摘要
液态铝对 Al2 O3不润湿使该体系复合材料制备困难 ,性能也难以提高。本研究采用改进的座滴法装置测定了纯铝和 Al- La合金在 Al2 O3表面的润湿性 ,并用电子探针分析了 Al- La合金与 Al2 O3的界面。结果表明 :少量稀土元素La的加入可以使铝润湿 Al2 O3,其润湿角从 90 .5°减小到 80°左右。L a与 Al2 O3在液 /固界面反应生成 La2 O3是改善铝对 Al2 O3润湿性的主要原因。
WT10.BZ]It is difficult for Al_2O_3/aluminum composites with excellent properties to be fabricated due to nonwetting of Al_2O_3 by molten aluminum In this paper, the wettability of Al_2O_3 by molten aluminum and AlLa alloy was measured with an improved sessile drop technique and the interface between AlLa alloy and Al_2O_3 was analyzed with electron prober The experiment results show Al_2O_3 is wetted by molten aluminum when rare earth element La is added in The wetting angle decreases from 905° to about 80° This phenomenon results from La_2O_3 produced in the interf ace by reaction of La and Al_2O_3
出处
《材料工程》
EI
CAS
CSCD
北大核心
2000年第4期11-13,共3页
Journal of Materials Engineering
