JPH085719B2 - Fiber reinforced ceramic material - Google Patents
Fiber reinforced ceramic materialInfo
- Publication number
- JPH085719B2 JPH085719B2 JP61200133A JP20013386A JPH085719B2 JP H085719 B2 JPH085719 B2 JP H085719B2 JP 61200133 A JP61200133 A JP 61200133A JP 20013386 A JP20013386 A JP 20013386A JP H085719 B2 JPH085719 B2 JP H085719B2
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- ceramic material
- reinforced ceramic
- inorganic binder
- fibers
- 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 - Lifetime
Links
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- Glass Compositions (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Ceramic Products (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は繊維強化セラミック材料に関し、詳しくは、
炭化ケイ素繊維等のセラミック繊維の織布または不織布
とコロイダルシリカ等の無機バインダーとを複合化する
ことにより、強度、耐熱性、耐熱衝撃性等の特性を向上
させた繊維強化セラミック材料に関する。TECHNICAL FIELD The present invention relates to a fiber reinforced ceramic material, and more specifically,
The present invention relates to a fiber-reinforced ceramic material having improved properties such as strength, heat resistance, and thermal shock resistance by combining a woven or non-woven fabric of ceramic fibers such as silicon carbide fibers and an inorganic binder such as colloidal silica.
［従来の技術およびその問題点］ 一般に、耐熱性材料としてセラミック材料が使用され
ている。しかしながら、これらのセラミック材料は耐熱
衝撃性に劣り、400℃/hrのサーマルショックで破壊する
といわれている。また、セラミック材料は構造材として
用いられる程の靱性を有していない。[Prior Art and its Problems] Generally, a ceramic material is used as a heat resistant material. However, these ceramic materials have poor thermal shock resistance and are said to be destroyed by a thermal shock of 400 ° C / hr. Further, the ceramic material does not have toughness enough to be used as a structural material.
このセラミック材料は脆性材料なのでクラックが発生
し易く、しかもこのクラック拡大し易いという欠点を有
する。Since this ceramic material is a brittle material, it has a drawback that cracks easily occur and the cracks easily expand.
さらに、セラミック材料の製造は、一般に高温、高圧
で成形するため装置が大規模となり、かつ成形も難し
く、その割に小型のセラミック材料しか製造できないと
いう問題点を有する。Further, in the production of ceramic materials, there is a problem that the apparatus is generally large in size because it is formed at a high temperature and a high pressure, and the forming is difficult, so that only small ceramic materials can be produced.
［発明の目的］ 本発明の目的は、上記の問題点に鑑みなされたもの
で、常温に近い温度で成形、硬化が可能な無機バインダ
ーと、耐熱性に優れたセラミック繊維とを複合化するこ
とにより、耐熱性や耐熱衝撃性等の諸特性に優れ、しか
も軽量な繊維強化セラミック材料を簡便に提供すること
にある。[Object of the Invention] An object of the present invention is to solve the above problems, and to combine an inorganic binder that can be molded and cured at a temperature close to room temperature with a ceramic fiber having excellent heat resistance. Therefore, it is possible to simply provide a lightweight fiber-reinforced ceramic material having excellent properties such as heat resistance and thermal shock resistance.
［問題を解決するための手段および作用］ 本発明者らは、上記の目的を達成するために鋭意研究
を重ねた結果、炭化ケイ素繊維等のセラミック繊維の織
布等と、無機バインダーとを複合化することにより、強
度、耐熱性、耐熱衝撃性に優れた繊維強化セラミック材
料が得られるという知見を得て本発明に至った。[Means and Actions for Solving Problems] As a result of intensive studies to achieve the above-mentioned object, the inventors of the present invention have combined a woven fabric of ceramic fibers such as silicon carbide fibers with an inorganic binder. The present invention has been completed based on the finding that a fiber-reinforced ceramic material excellent in strength, heat resistance, and thermal shock resistance can be obtained by the conversion.
すなわち本発明は、セラミック繊維の織布または不織
布に無機バインダーを塗布または含浸した後、常温で賦
形し、次いで加熱硬化、焼成して得られる繊維強化セラ
ミック材料にある。That is, the present invention is a fiber-reinforced ceramic material obtained by applying or impregnating a woven or non-woven fabric of ceramic fibers with an inorganic binder, shaping the mixture at room temperature, and then heat-curing and firing it.
