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在大气环境下,采用扩散焊接方法进行了ZrB2陶瓷与Al-Sn-Mg合金的连接。Al-Sn-Mg合金为Al-x%Sn-y%Mg(x=0,0.5,1.0,2.0;y=0,0.5,1.0,2.0),ZrB2陶瓷为纯ZrB2型。焊接工艺是在1、2和4 MPa的压力,873K的温度下保持3.6、7.2和14.4ks。采用扫描电镜、电子探针及剪切试验等测试方法研究了其接头的组织及力学性能。结果表明,ZrB2陶瓷能够与Al-Sn-Mg合金实现扩散连接。“Al-Sn”合金可作为ZrB2陶瓷扩散焊中间层材料使用,最合适的合金为Al-0.5Sn-0.5Mg。ZrB2/Al-0.5Sn-0.5Mg在873K温度下进行扩散焊,焊接压力在2～4MPa,保温时间在7.2～14.4ks时获得的接头强度都在42～44MPa之间,但该接合强度只能保持到373K,不适合在高温环境下使用。
Under atmospheric environment, the connection between ZrB2 ceramic and Al-Sn-Mg alloy was carried out by diffusion welding method. The Al-Sn-Mg alloy is Al-x% Sn-y% Mg (x = 0, 0.5, 1.0, 2.0; y = 0, 0.5, 1.0, 2.0) and the ZrB2 ceramic is pure ZrB2. The welding process is maintained at pressures of 1, 2 and 4 MPa, 3.6, 7.2 and 14.4ks at 873K. The microstructure and mechanical properties of the joints were studied by using scanning electron microscopy, electron probe and shear test. The results show that ZrB2 ceramics can be diffusion bonded with Al-Sn-Mg alloy. “Al-Sn ” alloy can be used as ZrB2 ceramic diffusion welding intermediate layer material, the most suitable alloy is Al-0.5Sn-0.5Mg. ZrB2 / Al-0.5Sn-0.5Mg diffusion welding at a temperature of 873K, the welding pressure at 2 ~ 4MPa, holding time 7.2 ~ 14.4ks obtained joint strength are between 42 ~ 44MPa, but the bonding strength only Hold to 373K, not suitable for use in high temperature environment.