采用真空热压扩散连接法制备出冶金结合的钢铜铝复合材料,采用电解腐蚀法对所制备的复合材料从铜侧进行分层腐蚀,并结合扫描电镜(SEM)、能谱分析(EDS)和X射线衍射(XRD)对所腐蚀德连接界面的各个扩散层进行了形貌、成分、相分析。结果表明:铜/锚界面,从铜侧到铝侧以次为铝在铜中的固溶体,Cu9Al4和CuAl2;不锈钢/铜界面为铜在不锈钢中的固溶体。研究得到了适用于本实验条件下的铝铜金属间化合物生长方式。
The vacuum warm compaction diffusion method is used to prepare the Al/Cu/0Cr18Ni9Ti composite; electrochemical corrosion is used to gradation etch the Cu and the interface of Al/Cu; and further the scanning electron microscopy (SEM), electron probe microanalysis (EPMA) and X-ray diffractometer (XRD) are used respectively to analyze the gradation etched interface. The following results are obtained: under the condition of two steps diffusion bonding, the composite is well bonded with the joint less than 9μm of intermetallic compound in the Al/Cu joint, 1.5μm solid solution formed in the Cu/0Cr18Ni9Ti diffusion zone; through the four stages growth, two kinds of intermetallic compound formed in the interface of Al/Cu, CugAl4 adjacent to the Cu side and CuAl2 adjacent to the Al side. The growing model of Al/Cu intermetallic compounds is found suitable for the condition of the experiment by this study.