AZ91镁合金中La的吸收率及其影响因素  

Absorptivity of La in AZ91 magnesium alloy and its influencing factors

作　　者：王社斌[1] 张金玲[1] 张俊远[1] 李明照[1] 郭端阳[1] 许并社[1] 

机构地区：[1]太原理工大学材料科学与工程学院

出　　处：《中国有色金属学报》2007年第6期968-972,共5页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金重大研究计划资助项目(90306014);国家自然科学基金资助项目(20271037;20471041);国家自然科学基金国际合作资助项目(50311140138)

摘　　要：在AZ91镁合金熔体中添加不同含量的La元素进行精炼实验,定量地测定在973～993 K下、Al含量为8.0%～9.5%时La元素吸收率的变化。结果表明:当La元素添加量大于0.2%、Al含量大于9%时,La的吸收率稳定在(75±5)%;当La含量小于0.2%、Al含量小于9%时,La的吸收率随La添加量的增加而增大。大量的La元素以Al11La3化合物形式存在于镁合金基体中形成弥散组织。AZ91 magnesium alloy with various additions of La were smelted in vacuum electric furnace. The effects of La addition on the influencing factors of La absorption in AZ91 magnesium alloy were investigated. The variation of La absorption was quantitatively measured under the condition of refining temperature 973-993 K and Al content 8.0%-9.5%. The results show that when the La addition is greater than 0.2% and Al content more than 9%, the absorptivity of La is （75±5）%; when the La addition is less than 0.2% and the Al content is less than 9%, the absorptivity of La increases with increasing La addition. Most of La shows in the form of Al11La3 and distributes dispersively.

关 键 词：AZ91镁合金 LA 吸收率 

分 类 号：TG146.6[一般工业技术—材料科学与工程]