焼結体の製造方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION [A. Field of Industrial Application] The present invention mainly relates to a method for manufacturing a composite ceramic sintered body consisting of mullite, silicon carbide and zirconium oxide.
従来からムライト（３＾ＪｔＯｓ・２ＳｉＯｔ）および
炭化けい素（ＳｉＣ）からなる２組成複合セラミックス
は知られており、その焼結体は耐熱性、耐食性さらには
耐摩耗性、硬度等、優れている点が多いことから、構造
材料として、またエンジン部品、バーナーノズル部品等
、高温部品用材料としてその利用が試みられつつある。Two-component composite ceramics consisting of mullite (3^JtOs/2SiOt) and silicon carbide (SiC) have been known for a long time, and their sintered bodies have excellent heat resistance, corrosion resistance, wear resistance, hardness, etc. Because of its large number of points, attempts are being made to use it as a structural material and as a material for high-temperature parts such as engine parts and burner nozzle parts.
しかしながら、上記２組成複合セラミックス焼結体は強
度において難点があった。そこで強度改善のために最近
組成や製法についていくつかの提案がなされた。However, the two-component composite ceramic sintered body has a drawback in strength. Therefore, several proposals regarding composition and manufacturing methods have recently been made to improve strength.
たとえば、一つはムライトとアルカリガラスの混合物に
水、ＳｉＣウィスカーを加え、攪拌してスラリーとし、
このスラリーを乾燥し、造粒したのちホットプレス焼結
させてつくるムライト−ガラス−５ｉＣ複合セラミック
ス焼結体がそれであり（特開昭６２−１７６９６４）
、もう一つは、本願発明者らが提案したアルミナ・シリ
カ系粉末２５〜９２重量％、ＳｉＣ粉末５〜５０重量％
、およびＺｒＯ，粉末３〜３７重量％からなる混合物を
成形し、常圧焼結してつくるムライト−５ｉＣ−ＺｒＯ
，複合セラミックス焼結体がそれである（特願昭６２−
２７８４０５）。For example, one is to add water and SiC whiskers to a mixture of mullite and alkali glass and stir to form a slurry.
This slurry is dried, granulated, and then hot-press sintered to produce a mullite-glass-5iC composite ceramic sintered body (Japanese Unexamined Patent Publication No. 176964/1983).
, the other is alumina-silica powder 25-92% by weight and SiC powder 5-50% by weight proposed by the inventors of the present application.
Mullite-5iC-ZrO is produced by molding a mixture consisting of 3 to 37% by weight of ZrO powder and sintering it under pressure.
, a composite ceramic sintered body (Patent application 1986-
278405).
〔ハ１発明が解決しようとする問題点〕前記従来法によ
って得た焼結体の強度は、大巾に改善され、いずれも所
期の目的は一応達成された。[C1. Problems to be Solved by the Invention] The strength of the sintered body obtained by the above-mentioned conventional method has been greatly improved, and the intended objectives have been achieved to a certain extent.
しかしながら、これら焼結体をエンジニアリング部材と
して摺動部位などに使用した場合、その破壊靭性が低い
ために、傷ができ、それが原因となって、部材に多数の
マイクロクランクを発生させ破壊に到ることもしばしば
であった。そのため、従来法の焼結体でつくられた部材
は、その用途が著しく限定され、また寿命を短かくして
いた。However, when these sintered bodies are used as engineering components in sliding parts, their low fracture toughness causes scratches, which can cause numerous microcranks to occur in the component, leading to fracture. This was often the case. Therefore, members made from sintered bodies using conventional methods have extremely limited uses and shortened lifespans.
〔二１問題点を解決するための手段〕
そこで本発明者らは焼結体の破壊靭性（以下ＫＩＣと云
う）を改善することを目的として鋭意研究した結果、ム
ライトを含むアルミナ・シリカ系粉末、ＳｉＣ粉末およ
びＺｒ０ｚ粉末を特定配合してつくった常圧焼結体をさ
らに熱間静水圧プレス（以下、ＨＩＰと云う）すること
により、著しくＫ＋ｃが改善されることを知見して、本
発明を完成させた。[Means for Solving Problem 21] Therefore, as a result of intensive research aimed at improving the fracture toughness (hereinafter referred to as KIC) of sintered bodies, the present inventors have developed an alumina-silica powder containing mullite. The present invention was based on the discovery that K+c was significantly improved by further hot isostatic pressing (hereinafter referred to as HIP) a pressureless sintered body made with a specific blend of SiC powder and Zr0z powder. completed.
