摘要
可电火花加工的导电碳化硅(SiC)陶瓷不仅可以克服传统高电阻率SiC陶瓷难加工的突出缺点,而且能够保留传统高电阻率SiC陶瓷的其他优异性能,在结构陶瓷领域取代传统的高电阻率SiC陶瓷具有突出优势。本文阐述了粉末烧结制备氮掺杂导电SiC陶瓷的原理,归纳总结分析了其粉末烧结制备方法、烧结助剂的种类及其所获得SiC陶瓷的热电和力学性能。同时,探讨了SiC陶瓷的电性能影响因素,为调控SiC陶瓷的电性能提供了参考依据。最后,指出了氮掺杂导电SiC陶瓷面临的主要挑战,在未来研究中,应聚焦于发展新烧结技术与烧结添加剂体系以及澄清电性能调控机制,为制备电阻率可控的高性能导电SiC陶瓷奠定技术基础。
The electrically conductive silicon carbide(SiC)ceramics that can be machined by electrical discharge machining,can not only overcome the highlight shortcomings of traditional high resistivity-grade SiC ceramics in machinability,but also maintain its other excellent properties.It has outstanding advantages to replace traditional high resistivity-grade SiC ceramics in the field of structural ceramics.In this paper,the nitrogen doping principle of electrically conductive SiC ceramics was illustrated,and then the powder sintering methods,sintering additives,thermoelectric and mechanical properties were summarized.Meanwhile,in order to provide guidance for the control of electrical properties,the electrical properties-related factors were discussed.In the end,the main challenges of nitrogen-doped electrically conductive SiC ceramics were pointed out,and the future interests were suggested to focus on the development of new sintering technology and additive,as well as clarifying the control mechanism of electrical properties,thereby establishing the technical foundation for fabrication of high-performance conductive SiC ceramics with controllable electrical resistivity.
作者
杨建国
沈伟健
李华鑫
贺艳明
闾川阳
郑文健
马英鹤
魏连峰
YANG Jianguo;SHEN Weijian;LI Huaxin;HE Yanming;LYU Chuanyang;ZHENG Wenjian;MA Yinghe;WEI Lianfeng(Institute of Process Equipment and Control Engineering,Zhejiang University of Technology,Hangzhou 310023,China;Engineering Research Center of Process Equipment and Remanufacturing(Ministry of Education),Hangzhou 310023,China;College of Mechanical Engineering,Zhejiang University of Technology,Hangzhou 310023,China;Nuclear Power Instituteof China,Chengdu 610213,China)
出处
《材料工程》
EI
CAS
CSCD
北大核心
2022年第9期18-31,共14页
Journal of Materials Engineering
基金
国家自然科学基金(52005445,51975530)
浙江省自然科学基金(LQ21E050018)
国家磁约束核聚变能发展研究专项(2019YFE03100400)。
关键词
碳化硅
导电陶瓷
氮掺杂
电性能
力学性能
silicon carbide
electrically conductive ceramics
nitrogen doping
electrical property
mechanical property
