Synthesis and pyrolysis of single-source precursor for HfCxN1-x-SiC ceramic with different SiC contents

被引：8

作者：

Zeng, Guang ^{[1
]}

Xu, Ping ^{[1
]}

Zeng, Chen ^{[1
]}

Fang, Cunqian ^{[1
,2
]}

Wang, Yafeng ^{[1
]}

Yang, Xin ^{[1
]}

Zhang, Mingyu ^{[1
]}

Su, Zhean ^{[1
]}

Huang, Qizhong ^{[1
]}

机构：

[1] Cent South Univ, Natl Key Lab Sci & Technol High strength Struct Ma, Changsha 410083, Peoples R China

[2] Cent South Univ, Sch Met & Environm, Changsha 410083, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2022年 / 48卷 / 16期

基金：

中国国家自然科学基金;

关键词：

Single-source precursor; Pyrolysis; Ultra-high-temperature ceramics; HfC-SiC; TEMPERATURE; ZRC; OXIDATION; CARBIDE; POWDERS;

D O I：

10.1016/j.ceramint.2022.04.263

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：

A novel single-source precursor was synthesized to prepare HfCxN1-x/SiC multiphase ceramics by using hafnium chloride (HfCl4), diallylamine (DAA) and polycarbosilane (PCS). We conducted an investigation of the synthesis process, polymer-to-ceramic conversion, as well as the microstructure and phase evolution of HfCxN1-x/SiC multiphase ceramics with different levels of SiC content. The results showed that the core-shell particles of HfCxN1-x-carbon were embedded homogeneously in the beta-SiC matrix which is beneficial for preventing grain growth and improving oxidation resistance. Based on data from oxidation tests, the ceramics improved the oxidation temperature and remained stable at a high temperature (1500 degrees C) with oxidation layer formation on the surface. Due to the highly cross-linked structure without oxygen, high ceramic yield, homogeneous composition and excellent oxidation resistance of the pyrolysis product, the as-prepared precursor is a promising material for making high-performance composite ceramics.

引用

页码：22967 / 22974

页数：8

共 28 条

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