Phase relations and hydrogenation behavior of (La_(1-x)Mg_x)_3Al alloys  

作　　者：LIU Yujie ZHANG Qing＇an 

机构地区：[1]School of Materials Science and Engineering, Anhui University of Technology, Ma＇anshan 243002, China

出　　处：《Rare Metals》2007年第1期8-12,共5页稀有金属（英文版）

基　　金：This study is financially supported by the Natural Science Foundation of Anhui Province (No. 050440602);the Key Project of Chinese Ministry of Education (No. 205070);the Scientific Research Foundation for the Candidates of Academic Leaders, Education Department of Anhui Province, China (No. 2005hbz08).

摘　　要：The crystal structures and hydrogenation behavior of （La1-xMgx）3Al （x = 0.1, 0.2, 0.3, and 0.4） alloys were investigated. It was found that the alloys with x = 0.1 and 0.2 consist of La（Mg,Al）, La, and a novel phase. The novel phase was determined as La2Al. It is shown that the amount of La2Al decreases as the Mg content increases. When x increases to 0.3, only La（Mg,Al） and a small amount of La2Al exist. When x is 0.4, La2Al phase disappears and the alloy contains both La（Mg,Al） and La（Al,Mg）2 Laves phase. The （Lao.9MgoA）3Al and （La0.TMg0.3）3Al alloys can be decomposed into LaH3, MgH2, and La2Al5 by the absorption of hydrogen at 473 K.The crystal structures and hydrogenation behavior of （La1-xMgx）3Al （x = 0.1, 0.2, 0.3, and 0.4） alloys were investigated. It was found that the alloys with x = 0.1 and 0.2 consist of La（Mg,Al）, La, and a novel phase. The novel phase was determined as La2Al. It is shown that the amount of La2Al decreases as the Mg content increases. When x increases to 0.3, only La（Mg,Al） and a small amount of La2Al exist. When x is 0.4, La2Al phase disappears and the alloy contains both La（Mg,Al） and La（Al,Mg）2 Laves phase. The （Lao.9MgoA）3Al and （La0.TMg0.3）3Al alloys can be decomposed into LaH3, MgH2, and La2Al5 by the absorption of hydrogen at 473 K.

关 键 词：intermetallic compound crystal structure X-ray diffraction hydrogenation characteristic 

分 类 号：TG139.7[一般工业技术—材料科学与工程]