JPH0220191Y2 - - Google Patents
Info
- Publication number
- JPH0220191Y2 JPH0220191Y2 JP1985094450U JP9445085U JPH0220191Y2 JP H0220191 Y2 JPH0220191 Y2 JP H0220191Y2 JP 1985094450 U JP1985094450 U JP 1985094450U JP 9445085 U JP9445085 U JP 9445085U JP H0220191 Y2 JPH0220191 Y2 JP H0220191Y2
- Authority
- JP
- Japan
- Prior art keywords
- sic
- porous
- sio
- ceramic body
- coating
- 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
- 239000000919 ceramic Substances 0.000 claims description 12
- 239000002131 composite material Substances 0.000 claims description 10
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 239000002344 surface layer Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000000969 carrier Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000003733 fiber-reinforced composite Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
Description
【考案の詳細な説明】
〔産業状の利用分野〕
この考案は、高度の耐熱耐食性と強化組織を有
する複合構造の多孔質セラミツク体に関する。[Detailed description of the invention] [Industrial field of application] This invention relates to a porous ceramic body with a composite structure having high heat and corrosion resistance and a reinforced structure.
多孔質のセラミツク体は、高温で使用される
材、断熱材あるいは触媒キヤリヤーなどの用途に
有用されている。このうち、SiCを構成材質とす
るものは腐食性を伴う高熱環境においても安定し
て使用できるため、実用性の期待も極めて大き
い。
Porous ceramic bodies are useful in applications such as high temperature materials, insulation materials, or catalyst carriers. Among these, those whose constituent material is SiC can be used stably even in corrosive, high-temperature environments, so they have high expectations for practical use.
しかしながら、SiC粉粒体の焼結により形成さ
れている従来のSiC系多孔質セラミツク体は骨格
相互の結合接点が小さいため、機械的強度が十分
に上らない問題点があつた。 However, conventional SiC-based porous ceramic bodies formed by sintering SiC powder have had the problem of insufficient mechanical strength because the bonding points between the skeletons are small.
この考案は、上記従来のSiC系多孔質セラミツ
ク体が抱える強度的な問題点を解消し、組織構造
面から効果的な改善を図つたものである。
This idea solves the strength problems of the conventional SiC-based porous ceramic bodies and effectively improves the structure.
すなわち、この考案は多孔質セラミツク体の組
織を改質して、骨格をSiCウイスカーにより構成
しその表層部をSiO2被膜で一体結合した複合構
造としたものである。
That is, this idea modifies the structure of a porous ceramic body to create a composite structure in which the skeleton is composed of SiC whiskers and the surface layer is integrally bonded with a SiO 2 coating.
この考案による複合構造は卓越した強度ならび
に耐熱安定性を有するSiCウイスカーを骨格と
し、これを表層部に密着形成した耐熱耐食性能に
優れるSiO2被膜により一体に結合した多孔質組
織を備えており、あらゆる使用目的に対して抜群
の強化作用が発揮される。
The composite structure based on this idea has a porous structure that uses SiC whiskers, which have excellent strength and heat resistance stability, as a skeleton, and is bonded together by a SiO 2 coating that has excellent heat and corrosion resistance properties and is closely formed on the surface layer. It has an outstanding strengthening effect for all purposes.
以下、この考案を図示の実施例に基づいて説明
する。
This invention will be explained below based on illustrated embodiments.
第１図はこの考案を示す外観斜視図で、１は円
盤形の多孔質複合セラミツク体である。この多孔
質複合セラミツク体１の組織構造を拡大したのが
第２図で、２は骨格を構成するSiCウイスカー、
３はSiO2被膜、そして４は多孔質を形成する気
孔部分である。 FIG. 1 is an external perspective view showing this invention, and 1 is a disc-shaped porous composite ceramic body. Figure 2 shows an enlarged view of the organizational structure of this porous composite ceramic body 1, in which 2 shows the SiC whiskers constituting the skeleton;
3 is a SiO 2 coating, and 4 is a pore portion forming a porous structure.
