Structure and hydrogen absorption property of Mg2Ni-Ti alloy powders prepared by mechanical alloying

被引：0
|
作者：
Lin, CK [1 ]
Wang, CK [1 ]
Lin, HC [1 ]
Lee, PY [1 ]
机构：
[1] Feng Chia Univ, Dept Mat Sci & Engn, Taichung 407, Taiwan
来源：
METASTABLE, MECHANICALLY ALLOYED AND NANOCRYSTALLINE MATERIALS | 2005年 / 24-25卷
关键词：
mechanical alloying; hydrogen absorption; EXAFS;
D O I：
10.4028/www.scientific.net/JMNM.24-25.419
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
In the present study, pure Mg, Ni, and Ti powder mixtures were mechanically alloyed as compositions of (Mg2Ni)(100-x)Ti-x (x=0, 2.5, 5, 7.5 or 10 respectively). The structure evolution of as-milled powders were examined by X-ray diffraction and synchrotron X-ray absorption spectroscopy. For all compositions investigated, nanocrystalline (Mg2Ni)(100-x)Ti-x alloy powders were synthesized at the end of milling. The hydrogen absorption properties of the 15h as-milled powders were evaluated by a Sieverts type apparatus at a temperature of 300, 325 and 350 degrees C respectively. Improvement of the hydrogen absorption properties was observed with the titanium additions. At a temperature of 350 degrees C and a H-2 pressure of 50 atm, the (Mg2Ni)(95)Ti-5 as-milled powders exhibited a maximum hydrogen absorption value and reversible content of 3.88 and 3.01 wt.% respectively.
引用
收藏
页码：419 / 422
页数：4
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