用透射电镜（ＴＥＭ）研究了Ｃｕ－Ａｌ爆炸焊的结合层，爆炸焊连接是由熔化和扩散共同作用的结果．在熔区内存在非晶态与晶态，晶态主要由ＣｕＡｌ_２．Ｃｕ_３Ａｌ_２和Ｃｕ_４Ａｌ组成．与熔区相邻的Ａｌ侧发生了再结晶，Ｃｕ向Ａｌ中的扩散距离＜１００ｎｍ，析出针状的ＣｕＡｌ_２相与熔区相邻的Ｃｕ侧只发生了回复，Ａｌ向Ｃｕ中的扩散距离＜１００ｎｍ，形成了新相层，可能是Ｃｕ_３Ａｌ_２和Ｃｕ_４Ａｌ．在非熔化区存在Ｃｕ和Ａｌ的互扩散，形成新相层的厚度＜１００ｎｍ．
The amorphous and crystalline phases were observed in molten region of the Cu-Al explosively welded joint. The crystalline phases consist of CuAl2, Cu3Al2 and Cu4Al.Recrystallization takes place in Al region adjacent to the molten zone, and the diffusion distance of Cu in Al is less than 100 nm with needle-like CuAl2 phase precipitated. Recovery takes place in Cu region adjacent to the molten zone because of the dispersive Cu2O phase precipitating,and the diffusion distance of Al in Cu is also less than 100 nm with new phase layers which might be Cu3Al2 and Cu4Al formed. Interdiffusion between Cu and Al can be observed in non-molten region with diffusion distance less than 100 nm to form new phase layers.
参考文献
| [1] | 周邦新,盛钟琦,彭峰．金属学报,1989:25(1):A7 |
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