改善氧化铝短纤维与铝液基体间浸润性的研究  

Improvement on the Wettability and Adherence of Al_2O_3(sf)/Al Composites by Matrix Alloying

作　　者：涂弢[1] 刘政[2] 

机构地区：[1]南方冶金学院材料与化学学院,江西赣州341000 [2]南方冶金学院教务处,江西赣州341000

出　　处：《轻金属》2004年第11期40-42,共3页Light Metals

摘　　要：提出通过基体合金化改善Al2 O3(sf) /Al界面浸润性的想法 ,添加的合金元素M须满足以下两个条件 :(1 )元素M的表面能必须小于Al的 ,即ΓM<ΓAl;(2 )元素M的氧化物生成Gibbs自由能要小于氧化铝的。在试验中得以验证 ,元素Mg是一种良好的润湿增强剂 ,稀土元素La可在Mg的基础上进一步增强其润湿性 。To improve the wettability and adherence of A1_2O_3(sf)/Al composites, the approach by matrix alloying is supposed. The alloying element M have to meet both of the following requirements: (1)It is able to reduce the surface tension of molten aluminium, namelyσM<σAl;(2)The oxide of M has more negative standard free energy than Al2O3,namelyΔG(MxOy)<ΔG(Al2O3).The supposition has been proved experimentally, It has been revealed that Mg enhanced wettablity.La promoted wetting further in addition to Mg, but the compound of RE is not found at the interface.

关 键 词：基体合金化 Al2O3(sf)/Al复合材料 浸润性 界面 

分 类 号：TB331[一般工业技术—材料科学与工程]