通过保持一定钎焊温度,改变钎焊时间得到不同反应层厚度的Al2O3/AgCuTi界面.结合扫描电镜(SEM)和力学试验结果,分析了反应层厚度对Al2O3/AgCuTi/Ti-6Al-4V接头强度的影响.结果表明:厚度为1.5 μm时,接头强度达到最大值125 MPa;厚度小于1 μm,剪切试样沿反应层和Al2O3陶瓷界面断裂;大于3 μm,沿反应层断裂.反应层厚度较薄时,接头强度取决于界面强度和残余应力的大小;反应层厚度较厚时,接头强度取决于反应层自身强度和残余应力的大小.
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