SHS hydrogenation of group IV metals as studied by time-resolved XRD
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- 作者：D. Yu. Kovalev (1)
A. E. Sytschev (1)
I. D. Kovalev (1)
A. I. Dekhtyar (2)
I. V. Moiseeva (2) - 关键词：SHS hydrogenation ; metal hydrides ; time ; resolved XRD ; reaction mechanism
- 刊名：International Journal of Self-Propagating High-Temperature Synthesis
- 出版年：2014
- 出版时间：October 2014
- 年：2014
- 卷：23
- 期：4
- 页码：198-202
- 全文大小：588 KB
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A. E. Sytschev (1)
I. D. Kovalev (1)
A. I. Dekhtyar (2)
I. V. Moiseeva (2)
1. Institute of Structural Macrokinetics and Materials Science, Russian Academy of Sciences, Chernogolovka, Moscow, 142432, Russia
2. Kurdyumov Institute of Metallophysics, National Academy of Sciences, Kiev, 03680, Ukraine - ISSN：1934-788X
文摘
Reactions of SHS hydrogenation in Me-H systems (Me = Ti, Zr, Hf) were explored by time-resolved XRD. The SHS reaction yielding TiH2 was found to proceed in the following stages: α-Ti ?α-Ti[H] ?β-Ti[H] ?δ-TiH2 (here β-Ti[H] stands for solid solution of hydrogen in β-Ti). SHS hydrogenation of Zr took place by the following scheme: α-Zr ?β-Zr[H] ?δ-ZrH1.5 ??-ZrH2. The α-Hf ?δ-HfH x transformation happened in one stage, without formation of intermediate β-Hf[H]. Our results shed new light on the kinetics and mechanism of SHS hydrogenation of metals.