真空气氛中CuMnCr合金在石墨表面的润湿行为  

Wetting behavior of graphite by CuMnCr alloy in vacuum atmosphere

作　　者：孟卫如[1,2] 徐可为[1] 杨吉军[1] 贺林[1] 

机构地区：[1]西安交通大学金属材料强度国家重点实验室 [2]西安理工大学材料科学与工程学院,西安710048

出　　处：《中国有色金属学报》2005年第3期374-379,共6页The Chinese Journal of Nonferrous Metals

摘　　要：通过差热分析确定了含Cr量分别为0, 0.25%, 0.5%, 1.0%, 2.0%, 4.0%(摩尔分数)的CuMnCr合金的熔化温度。采用座滴法测量了不同温度下不同Cr含量的 CuMnCr合金在石墨表面的铺展面积和接触角。在真空气氛中Mn的蒸发引起CuMnCr合金在石墨表面的润湿性随温度变化而变化, 不同 Cr含量的 CuMnCr合金在石墨表面的接触角在960℃时最小。不同Cr含量的合金在不同温度下表现出最佳的铺展面积, 随含 Cr量的增加界面反应层的厚度增加。通过X射线衍射分析不含Cr和含Cr的合金界面反应产物分别为Mn7C3 和CrxCy。By thermal analysis (DSC) the melting temperatures of CuMnCr alloys were decided and the sessile drop method was used to study the wetting behavior of CuMnCr series alloys on graphite surface. The results show that the wetting behavior of CuMnCr alloy is different from that of the other alloys due to the volatilization of Mn in the vacuum atmosphere, and with a certain Cr content the alloy has the optimal wetting behavior, i.e. the minimum contact angle at 960℃. The interface thickness is increased along with the amount increasing of Cr in the CuMnCr alloy. The XRD analysis indicate that the interface reaction productions between graphite and CuMnCr alloy are Mn_7C_3 and Cr_xC_y, respectively.

关 键 词：座滴法 CuMnCr合金 润湿性 石墨 

分 类 号：TG454[金属学及工艺—焊接]