电子束辐照含铍聚碳硅烷制备含铍碳化硅纤维
TQ343; 以含铍聚碳硅烷(PBeCS)为原料,在N2:O2的流量比为200:1的气氛下用电子加速器对PBeCS先驱丝进行辐照交联,然后在N2下高温烧结制备含铍碳化硅(SiC)纤维.研究了辐照剂量对先驱丝的化学结构、凝胶含量、含氧量及烧成SiC纤维抗拉强度的影响.结果表明:在有氧的气氛下辐照交联主要是Si—H与O2反应生成Si—OH,然后Si—OH发生脱水缩合反应生成Si—O—Si,Si—H与Si—CH3生成Si—CH2—Si;1250℃烧成制得的含铍碳化硅纤维具有光滑的表面,形成了β-SiC晶型,纤维的氧的原子分数低于5％,C/Si比接近1:1,纤维的平均强度为1.8GPa,平均弹性模量为...
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| Published in | 材料工程 Vol. 46; no. 12; pp. 54 - 60 |
|---|---|
| Main Authors | , , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
新型特种纤维及其复合材料湖南省重点实验室,长沙410083
20.12.2018
中南大学航空航天学院 ,长沙410083 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-4381 |
| DOI | 10.11868/j.issn.1001-4381.2017.000982 |
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| Abstract | TQ343; 以含铍聚碳硅烷(PBeCS)为原料,在N2:O2的流量比为200:1的气氛下用电子加速器对PBeCS先驱丝进行辐照交联,然后在N2下高温烧结制备含铍碳化硅(SiC)纤维.研究了辐照剂量对先驱丝的化学结构、凝胶含量、含氧量及烧成SiC纤维抗拉强度的影响.结果表明:在有氧的气氛下辐照交联主要是Si—H与O2反应生成Si—OH,然后Si—OH发生脱水缩合反应生成Si—O—Si,Si—H与Si—CH3生成Si—CH2—Si;1250℃烧成制得的含铍碳化硅纤维具有光滑的表面,形成了β-SiC晶型,纤维的氧的原子分数低于5％,C/Si比接近1:1,纤维的平均强度为1.8GPa,平均弹性模量为179GPa. |
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| AbstractList | TQ343; 以含铍聚碳硅烷(PBeCS)为原料,在N2:O2的流量比为200:1的气氛下用电子加速器对PBeCS先驱丝进行辐照交联,然后在N2下高温烧结制备含铍碳化硅(SiC)纤维.研究了辐照剂量对先驱丝的化学结构、凝胶含量、含氧量及烧成SiC纤维抗拉强度的影响.结果表明:在有氧的气氛下辐照交联主要是Si—H与O2反应生成Si—OH,然后Si—OH发生脱水缩合反应生成Si—O—Si,Si—H与Si—CH3生成Si—CH2—Si;1250℃烧成制得的含铍碳化硅纤维具有光滑的表面,形成了β-SiC晶型,纤维的氧的原子分数低于5％,C/Si比接近1:1,纤维的平均强度为1.8GPa,平均弹性模量为179GPa. |
| Author | 王春齐 岳建岭 胡思闽 黄小忠 王畅 朱文华 |
| AuthorAffiliation | 中南大学航空航天学院 ,长沙410083;新型特种纤维及其复合材料湖南省重点实验室,长沙410083 |
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| Author_FL | WANG Chun-qi HU Si-min YUE Jian-ling ZHU Wen-hua HUANG Xiao-zhong WANG Chang |
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| Keywords | 含铍碳化硅纤维 交联 电子束辐照 含铍聚碳硅烷 |
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| Publisher | 新型特种纤维及其复合材料湖南省重点实验室,长沙410083 中南大学航空航天学院 ,长沙410083 |
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| Title | 电子束辐照含铍聚碳硅烷制备含铍碳化硅纤维 |
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