α-Al2O3陶瓷与金属镍的真空扩散焊

Vacuum diffusion bonding of α-alumina and nickel

为研究α-Al2O3陶瓷和金属镍之间的扩散焊接,以α-Al2O3陶瓷和高纯金属镍为母材,通过真空扩散焊的方法,考察焊接温度、压力及保温时间对焊接效果的影响。采用电子万能试验机测试工件的焊接强度,用扫描电镜(SEM)观察陶瓷与金属界面的显微结构,用能谱仪(EDS)研究焊接面的扩散情况。结果表明:用Mo-Mn法将陶瓷表面金属化,在θ=1 164℃、p=7.5 MPa、t=30 min的实验焊接条件下,具有较强的扩散能力,金属镍向α-Al2O3陶瓷一侧扩散渗透,实现了α-Al2O3陶瓷与金属镍的连接。

To investigate the welding of α-alumina ceramic and nickel by the vacuum diffusion,the effects of the temperature,the pressure and the holding time on the welding quality were studied.The welding strength was tested by the electronic universal testing machine.The microstructure of the welding surface was observed by the scanning electron microscope（SEM）.The diffusion extent of the ceramic/metal interface was analyzed by energy-dispersive spectrometry（EDS）.The results indicated that the nickel and the ceramic metallized with the molybdenum-manganese（Mo-Mn） exhibited a high quality of welding at θ=1 164 ℃,p=7.5 MPa and t=30 min.