Synthesis of a novel single-source precursor for HfC ceramics and its feasibility for the preparation of Hf-based ceramic fibres

被引：21

作者：

Cheng, Jun ^{[1
]}

Wang, Xiaozhou ^{[1
]}

Wang, Jun ^{[1
]}

Wang, Hao ^{[1
]}

机构：

[1] Natl Univ Def Technol, Sci & Technol Adv Ceram Fibres & Composites Lab, Changsha 410073, Hunan, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2018年 / 44卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Ultra-high-temperature ceramics; Precursor; HfC; Fibres; HAFNIUM CARBIDE POWDERS; TEMPERATURE CERAMICS; ZIRCONIUM CARBIDE; THIN-FILMS; FABRICATION; COMPOSITES; OXIDATION; PLASMA;

D O I：

10.1016/j.ceramint.2018.01.066

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：

The growing popularity of ultra-high-temperature ceramics inspired us to prepare Hf-based ceramic fibres by sequential melt hand-drawing, ultraviolet (UV) crosslinking, and pyrolysis of a novel polymeric precursor synthesised by co-polymerisation of HfCl4, ethylenediamine, and allylamine. The above precursor featured a backbone comprising Hf-N and CH = CH groups and exhibited good melt spin ability due to having a relatively linear-chain structure, an optimal molecular weight (M-n= 2569 g/mol), and a suitable softening point (135-155 degrees C), being easily melt-drawn into green fibres (diameter = 25 pm) and exhibiting a high ceramic yield of 46.38 wt% at 1500 degrees C. UV curing of green fibres at room temperature and their subsequent pyrolysis in an inert atmosphere at 1200 and 1600 degrees C afforded Hf-based ceramic fibres (diameter = 13 pm), indicating the great potential of the above precursor and the prepared ceramic fibres for ceramic matrix composites used in high temperature applications.

引用

页码：7305 / 7309

页数：5

共 23 条

[1] Nitrogenation of hafnium carbide powders in AC and DC plasma by Electrical Discharge Assisted Mechanical Milling [J].