本発明において用いられるセラミック繊維としては、
炭化ケイ素（SiC）繊維、アルミナ（Al2O3）繊維、窒化
ケイ素（Si3N4）繊維、マグネシア（MgO）繊維等が例示
されるが、特に耐熱性や強度に優れた炭化ケイ素繊維が
好ましい。The ceramic fiber used in the present invention,
Silicon carbide (SiC) fiber, alumina (Al 2 O 3 ) fiber, silicon nitride (Si 3 N 4 ) fiber, magnesia (MgO) fiber and the like are exemplified, but silicon carbide fiber particularly excellent in heat resistance and strength is used. preferable.
また、本発明で用いるセラミック繊維は、織布または
不織布として用いられ、これら織布または不織布の代わ
りに、ウィスカー、クロス、フェルト、チョップ、スト
ランド、トウ、マット、編織物、引揃え品等の任意の形
状または形態のものを用いることもできる。Further, the ceramic fiber used in the present invention is used as a woven fabric or a non-woven fabric, and in place of the woven fabric or the non-woven fabric, any of whiskers, cloths, felts, chops, strands, tows, mats, knitted fabrics, drawn products, etc. It is also possible to use those of the shape or form.
一方、本発明で用いられる無機バインダー、即ちマト
リックスとしては、コロイダルシリカ、リン酸アルミニ
ウム、ホウ酸等が挙げられるが、特にコロイダルシリカ
に粒径20〜30μの結晶質シリカを分散させたペースト状
液、またはコロイダルシリカにSiC、Si3N4、Al2O3、Al2
O3・P2O5等を分散させたスラリー状液が好ましく用いら
れる。On the other hand, as the inorganic binder used in the present invention, that is, the matrix, colloidal silica, aluminum phosphate, boric acid and the like can be mentioned, in particular a paste-like liquid in which crystalline silica having a particle size of 20 to 30μ is dispersed in colloidal silica , Or colloidal silica with SiC, Si 3 N 4 , Al 2 O 3 , and Al 2
A slurry-like liquid in which O 3 · P 2 O 5 and the like are dispersed is preferably used.
この無機バインダーとセラミックス繊維とを含浸させ
る方法としては、例えば無機バインダー溶液を刷毛や機
械等によりセラミック繊維に塗布するか、またはセラミ
ック繊維に無機バインダー溶液を含浸すること等によっ
てなされる。As a method of impregnating the inorganic binder and the ceramic fiber, for example, the inorganic binder solution is applied to the ceramic fiber by a brush or a machine, or the ceramic fiber is impregnated with the inorganic binder solution.
セラミック繊維を無機バインダーに塗布または含浸し
た後、任意の形状に賦形する。この賦形方法としては、
無機バインダーは常温で樹脂液状であるため、繊維強化
プラスチック（FRP）成形体を製造する場合と同様な方
法で、積層等によって簡単に各種の形状のものに賦形す
ることができる。すなわち、セラミック繊維と無機バイ
ンダーをハンドレイアップで作ることにより、種々の形
状の成形体が得られる。After applying or impregnating the ceramic fiber with the inorganic binder, it is shaped into an arbitrary shape. As this shaping method,
Since the inorganic binder is a liquid resin at room temperature, it can be easily formed into various shapes by lamination or the like in the same manner as in the case of producing a fiber reinforced plastic (FRP) molded body. That is, molded bodies of various shapes can be obtained by making the ceramic fiber and the inorganic binder by hand layup.
この種々の形状の成形体を加熱硬化、加工することに
よって繊維強化セラミック材料が得られる。この加熱硬
化温度は任意であるが、200℃程度で硬化を完了させ、
そのまま使用する炉内において使用温度まで徐々に昇温
し使用することもできる。また、焼成手段や加工手段
は、従来公知の手段が適宜採用される。A fiber-reinforced ceramic material can be obtained by heat-curing and processing the molded bodies of various shapes. This heating and curing temperature is arbitrary, but the curing is completed at about 200 ° C,
It is also possible to gradually raise the temperature to the use temperature and use it in the furnace that is used as it is. Further, conventionally known means are appropriately adopted as the firing means and the processing means.
このようにして得られた本発明の繊維強化セラミック
材料は、約1000℃／分程度の熱衝撃を与えても破壊せ
ず、また炭化ケイ素繊維の耐熱温度は1250℃であるが、
得られた繊維強化セラミック材料は酸化雰囲気中1300℃
でもその形状を保持することができる。The fiber-reinforced ceramic material of the present invention thus obtained does not break even when subjected to a thermal shock of about 1000 ° C./minute, and the heat resistant temperature of the silicon carbide fiber is 1250 ° C.
