摘要
以SiC粉和ZrH2粉为原料,利用真空烧结工艺制备了耐事故SiC/Zr复合材料。通过对SiC-Zr烧结体系进行热力学分析,对SiC和ZrH2混合粉末的加热过程进行TGA和DSC分析,制定了较合理的烧结工艺,并对SiC与Zr之间的界面反应进行了研究,对SiC/Zr复合材料的耐腐蚀性能进行了评价。结果表明:粉末冶金法可以制备出致密度为96%的SiC/Zr复合材料,烧结温度为1100℃,烧结时间为90min。SiC与Zr在界面处发生了界面反应,产物为ZrC和Zr2Si,且界面呈多层结构,从SiC到Zr基体,界面层的相分布次序为ZrC/ZrC+Zr2Si/ZrC。与锆合金相比,SiC/Zr复合材料表现出更好的耐腐蚀性能。
Accident resistant SiC/Zr composite material was prepared by powder metallurgy process using SiC powder and ZrH2 powder as the raw material.The optimum process parameters for sintering SiC/Zr composite material were determined by combination of thermodynamics analysis of SiC-Zr system and TGA-DSC results of ZrH2 and SiC mixed powders.In addition,the interface reaction in SiC-Zr system and corrosion behavior of SiC/Zr were also studied in detail.The results show that SiC/Zr composite material with high density(96%)can be successfully prepared by sintering at 1 100℃for 90 min.SiC reacts with Zr at the interface and its products are Zr2Si and ZrC,thus leading to a layer structure of ZrC/ZrC+Zr2Si/ZrC from SiC side to Zr side in the reaction zone.Compared with the property of Zr prepared under the same conditions,corrosion resistance of SiC/Zr composite material is greatly enhanced.
作者
岳慧芳
冯可芹
庞华
张瑞谦
李垣明
吕亮亮
赵艳丽
袁攀
YUE Huifang;FENG Keqin;PANG Hua;ZHANG Ruiqian;LI Yuanming;LYU Liangliang;ZHAO Yanli;YUAN Pan(School of Manufacturing Science and Engineering,Sichuan University,Chengdu 610065;Science and Technology on Reactor System Design Technology Laboratory,Nuclear PowerInstitute of China,Chengdu 610213;Science and Technology on Reactor Fuel and Material Laboratory,Nuclear Power Institute ofChina,Chengdu 610041)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2019年第A01期321-325,共5页
Materials Reports
基金
中国核动力研究设计院反应堆燃料及材料重点实验室合作项目(STRFML-2014-05)~~
