Shuhua LIANG
,
Xianhui WANG
,
Liang FANG
,
Zhikang FAN
金属学报(英文版)
doi:10.1016/S1006-7191(08)60073-3
Since Cu-Al powder characteristics have important effects on the preparation of Cu/Al2O3 composite, the apparent activation energy of Al internal oxidation reaction in Cu-Al pre-alloyed powders with different characteristics was calculated in the present investigation. The microstructure and properties of the synthesized Cu/Al2O3 were studied. The results show that high-energy milling can obviously promote internal oxidation of Al in Cu-Al powders in the same solid solubility. At the same milling conditions and internal oxidation parameters, the solid solution of Al in Cu either in low or high amount will result in the poor microstructure and properties of the Cu/Al2O3 composite. Subsequently, when high-energy milling and internal oxidation are synchronously used to prepare the Cu/Al2O3 composite, there should be an appropriate solubility and milling effect for the pre-alloyed powders.
关键词:
characteristic
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null
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刘建飞
,
肖来荣
,
余宸旭
,
石强
,
王泓宇
宇航材料工艺
doi:10.3969/j.issn.1007-2330.2015.05.011
利用已经制备的Nb-38Ti-12Al合金铸锭,将其加工为厚度为0.50 mm的板材,并通过X射线衍射分析(XRD)、金相显微镜(OM)、扫描电镜(SEM)、箱式电阻炉、分析天平等方法研究了合金在1 200℃下发生氧化反应后氧化膜出现的分层现象,通过计算单位面积内合金氧化增重质量,绘制出合金氧化增重曲线,并利用合金内氧化层厚度计算出在1 000℃和1 200℃的内氧化动力学方程,分别为x1.228 =34.50t和x1.480=288.73t.
关键词:
Nb-38Ti-12Al合金
,
内氧化
,
动力学方程
,
氧化增重