The obtained fiber reinforced ceramic material is 1300 ° C in an oxidizing atmosphere.
However, the shape can be retained.
この本発明の繊維強化セラミック材料は、上記したよ
うに、耐熱性や耐熱衝撃性に優れていると共に、軽量で
あることから、電炉用エコノマイザー（電炉で使われる
炉蓋材）、石英管代替パイプ、高温炉内搬送用平板、電
縫管製造用インピーダー等に応用される。As described above, the fiber-reinforced ceramic material of the present invention is excellent in heat resistance and thermal shock resistance and is lightweight, so that it is an economizer for electric furnaces (furnace lid material used in electric furnaces) and a quartz tube substitute. It is applied to pipes, flat plates for transportation in high temperature furnaces, impeders for manufacturing ERW pipes, etc.
［実施例］ 以下、本発明を実施例に基づき具体的に説明する。[Examples] Hereinafter, the present invention will be specifically described based on Examples.
実施例１ 炭化ケイ素繊維（日本カーボン（株）製、商品名：ニ
カロン）からなる織布に、無機バインダーとして、コロ
イダルシリカに粒径20〜30μの結晶質シリカを分散させ
たペースト状液を刷毛塗りにより塗布し、これを成形、
焼成して織布成形体（繊維強化セラミック材料）を製造
した。Example 1 A woven cloth made of silicon carbide fiber (manufactured by Nippon Carbon Co., Ltd., trade name: Nicalon) was brushed with a liquid paste in which crystalline silica having a particle size of 20 to 30 μ was dispersed in colloidal silica as an inorganic binder. Apply by coating, shape this,
Firing was performed to produce a woven fabric formed body (fiber reinforced ceramic material).
得られた織布成形体の繊維体積含有率（Vf値）は30
％、常温曲げ強度は15kg/mm2、800℃熱処理後の曲げ強
度は約6kg/mm2であった。また、この織布成形体は、130
0℃の酸化雰囲気に晒しても形状を保持した。さらにこ
の織布成形体をバーナーで加熱後水冷したが、クラック
の発生、変形および破壊を起こさず、1400℃の焼成炉か
ら室温に一気に取り出しても破壊しなかった。The fiber volume content (Vf value) of the obtained woven fabric formed body is 30.
%, The bending strength at room temperature was 15 kg / mm 2 , and the bending strength after heat treatment at 800 ° C. was about 6 kg / mm 2 . In addition, this woven fabric molded body is
It retained its shape even when exposed to an oxidizing atmosphere at 0 ° C. Furthermore, this woven fabric molded body was heated with a burner and then cooled with water, but it did not cause cracking, deformation or destruction, and did not break even if taken out from the firing furnace at 1400 ° C to room temperature all at once.
実施例２ 実施例１で得られた織布成形体（繊維強化セラミック
材料）を用いて800φ×450φ×150tの電炉用エコノマイ
ザー（電気炉で使用される炉蓋材）を試作した。得られ
たエコノマイザーの重量はわずか5.5kgであり、従来の
エコノマイザーの重量が150kgであることから、その重
量を約27分の１に軽量化できた。Example 2 Using the woven fabric formed body (fiber-reinforced ceramic material) obtained in Example 1, an 800φ × 450φ × 150t economizer for an electric furnace (furnace lid material used in an electric furnace) was prototyped. The weight of the obtained economizer was only 5.5 kg, and the weight of the conventional economizer was 150 kg, so that the weight could be reduced to about 1/27.
実施例３ 実施例１で得られた織布成形体（繊維強化セラミック
材料）を用いて、石英管代替用パイプを作成した。得ら
れた石英管代替用パイプは、ハンドリング時に落下させ
り、急激な熱衝撃を与えても破損しなかった。このよう
に、本発明の繊維強化セラミック材料は、石英と同等ま
たはそれ以上の強度を有し、かつ石英をはるかに凌ぐ耐
熱衝撃性を有する。Example 3 Using the woven fabric formed body (fiber-reinforced ceramic material) obtained in Example 1, a quartz tube substitute pipe was prepared. The obtained quartz pipe replacement pipe did not break even when dropped during handling and subjected to a rapid thermal shock. As described above, the fiber-reinforced ceramic material of the present invention has strength equal to or higher than that of quartz and has thermal shock resistance far superior to that of quartz.
