焊管2025，Vol.48Issue(5)：45-51,7.DOI:10.19291/j.cnki.1001-3938.2025.05.006
NiCoCr中熵合金与SiC陶瓷的润湿性及钎焊接头组织性能研究
Study on Microstructure and Properties of Wetting and Brazing Joints of Entropy Alloy and SiC Ceramics in NiCoCr
摘要
Abstract
In order to obtain SiC ceramic joint with high temperature resistance,NiCoCr medium entropy alloy with high melting point was used as the joining material to connect SiC.The wetting behavior of SiC ceramics with entropy alloy in NiCoCr and the joining of SiC ceramics with NiCoCr and Ti/NiCoCr/Ti composite intermediate were studied.Results show that NiCoCr alloy will react violently with SiC in the molten state,promote the decomposition of SiC,resulting in a large amount of graphite phase and metal silicide in the brazing joint,and the interface wetting mechanism is solution-driven wetting.In order to reduce the interfacial reaction,Ti layer is introduced between NiCoCr and SiC.Results show that the high reactivity of NiCoCr can be inhibited to some extent,and a brazed joint without graphite residue phase is obtained at 1 380℃for 10 min.The bending strength of the joint at room temperature is up to 86 MPa,which is 143%higher than that of the joint without Ti layer.关键词
SiC陶瓷/钎焊/高熵合金/界面反应/NiCoCrKey words
SiC ceramics/brazing/high entropy alloy/interfacial reaction/NiCoCr分类
金属材料引用本文复制引用
朱睿,陶拥,邓卜峰,宋奎晶,钟志宏..NiCoCr中熵合金与SiC陶瓷的润湿性及钎焊接头组织性能研究[J].焊管,2025,48(5):45-51,7.基金项目
安徽省自然科学基金项目"金刚石与金属钎焊界面组织与接头残余应力控制研究"(项目编号2208085ME134) （项目编号2208085ME134）
合肥工业大学大学生创新创业训练计划项目"基于高熵合金钎料的C/SiC复合材料与GH4169高温合金钎焊研究"(项目编号202310359013). （项目编号202310359013）
