Ni-Ti-Mo钎料连接SiC陶瓷的微观组织与性能研究  

Microstructure and Properties of SiC Ceramics Connected by Ni-Ti-Mo Filler

作　　者：江柏均 吴江[3] 辛成来 颜家振[3] 石浩江 李宁[3] JIANG Bojun;WU Jiang;XIN Chenglai;YAN Jiazhen;SHI Haojiang;LI Ning(School of Mechanical Engineering,ChengDu University,Chengdu 610106,China;School of Architecture and Civil Engineering,ChengDu University,Chengdu 610106,China;School of Mechanical Engineering,Sichuan University,Chengdu 610065,China;Science and Technology on Reactor Fuel and Materials Laboratory,Nuclear Power Institute of China,Chengdu 610213,China)

机构地区：[1]成都大学机械工程学院,成都610106 [2]成都大学建筑与土木工程学院,成都610106 [3]四川大学机械工程学院,成都610065 [4]中国核动力研究设计院反应堆燃料及材料重点实验室,成都610213

出　　处：《真空科学与技术学报》2024年第11期950-954,共5页Chinese Journal of Vacuum Science and Technology

基　　金：重点实验室基金项目(STRFML-2023-14)。

摘　　要：为了缓解SiC陶瓷钎焊接头中的残余应力,提高接头的室温力学性能,采用Ni-Ti-Mo钎料来连接SiC陶瓷。结果表明:SiC/Ni-Ti-Mo/SiC接头结合良好,焊缝致密无孔洞。接头由界面反应区和焊缝中心区两个区域组成,界面反应区的微观组织为(Ti,Mo)C相,焊缝中心区的微观组织为Ni2Si和Ni3Si2以及大量的(Ti,Mo)C颗粒。接头中大量生成的(Ti,Mo)C相与SiC陶瓷母材的热膨胀系数相近,能降低接头的残余应力,提高了接头的力学性能。接头的平均室温剪切强度达为176±17 MPa,且断裂方式为母材断裂。To alleviate the residual stress in SiC ceramic brazing joints and enhance their mechanical properties at room temperature,a Ni-Ti-Mo brazing filler was employed to join SiC ceramics.The results demonstrate that the SiC/Ni-Ti-Mo/SiC joint exhibits excellent bonding,with a dense and pore-free weld.The joint consists of two distinct regions:the interface reaction area and the weld center area.The microstructure of the interface reaction area is characterized by the(Ti,Mo)C phase,while the weld center area comprises Ni2Si and Ni3Si2 phases,along with a significant amount of(Ti,Mo)C particles.The(Ti,Mo)C phase,which is extensively formed in the joint,has a thermal expansion coefficient similar to that of the SiC ceramic base material.This reduces the residual stress of the joint and improves its mechanical properties.The average shear strength of the joints is 176 MPa at room temperature,with fractures occurring within the base metal.

关 键 词：钎焊 Ni-Ti-Mo钎料 SIC陶瓷 力学性能 热膨胀系数 

分 类 号：TG454[金属学及工艺—焊接]