SYNTHESIS OF SiC CERAMICS BY PYROLYSIS OF ELECTRON BEAM IRRADIATED POLYCARBOSILANE Ⅰ.PYROLYSIS OF POLYCARBOSILANE IRRADIATED IN AIR

Xu Yunshu; Song Yongcai; Fu Yibei; Huang Ruiliang

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SYNTHESIS OF SiC CERAMICS BY PYROLYSIS OF ELECTRON BEAM IRRADIATED POLYCARBOSILANE Ⅰ.PYROLYSIS OF POLYCARBOSILANE IRRADIATED IN AIR

更新时间：2023-04-18

- SYNTHESIS OF SiC CERAMICS BY PYROLYSIS OF ELECTRON BEAM IRRADIATED POLYCARBOSILANE Ⅰ.PYROLYSIS OF POLYCARBOSILANE IRRADIATED IN AIR
- Journal of Radiation Research and Radiation Processing Vol. 16, Issue 1, Pages: 1-4(1998)
- 作者机构：
  
  1.中国工程物理研究院核物理与化学研究所　成都　610003
  1.国防科技大学五系　长沙　410073
- 作者简介：
- 基金信息：
  
  The Science Foundation of Chinese Academy of Engineering Physics
- DOI：
  CLC：
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Xu Yunshu, Song Yongcai, Fu Yibei, et al. SYNTHESIS OF SiC CERAMICS BY PYROLYSIS OF ELECTRON BEAM IRRADIATED POLYCARBOSILANE Ⅰ.PYROLYSIS OF POLYCARBOSILANE IRRADIATED IN AIR. [J]. Journal of Radiation Research and Radiation Processing 16(1):1-4(1998)
DOI：

Xu Yunshu, Song Yongcai, Fu Yibei, et al. SYNTHESIS OF SiC CERAMICS BY PYROLYSIS OF ELECTRON BEAM IRRADIATED POLYCARBOSILANE Ⅰ.PYROLYSIS OF POLYCARBOSILANE IRRADIATED IN AIR. [J]. Journal of Radiation Research and Radiation Processing 16(1):1-4(1998) DOI：

摘要

利用加速器产生的电子束（EB）在空气中辐照聚碳硅烷（PCS）,以使之形成交联结构，然后经高温热解转化成SiC陶瓷。结果表明：在辐照产物中形成了Si-C-Si以及Si-O-Si等交联结构，热解温度以及热解陶瓷产率都随辐射吸收剂量增加而明显提高。通过TG-IR联用分析技术，在热解产物中检测到了低分子量PCS以及CH,4,等小分子化合物，在吸收剂量高于2.3MGy时，PCS主要通过析出CH,4,而热解成SiC。

Abstract

Polycarbosilane was irradiated in air by electron beam generated by an accelerator, and then heated to high temperature to produce the SiC ceramics. The results showed that crosslinking bonds including Si-C-Si and Si-O-Si was formed in the irradiated products,and the pyrolysis temperature was consequently elevated from 300℃ of non-irradiated PCS to more than 500℃ of samples irradiated to 2.3 MGy or above. Low molecular weight polycarbosilane and CH,4, were detected in the pyrolysis products. The PCS converted to SiC mainly by CH,4, release when absorbed dose was above 2.3 MGy.

关键词

聚碳硅烷辐射处理电子束热解碳化硅陶瓷

Keywords

PolycarbosilaneRadiation treatmentElectron beamPyrolysisSilicon carbide ceramics

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