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

页码：419 / 422

页数：4

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