Application of Tungsten in Polycarbosilane Derived Ceramics

Xie Zhengfang Chen Zhaohui Li Yongqing Zheng Wenwei Hu Haifeng Xiao Jiaoyu

doi:10.15980/j.tzzz.2000.01.001

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Application of Tungsten in Polycarbosilane Derived Ceramics
Issue 1, Pages: 1-3(2000)
Published： 2000 ，
DOI： 10.15980/j.tzzz.2000.01.001

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[1]谢征芳,陈朝辉,李永清,郑文伟,胡海峰,肖加余.活性填料钨在聚碳硅烷转化陶瓷中的应用[J].特种铸造及有色合金,2000(01):1-3.

Xie Zhengfang Chen Zhaohui Li Yongqing Zheng Wenwei Hu Haifeng Xiao Jiaoyu. Application of Tungsten in Polycarbosilane Derived Ceramics. [J]. Special Casting & Nonferrous Alloys (1):1-3(2000)
[1]谢征芳,陈朝辉,李永清,郑文伟,胡海峰,肖加余.活性填料钨在聚碳硅烷转化陶瓷中的应用[J].特种铸造及有色合金,2000(01):1-3. DOI： 10.15980/j.tzzz.2000.01.001.

Xie Zhengfang Chen Zhaohui Li Yongqing Zheng Wenwei Hu Haifeng Xiao Jiaoyu. Application of Tungsten in Polycarbosilane Derived Ceramics. [J]. Special Casting & Nonferrous Alloys (1):1-3(2000) DOI： 10.15980/j.tzzz.2000.01.001.

摘要

研究了活性填料钨（Ｗ）在聚碳硅烷（ＰＣＳ）先驱体转化陶瓷中的应用。研究表明，Ｗ能有效降低陶瓷素坯的气孔率。Ｗ可与ＰＣＳ气态裂解产物、游离碳和Ｎ

２

气氛反应生成新的化合物，提高ＰＣＳ的陶瓷产率。Ｗ还能提高烧成体的强度。当■（Ｗ）＝１５％时，烧成体的三点弯曲强度为１０１ＭＰａ，为不含活性填料的陶瓷烧成体的１．５倍。但是在先驱体中引入Ｗ不能抑制坯体在裂解过程中的收缩。Ｗ含量越高，陶瓷烧成体的线收缩越大。

Abstract

The application of tungsten （W）in polycarbosilane （PCS）derived ceramics was investigated. The results showed that W could decrease efficiently the porosity of the green compact. W could react with gas volatile of PCS during pyrolysis

free carbon and N

to produce new compounds

which increased ceramic yield of PCS. W enhanced the three-point bending strength of the resulted ceramic with a strength of 101 MPa when the volume ration of 9（W） was 15 %

which was 1. 5 times of that of where W was excluded. However

W couldn’t restrain the linear shrinkage of the green compact during pyrolysis. The linear shrinkage was higher with increasing the volume ration of （W）.