Hydriding properties of Mg-Al-Zn quasicrystal powder produced by mechanical alloying

被引：0
|
作者：
Bystrzycki, Jerzy [1 ]
Polanski, Marek [1 ]
Malka, Iwona E. [1 ]
Komuda, Aneta [1 ]
机构：
[1] Mil Univ Technol, Fac Adv Technol & Chem, PL-00908 Warsaw, Poland
来源：
ZEITSCHRIFT FUR KRISTALLOGRAPHIE | 2009年 / 224卷 / 1-2期
关键词：
Quasicrystal; Mg-Al-Zn; Mechanical alloying; Hydriding properties; Phase stability; FRANK-KASPER PHASE; HYDROGEN STORAGE; TI45ZR38NI17; MG51ZN20; SYSTEM;
D O I：
10.1524/zkri.2009.1066
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
The stable quasicrystal belonging to the Bergman class based on Mg-Al-Zn (Mg(44)Al(15)Zn(41)) was prepared by the mechanical alloying of elemental powders. The phase structure, chemical composition and hydriding properties of the obtained quasicrystal were investigated by XRD, SEM, EDS, DSC and the volumetric Sievert method. Our results have shown that the Mg(44)Al(15)Zn(41) quasicrystal is unstable while hydriding above 200 degrees C and decomposes irreversibly into different Mg-Zn based intermetallic compounds. While being hydrided at 200 degrees C, where the quasicrystal is stable, Mg(44)Al(15)Zn(41) decomposes mainly into the MgZn(2) based intermetallic compound with MgH(2) but above 300 degrees C, where the 2/1 approximant is stable, Mg(44)Al(15)Zn(41) transforms mainly into the Frank-Kasper phase with MgH(2).
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收藏
页码：105 / 108
页数：4
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