すなわち、本発明は、アルミナ・シリカ系粉末１５〜９
２重量％、ＳｉＣ粉末５〜５０重量％およびＺｒＯ，粉
末１〜６２重量％からなる混合原料を酸処理してつくる
セラミックス焼結体の製造方法を要旨とするものである
。That is, the present invention provides alumina-silica powders 15 to 9
The gist of this invention is a method for producing a ceramic sintered body by acid-treating a mixed raw material consisting of 2% by weight of SiC powder, 5 to 50% by weight of SiC powder, and 1 to 62% by weight of ZrO powder.
以下、本発明の詳細な説明する。The present invention will be explained in detail below.
まず使用原料について説明する。First, the raw materials used will be explained.
アルミナ・シリカ系粉末とは例えばムライト単味かある
いは、ムライトとＡｌｔＣｈおよび／またはＳｉｎｇと
の共存物であり、化学的にはＡＩＺＯ３と５ｉｆｔとか
らなる。再酸化物の割合は本発明では特に限定するもの
ではないが、好ましいのはＡ Ｉ ｇｏ３が６０〜８６
重量％、ＳｉＯ□が４０〜１４重量％であり、これら範
囲外でもＫＩＣの改善効果は多少見られるが、強度低下
、クリープの増大などが見られ、その点で焼結体の用途
制限を受ける。なお、該粉末がアルカリ金属酸化物など
の不純物を含むと高温強度を低下させるので、できるだ
け少ない方が望ましい。The alumina-silica powder is, for example, mullite alone or a coexistence of mullite and AltCh and/or Sing, and chemically consists of AIZO3 and 5ift. The ratio of reoxidation is not particularly limited in the present invention, but it is preferable that A I go3 is 60 to 86.
Weight%, SiO□ is 40 to 14% by weight, and although some improvement in KIC can be seen even outside these ranges, there is a decrease in strength and an increase in creep, which limits the use of the sintered body. . Note that if the powder contains impurities such as alkali metal oxides, the high-temperature strength will be lowered, so it is desirable that the amount be as small as possible.
アルミナ・シリカ系粉末の細かさは平均粒子径１μｍ以
下のものを用いるのが望ましく、それ以上では焼結性が
悪くなり、ＫＩＣも低下傾向になるので望ましくない。As for the fineness of the alumina-silica powder, it is preferable to use one having an average particle diameter of 1 μm or less; if it is larger than that, the sinterability will deteriorate and the KIC will also tend to decrease, which is not desirable.
ＳｉＣ粉末は、焼結の際緻密化を妨げる作用があるため
、できるだけ細かいものを用いるのが望ましく、平均粒
子径が１μｍ以下のものを用いるのが好ましい。また不
純物が多いと複合体組織に局部的に固溶し組織を乱し、
粒成長を促進して強度を低下させるため、できるだけ高
純度のものが良い。Since SiC powder has the effect of hindering densification during sintering, it is desirable to use as fine a powder as possible, and it is preferable to use one with an average particle diameter of 1 μm or less. In addition, if there are many impurities, they will dissolve locally in the composite structure and disturb the structure.
Since it promotes grain growth and reduces strength, it is best to use it as highly pure as possible.
ＺｒＯ，粉末は、Ｚｒ０１や、安定化Ｚｒ０ｇ、部分安
定化Ｚｒ（ｈ （安定化剤ＹｚＯｓ＋ ＣｅＯｘ＋ Ｍ
ｇＯ，Ｃａｂ）いずれも用いる事ができ、るが、焼結を
均一に促進させるためには、細かい粒子を広く分散させ
た方が良いため、平均粒子径１μｍ以下のものを用いる
のが好ましい。ZrO, powder is Zr01, stabilized Zr0g, partially stabilized Zr(h (stabilizer YzOs + CeOx + M
(gO, Cab) can be used, but in order to uniformly promote sintering, it is better to widely disperse fine particles, so it is preferable to use those with an average particle diameter of 1 μm or less.
次に、使用原料の配合割合について述べる。Next, the blending ratio of the raw materials used will be described.
使用原料の配合において、アルミナ・シリカ系粉末、お
よびＺｒ０１粉末がそれぞれ、１５重量％および１重量
％未満であると、焼結による緻密化が低いため、またＳ
ｉＣ粉末が５重量％未満だとその配合量が少な過ぎるた
め、いずれの場合においてもＫＩＣ改善の効果がほとん
どない、アルミナ・シフリカ系粉末が９２重量％を超え
た場合もＩ（ｗｅの改善が見られない、 ＳｉＣ粉末が
５０重量％を超えると、常圧焼結して得た焼結体には多
数の開気孔を有しているため、またＺｒＯ，粉末が６２
重量％を超えると常圧焼結後の冷却時に転移による体積
変化から焼結体に無数のクランクが発生するため、ＨＩ
Ｐ処理をしてもＫＩＣの向上は見られない。In the blending of the raw materials used, if the alumina-silica powder and Zr01 powder are less than 15% by weight and 1% by weight, respectively, densification due to sintering will be low, and S
If the amount of iC powder is less than 5% by weight, the blended amount is too small, so there is almost no effect of improving KIC in any case. If the SiC powder exceeds 50% by weight, the sintered body obtained by pressureless sintering will have many open pores, and the
If the weight percentage exceeds HI, numerous cranks will occur in the sintered body due to volume changes due to transition during cooling after pressureless sintering.
