CAJ | 학술논문

本文利用AgCuTi-W复合钎料作中间层,在适当的工艺参数下真空钎焊C_f/SiC复合材料与Ti合金,利用SEM,EDS,XRD分析接头微观组织结构,利用剪切试验检测接头力学性能.研究结果表明:钎焊时,复合钎料中的Ti借助Cu-Ti液相与C_f/SiC复合材料反应,在C_f/SiC复合材料与连接层界面形成Ti3SiC2,Ti3Si和少量TiC化合物的混合反应层.复合钎料中的Cu与Ti合金中的Ti发生互扩散,在连接层与Ti合金界面形成不同成分的Cu-Ti化合物过渡层.钎焊后,形成W颗粒强化的致密复合连接层,W颗粒主要分布在Cu-Ti相中.W的加入缓解了接头的残余热应力,C_f/SiC/AgCuTi-W/TC4接头剪切强度明显高于C_f/SiC/AgCuTi/TC4接头.
본문이용AgCuTi-W복합천료작중간층,재괄당적공예삼수하진공천한C_f/SiC복합재료여Ti합금,이용SEM,EDS,XRD분석접두미관조직결구,이용전절시험검측접두역학성능.연구결과표명:천한시,복합천료중적Ti차조Cu-Ti액상여C_f/SiC복합재료반응,재C_f/SiC복합재료여련접층계면형성Ti3SiC2,Ti3Si화소량TiC화합물적혼합반응층.복합천료중적Cu여Ti합금중적Ti발생호확산,재련접층여Ti합금계면형성불동성분적Cu-Ti화합물과도층.천한후,형성W과립강화적치밀복합련접층,W과립주요분포재Cu-Ti상중.W적가입완해료접두적잔여열응력,C_f/SiC/AgCuTi-W/TC4접두전절강도명현고우C_f/SiC/AgCuTi/TC4접두.
C_f/SiC was successfully joined to Ti alloy with AgCuTi-W mixed powder by some suitable brazing parameters. Microstructures of the brazed joint were investigated by SEM, EDS and XRD. The mechanical properties of the brazed joints were measured by mechanical testing machine. The results showed that Ti element in the interlayer can reaction with the brazed composite, a mixture of Ti3SiC2,Ti3Si and TiC composites finally formed the reaction layer between composite and interlayer. Ti alloy constantly dissolves and Cu diffuses into the Ti alloy, forming the diffusion -reaction layers between interlayer and Ti alloy. The performed joints have dense bonding layers reinforced by W. These composite brazing layers relaxed the thermal stress of the joint effectively. These characteristics were beneficial to the joint, of which the shear strength were remarkably highly than the optimal shear strengths of the joint brazed with pure AgCuTi.