摘要
SiC_(f)增强镍基复合材料作为一种高强度轻量化的新型高温材料,受到材料前沿研究的关注。然而剧烈的界面反应阻碍了该材料的进一步发展。由于长时制备下界面反应剧烈,因此采用具有短时快速制备成型特点的放电等离子烧结工艺制备并研究了Ni/SiC_(f)复合体系。利用SEM,EDS等表征方法对Ni/SiC_(f)复合体系的界面形貌及元素分布进行了分析。结果表明,Ni与SiC_(f)发生反应生成Ni_(3)Si和碳颗粒。反应区域进一步与Ni反应转变成Ni(Si,C)固溶体。Ni与SiC_(f)及Ni与Ni_(3)Si之间的强烈反应热力学及动力学条件导致界面反应迅速发生。通过提升制备温度、延长制备时间会引起Ni_(3)Si与碳颗粒进一步溶解,从而导致反应区域缩小,固溶体区域扩大。
As a new high-temperature material with higher strength and lighter weight,researchers have paid attention to the SiC_(f)reinforced nickel matrix composite.However,the severe interface reaction hinders the further development of this material.Due to the severe reaction of long-time preparation,in present work the Ni/SiC_(f)composite system was prepared by spark plasma sintering which is characterized by shorter preparation time.SEM and EDS were used to analyze the interface morphology and element distribution.The results show that Ni reacts with SiC_(f),and Ni_(3)Si and carbon particles are formed.The reaction zone further reacts with Ni to generate Ni(Si,C) solid solution.There exist strong thermodynamic and kinetic conditions between Ni/SiC_(f)system and Ni/Ni_(3)Si system,which induce violent interface reaction.Raising sintering temperature and prolongin g holding time could prompt Ni_(3)Si and carbon particles to further dissolve.The dissolution process will shrink the reaction zone and expand the solid solution zone.
作者
王法
江河
董建新
WangFa;Jiang He;Dong Jianxin(School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing100083,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2022年第2期599-606,共8页
Rare Metal Materials and Engineering
基金
高温结构材料重点实验开放基金
中央高校基本科研业务费(FRF-TP-19-038A2)。