No improvement in KIC was observed even after P treatment.
使用原料の好ましい配合割合はアルミナ・シリカ系粉末
１５〜６３重量％、ＳｉＣ粉末２３〜５０重量％および
ＺｒＯ□粉末８〜５５重量％である。The preferred blending ratios of the raw materials used are 15 to 63% by weight of alumina-silica powder, 23 to 50% by weight of SiC powder, and 8 to 55% by weight of ZrO□ powder.
以上説明した原料およびその配合割合に基づいた配合物
を慣用の方法（乾式、湿式いずれでもよい）で混合し、
成形しくたとえば、加圧成形、押出成形など）、得られ
た成形体を、必要に応じて乾燥したのち、１６００〜１
７５０℃で常圧焼結する。Mixing the ingredients based on the raw materials and their blending ratios explained above by a conventional method (either dry or wet),
After molding (for example, pressure molding, extrusion molding, etc.) and drying the obtained molded product as necessary,
Sinter under normal pressure at 750°C.
得られた常圧焼結体をＨＩＰ処理することが本発明にお
いて重要である。It is important in the present invention to subject the obtained pressureless sintered body to HIP treatment.
ＨＩＰ処理はＮ！ｌ Ａｒなどの非酸化雰囲気のもとて
１５００〜１８００℃、２００ ｋｇｆ／ｃｊ以上の条
件で行なうのが好ましい。１５００℃未満あるいは２０
０ｋｇｆ／ｄ未満ではＨＩＰによる焼結が進行せず、Ｋ
ＩＣの改善も見られず、また温度が１８００．℃を超え
ると、アルミナ・シリカ系粉末中のムライトが分解し、
焼結体が脆弱となるのでいずれも好ましくない。HIP processing is N! It is preferable to carry out the process under conditions of 1500 to 1800° C. and 200 kgf/cj or more in a non-oxidizing atmosphere such as Ar. Less than 1500℃ or 20
Below 0 kgf/d, sintering by HIP does not proceed, and K
There was no improvement in the IC, and the temperature was 1800. When the temperature exceeds ℃, the mullite in the alumina-silica powder decomposes,
Both are unfavorable because the sintered body becomes brittle.
なお、圧力の上限は、経済性、装置の安全性等から２０
００ｋｇｆ／−以下で行なうのが望ましい。Note that the upper limit of the pressure is 20% due to economic efficiency, equipment safety, etc.
It is desirable to carry out the test at 00 kgf/- or less.
以下、本発明を実施例に基づいて説明する。Hereinafter, the present invention will be explained based on examples.
実施例１〜１９、比較例１〜４ まず下記の要領で各原料をそろえた。 Examples 1 to 19, Comparative Examples 1 to 4 First, each raw material was prepared in the following manner.
アルミニウムイソプロポキシドとエチルシリケートとを
Ａ’ｚＯｓ／ＳｉＯ□重量比が表１に示す割合になるよ
うに配合し水を加えて混合し、生成した沈殿を濾過し乾
燥したのち、１３５０℃、１時間仮焼し、粉砕し、５種
類のＡ’ ｚＯｚ／ ５ｉｎ２重量比の異なるムライト
を含むアルミナ・シリカ系粉末（平均粒子径０．２μｍ
）を準備した。Aluminum isopropoxide and ethyl silicate were blended so that the A'zOs/SiO□ weight ratio was as shown in Table 1, water was added and mixed, the resulting precipitate was filtered and dried, and then heated at 1350°C for 1 hour. Alumina-silica powder (average particle size 0.2μm) containing 5 types of mullite with different weight ratios of A'zOz/5in2
) was prepared.
ＳｉＣ粉末およびＺｒＯ□粉末はいずれも市販品を用い
た。Both SiC powder and ZrO□ powder were commercially available products.
上記原料を表１に示す割合に配合し、得られた各配合物
を〆ットミルに投入し、３２時間湿式混合してスラリー
をつくったφ
そのスラリーを２００℃のスプレードライヤーで乾燥し
、得られた乾燥粉末を静水圧プレス法で５Ｘ４ＸＱ、５
ｃｍの成形体を各配合物につき２箇ずつ作製した。The above raw materials were blended in the proportions shown in Table 1, each of the resulting blends was put into a hot mill, and mixed wet for 32 hours to create a slurry. The slurry was dried with a spray dryer at 200°C to obtain the The dried powder was 5X4XQ, 5
Two molded bodies of cm were produced for each formulation.
