铜铝合金内氧化组织特征的研究

采用包埋法、气体法对不同铝含量的铜铝合金内氧化的组织形貌进行了研究。结果表明，内氧化层的组织形貌主要取决于铝含量。但工艺条件（介质、温度、时间）也有一定的影响。内氧化物的粗化和形态的转变是基体固溶态铝向内氧化层发生了较强逆扩散引起的；内氧化层中铝、氧分布的不均匀性是氧梯度变化与铝逆扩散相互作用的结果。

Study on Character of Internal Oxidation Morphology in Cu AlAlloy

The internal oxidation behavior of various concentration of aluminum was investigated in Cu-Al alloys by Rhines pack and gas method. The results suggest that the morphology in the layer depends on the aluminum concentration mainly, but the experimental coditions, such as medium temperature and time, take some effect. The coaresening of the internal oxides and changing of the morphology are caused by dissolved aluminum conterdiffusion toward the layer intensely. The interaction of the gradient of oxygen concentration and aluminum conterdiffusion result from non-homogeneous of the concentration of aluminum and oxygen in the oxidation layer.