Processing, characterization and properties of novel gradient Si3N4/SiC fibers derived from polycarbosilanes

被引：18

作者：

Dong, Xichao ^{[1
]}

Guo, Changqing ^{[1
]}

Liu, Xingyu ^{[1
]}

Gu, Chong ^{[1
]}

Wu, Pengfei ^{[1
]}

Lin, Wen ^{[1
]}

Lu, Yingxi ^{[2
]}

Su, Zhiming ^{[1
]}

Yu, Zhaoju ^{[1
,3
]}

Liu, Anhua ^{[1
,3
]}

机构：

[1] Xiamen Univ, Coll Mat, Minist Educ, Key Lab High Performace Ceram Fibers, Xiamen 361005, Fujian, Peoples R China

[2] Qingdao Univ Sci & Technol, Coll Mat Sci & Engn, Qingdao 266042, Shandong, Peoples R China

[3] Xiamen Univ, Fujian Key Lab Adv Mat, Xiamen 361005, Fujian, Peoples R China

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2019年 / 39卷 / 13期

基金：

中国国家自然科学基金;

关键词：

Polycarbosilane; Nitridation; Gradient fibers; Silicon carbide fiber; Silicon nitride fiber; SILICON-CARBIDE FIBER; PYROLYSIS PROCESS; NITRIDE FIBERS; POLYMER; CONVERSION; CERAMICS; OXIDATION; STRENGTH; MECHANISMS;

D O I：

10.1016/j.jeurceramsoc.2019.05.028

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this work, we report a novel kind of Si3N4/SiC composite fibers, which exhibit a controlled gradient Si3N4(shell)/SiC(core) structure. These composite fibers are fabricated through a controlled nitridation and pyrolysis process on electron irradiation-cured polycarbosilane fibers. Structural and chemical analysis based on Elemental Analyzer, FT-IR, Raman spectroscopy, electron probe micro-analyzer, X-ray photoelectron spectroscopy, and X-ray diffraction confirm the gradient structure of obtained fibers, which consist a shell with high Si3N4 content and a SiC core. The as-fabricated fibers exhibit dense and smooth surfaces, and no microscopic holes or defects were observed. The effects of nitridation temperature on mechanical properties and electrical resistivity were also investigated. Combined with high mechanical properties and lightweight, the present gradient Si3N4/SiC fibers open a new strategy to fabricate multifunctional and electromagnetic wave absorbing materials.

引用

页码：3613 / 3619

页数：7

共 43 条

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