采用Au基钎料真空钎焊Al2O3陶瓷
Vacuum brazing of Al2O3 ceramic using Au-based brazing filler
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摘要: 首先选用AgCuTi活性钎料在880℃/10 min参数下对A12O3陶瓷表面进行金属化处理，之后尽量去除金属化层中的AgCu共晶组织，然后选用两种Au基高温钎料在980℃/10 min参数下对金属化后的A12O3进行了钎焊连接.结果表明，在Al2O3/Au-Ni/Al2O3接头中靠近Al2O3母材的界面处生成一层薄薄的扩散反应层，该反应层主要由TiO2和Al2O3组成；在Al2O3/Au-Cu/Al2O3接头中同样存在扩散反应层，与前者不同的是，接头中检测到Ti-Au相的存在.分别对Au-Ni和Au-Cu两种钎料获得的Al2O3接头进行了抗剪强度测试，前者对应接头强度为95.5 MPa，后者对应接头强度达到102.3 MPa.Abstract: First, surface metallization of Al2O3 ceramic was carried out at 880℃ heat treatment for 10 min using AgCuTi as active brazing filler, and then, vacuum brazing of the ceramic was performed at 980℃ for 10 min using two Au-based brazing fillers. The results showed that a thin diffusion layer containing TiO2 and Al2O3 was formed at the Al2O3/Au-Ni/Al2O3 joint interface close to Al2O3 side. In Al2O3/Au-Cu/Al2O3 joint, besides Ti-O compound, Ti-Au compound existed in the diffusion layer. The test results at room temperature showed that the shear strength of two ceramic joints were 95.5 MPa and 102.3 MPa, respectively.
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Keywords:
- Al2O3 ceramic /
- brazing /
- AgCuTi /
- metallization /
- Au-based brazing filler
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