骨格となるSiCウイスカー２は、直径0.1〜
1.0μm、長さ50〜200μmのアスペクト性状と、密
度3.19ｇ／cm3、引張り強さ300〜1400Kg／mm2、引
張り弾性率40〜70t／mm2耐熱度1600℃（空気中）
の物理特性を有するβ−SiCの針状単結晶であ
る。SiCウイスカー２は無方向に集合した形態で
骨格組織を構成しており、その表層部に密着生成
したSiO2被膜３によるウイスカー相互の連結機
能を介して組織内部に無数の気孔部分４を形成し
た状態で一体強固に結合する。 The SiC whisker 2 serving as the skeleton has a diameter of 0.1~
Aspect properties of 1.0μm, length 50-200μm, density 3.19g/cm 3 , tensile strength 300-1400Kg/mm 2 , tensile modulus 40-70t/mm 2 Heat resistance 1600℃ (in air)
It is a needle-shaped single crystal of β-SiC with the physical properties of SiC whiskers 2 constitute a skeletal tissue in the form of non-directional aggregation, and countless pores 4 are formed inside the tissue through the interconnection function of the whiskers by the SiO 2 coating 3 formed in close contact with the surface layer. It is firmly connected as one body.
上記の多孔質複合セラミツク体は、次のように
して形成することができる。まずSiCウイスカー
を水または有機溶媒に分散したのち過して、骨
格成形体となるSiCウイスカー集合ケークを得
る。この集合ケークはSiCウイスカーが無方向に
配向し、極めて良好な通気性をもつ均質多孔質組
織を呈する。ついで、この集合ケークを酸化雰囲
気中900〜1800℃の温度で焼成し、SiCウイスカ
ー骨格面にSiO2被膜を酸化生成する。生成した
SiO2被膜は骨格SiCウイスカーを連続的に融着結
合して強度性能に優れた多孔質組織構造を付与す
る。 The above porous composite ceramic body can be formed as follows. First, SiC whiskers are dispersed in water or an organic solvent and then filtered to obtain a SiC whisker aggregate cake that becomes a skeleton molded body. This aggregate cake has SiC whiskers oriented in no direction and exhibits a homogeneous porous structure with extremely good air permeability. Next, this aggregate cake is fired at a temperature of 900 to 1800° C. in an oxidizing atmosphere to oxidize and generate a SiO 2 film on the SiC whisker skeleton surface. generated
The SiO 2 coating continuously fuses and bonds skeletal SiC whiskers to provide a porous structure with excellent strength performance.
この考案の多孔質複合セラミツク体は、耐熱耐
食性の良好なSiC−SiO2系の材料で構成されてお
り、その組織構造はSiCウイスカーによる繊維強
化複合体となつているため極めて高い強度特性を
有する。したがつて、高熱で腐食性を伴う苛酷環
境下に使用される材、断熱材、触媒キヤリヤー
等に好適である。
The porous composite ceramic body of this invention is composed of a SiC-SiO 2 material with good heat and corrosion resistance, and its structure is a fiber-reinforced composite made of SiC whiskers, so it has extremely high strength characteristics. . Therefore, it is suitable for materials used in harsh environments with high heat and corrosive properties, heat insulating materials, catalyst carriers, and the like.
第１図はこの考案の多孔質複合セラミツク体を
示した外観斜視図、第２図は第１図の組織構造の
部分拡大図である。
１……多孔質複合セラミツク体、２……SiCウ
イスカー、３……SiO2被膜、４……気孔部分。
FIG. 1 is an external perspective view showing the porous composite ceramic body of this invention, and FIG. 2 is a partially enlarged view of the organizational structure of FIG. 1. 1... Porous composite ceramic body, 2... SiC whiskers, 3... SiO 2 coating, 4... Pore portion.
Claims (1)
がSiO2被膜により一体的に結合した構造の多孔
質複合セラミツク体。 A porous composite ceramic body whose skeleton is composed of SiC whiskers and whose surface layer is integrally bonded by a SiO 2 coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985094450U JPH0220191Y2 (en) | 1985-06-24 | 1985-06-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985094450U JPH0220191Y2 (en) | 1985-06-24 | 1985-06-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS623544U JPS623544U (en) | 1987-01-10 |
| JPH0220191Y2 true JPH0220191Y2 (en) | 1990-06-01 |
Family
ID=30652988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985094450U Expired JPH0220191Y2 (en) | 1985-06-24 | 1985-06-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0220191Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5891061A (en) * | 1981-11-26 | 1983-05-30 | 旭硝子株式会社 | Silicon carbide ceramics |
-
1985
- 1985-06-24 JP JP1985094450U patent/JPH0220191Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5891061A (en) * | 1981-11-26 | 1983-05-30 | 旭硝子株式会社 | Silicon carbide ceramics |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS623544U (en) | 1987-01-10 |
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