کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1624417 | 1516419 | 2008 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hydrogen solution properties in a series of amorphous Zr-Hf-Ni alloys at elevated temperatures
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Amorphous alloys are anticipated as new membrane materials for high purity hydrogen production, as substitutes for expensive palladium alloys. For amorphous Zr-Ni-based alloys reported to date, hydrogen permeability increases with Zr content. Hydrogen solution properties in a series of amorphous Zr-Hf-Ni ternary alloys were measured carefully using the Sieverts method and residual hydrogen measurements to investigate the reason. Results indicate that hydrogen solubility in the ternary alloys increases with increasing Zr to improve hydrogen permeability, not because of the geometrical atomic structure but because of higher hydrogen affinity of Zr than that of Hf. Increased permeability with Zr in other amorphous Zr-Ni-based alloys is also expected to be attributable to the same reason. Additionally, hydrogen was found with low mobility, and was not removable even after 10Â h evacuation at 573Â K; the importance of decreasing low mobility hydrogen as a countermeasure against hydrogen embrittlement was pointed out. Equilibrium hydrogen concentration was found not to obey Sieverts' law with respect to hydrogen pressure. Rather, it was linear roughly to the quarter power. Parameters to reproduce pressure-composition isotherms were determined using Kirchheim's theory.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 458, Issues 1â2, 30 June 2008, Pages 307-312
Journal: Journal of Alloys and Compounds - Volume 458, Issues 1â2, 30 June 2008, Pages 307-312
نویسندگان
Shigeki Hara, Hong-Xiang Huang, Misaki Ishitsuka, Masakazu Mukaida, Kenji Haraya, Naotsugu Itoh, Koichi Kita, Komei Kato,