実施例４ 実施例１で得られた織布成形体（繊維強化セラミック
材料）を用いて、高温炉内搬送用平板を作成した。得ら
れた高温炉内搬送用平板は、1000℃、SO2、SO3ガス存在
下で１カ月腐食試験を実施したが、変形、重量減少、強
度の劣化はみられなかった。Example 4 Using the woven fabric formed body (fiber reinforced ceramic material) obtained in Example 1, a flat plate for carrying in a high temperature furnace was prepared. The obtained flat plate for transportation in a high temperature furnace was subjected to a corrosion test for 1 month in the presence of SO 2 and SO 3 gas at 1000 ° C., but no deformation, reduction in weight or deterioration of strength was observed.
［発明の効果］ 以上説明したように、炭化ケイ素繊維等のセラミック
繊維の織布または不織布に、無機バインダーを塗布また
は含浸した後、常温で賦形し、次いで加熱硬化、焼成し
て得られる本発明の繊維強化セラミック材料は、耐熱衝
撃性や耐熱性に優れると共に、軽量であり、しかも大
型、異形の製品を簡便に作成することができる。EFFECTS OF THE INVENTION As described above, a woven or non-woven fabric of ceramic fibers such as silicon carbide fibers is coated or impregnated with an inorganic binder, shaped at room temperature, and then heat-cured and fired to obtain a book. INDUSTRIAL APPLICABILITY The fiber-reinforced ceramic material of the present invention is excellent in thermal shock resistance and heat resistance, is lightweight, and is capable of easily producing large-sized and irregular-shaped products.
従って、本発明の繊維強化セラミック材料は、広範な
用途に使用可能である。Therefore, the fiber-reinforced ceramic material of the present invention can be used in a wide variety of applications.
Claims (3)
バインダーを塗布または含浸した後、常温で賦形し、次
いで加熱硬化、焼成して得られる繊維強化セラミック材
料。1. A fiber-reinforced ceramic material obtained by coating or impregnating a woven or non-woven fabric of ceramic fibers with an inorganic binder, shaping the mixture at room temperature, and then heat-curing and firing.
アルミナ繊維、窒化ケイ素繊維、マグネシア繊維から選
択される特許請求の範囲第１項記載の繊維強化セラミッ
ク材料。2. The ceramic fiber is silicon carbide fiber,
The fiber-reinforced ceramic material according to claim 1, which is selected from alumina fibers, silicon nitride fibers, and magnesia fibers.
カ、リン酸アルミニウム、ホウ酸、該コロイダルシリカ
に粒径20〜30μの結晶質シリカを分散させたペースト状
液、あるいは該コロイダルシリカにSiC、Si3N4、Al
2O3、Al2O3・P2O5のいずれかを分散させたスラリー状液
から選択される特許請求の範囲第１項または第２項記載
の繊維強化セラミック材料。3. The inorganic binder is colloidal silica, aluminum phosphate, boric acid, a paste liquid in which crystalline silica having a particle size of 20 to 30 μ is dispersed in the colloidal silica, or SiC or Si 3 in the colloidal silica. N 4 , Al
The fiber-reinforced ceramic material according to claim 1 or 2, which is selected from a slurry liquid in which any of 2 O 3 and Al 2 O 3 .P 2 O 5 is dispersed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61200133A JPH085719B2 (en) | 1986-08-28 | 1986-08-28 | Fiber reinforced ceramic material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61200133A JPH085719B2 (en) | 1986-08-28 | 1986-08-28 | Fiber reinforced ceramic material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6360169A JPS6360169A (en) | 1988-03-16 |
| JPH085719B2 true JPH085719B2 (en) | 1996-01-24 |
Family
ID=16419347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61200133A Expired - Lifetime JPH085719B2 (en) | 1986-08-28 | 1986-08-28 | Fiber reinforced ceramic material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH085719B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5599647B2 (en) * | 2010-04-30 | 2014-10-01 | グンゼ株式会社 | Silicon carbide composites reinforced with circular knitted crystalline silicon carbide fiber structures |
-
1986
- 1986-08-28 JP JP61200133A patent/JPH085719B2/en not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| 浜野健也編「ファインセラミックスハンドブック」朝倉書店（１９８４−１２−２０）Ｐ．２２９−２３１ |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6360169A (en) | 1988-03-16 |
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