各成形体は詰め粉（ＳｉＣ粉末）で覆い、１７００℃、
２時間、大気中で常圧焼結した。得られた常圧焼結体の
うち１箇はＩＭ法（Ｉｎｄｅｎｔａｔｉｏｎ Ｍｉｃｒ
ｏ −ｃｒａｃｋ Ｍｅｔｈｏｄ）でＫＩＣを測定し、
結果を表１に記載した。Each molded body was covered with packing powder (SiC powder) and heated to 1700°C.
Normal pressure sintering was carried out in the atmosphere for 2 hours. One of the obtained pressureless sintered bodies was manufactured using the IM method (Indentation Micro
o -crack Method) to measure KIC,
The results are shown in Table 1.
他の１箇はＡｒ雰囲気、１６００℃、１５００１ｑｒｆ
／ａＪ、２時間ＨＩＰ処理した。The other one is Ar atmosphere, 1600℃, 15001qrf
/aJ, HIP treatment was performed for 2 hours.
得たＨＩＰ処理体は前記ＩＭ法でＫＩｃを測定し、その
結果を同表に併記した。The KIc of the obtained HIP-treated body was measured by the above-mentioned IM method, and the results are also shown in the same table.
〔ホ０発明の効果〕
本発明はムライトを含むアルミナ・シリカ系粉末、Ｓｉ
Ｃ粉末およびＺｒＯ□粉末を特定配合した混合原料を常
圧焼結後、ＨＩＰ処理するセラミックス焼結体の製法で
あり、単に常圧焼結しただけの従来法による焼結体より
破壊靭性値が格段に優れた焼結体が得られ、該焼結体の
用途が著しく拡大できる。[Effects of the invention] The present invention provides alumina-silica powder containing mullite, Si
This is a method for manufacturing ceramic sintered bodies in which a mixed raw material containing a specific blend of C powder and ZrO□ powder is sintered under pressure and then subjected to HIP treatment, and the fracture toughness value is higher than that of the sintered bodies produced by the conventional method, which is simply sintered under pressure. A significantly superior sintered body can be obtained, and the uses of the sintered body can be significantly expanded.
特許出願人 日本セメント株式会社Patent applicant: Nippon Cement Co., Ltd.
Claims (1)
素粉末５〜５０重量％および酸化ジルコニウム粉末１〜
６２重量％からなる混合原料を成形し、常圧焼結したの
ち、熱間静水圧プレス処理するセラミックス焼結体の製
造方法。Alumina/silica powder 15-92% by weight, silicon carbide powder 5-50% by weight, and zirconium oxide powder 1-1% by weight
A method for producing a ceramic sintered body, in which a mixed raw material containing 62% by weight is molded, pressureless sintered, and then subjected to hot isostatic pressing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63004709A JPH01183460A (en) | 1988-01-14 | 1988-01-14 | Production of sintered ceramic material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63004709A JPH01183460A (en) | 1988-01-14 | 1988-01-14 | Production of sintered ceramic material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01183460A true JPH01183460A (en) | 1989-07-21 |
Family
ID=11591412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63004709A Pending JPH01183460A (en) | 1988-01-14 | 1988-01-14 | Production of sintered ceramic material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01183460A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH062231A (en) * | 1992-06-11 | 1994-01-11 | Maruu Seitoushiyo:Kk | Yarn guide and its production |
| EP1771266A1 (en) * | 2004-06-16 | 2007-04-11 | Nucor Corporation | Zirconia refractories for making steel |
| US10994234B2 (en) | 2016-07-25 | 2021-05-04 | Jinan Shengquan Doublesurplus Ceramic Filter Co., Ltd. | Ceramic foam filter and manufacturing method thereof |
-
1988
- 1988-01-14 JP JP63004709A patent/JPH01183460A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH062231A (en) * | 1992-06-11 | 1994-01-11 | Maruu Seitoushiyo:Kk | Yarn guide and its production |
| EP1771266A1 (en) * | 2004-06-16 | 2007-04-11 | Nucor Corporation | Zirconia refractories for making steel |
| EP1771266A4 (en) * | 2004-06-16 | 2007-09-26 | Nucor Corp | Zirconia refractories for making steel |
| US10994234B2 (en) | 2016-07-25 | 2021-05-04 | Jinan Shengquan Doublesurplus Ceramic Filter Co., Ltd. | Ceramic foam filter and manufacturing method thereof |
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