کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1624393 | 1516419 | 2008 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Formation of a tetragonal phase hydride in Ti-Mo-H system
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
The structural relationship between the hydride phases in Ti-Mo-H solid solution system (Mo content up to 15 at% in the alloy) during dehydrogenation process under annealing has been studied by conventional and in situ X-ray powder diffraction and transmission electron microscopy (TEM) analysis. During dehydrogenation, the saturated hydrides of the Ti-Mo alloys with fcc δ-phase structure transfer into bcc β-phase at higher temperatures. An associated hydrogen concentration reduction for the δ-phase hydride is observed in the process. However, as the hydrogen concentrations decrease to certain values (H/M â¼Â 1.1-1.7), the unsaturated δ-phase formed at high temperature would become unstable at lower temperature, and transfer into a tetragonal phase (denoted the É-phase here). Unlike that of the É-phase in Ti-H system, the phase transition does not occur for the saturated δ-phase with hydrogen concentration close to the stoichiometric limit. The hydrogen concentration of this É-phase hydride is in between that of the tetragonal γ and É-phase in Ti-H system, but more close to the γ-phase. The occurrence region of this É-phase expands along with the increase of the Mo content in the alloys. The phase has a lattice similar to that of the É-phase in Ti-H system with corresponding fct unit-cell c/a < 1.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 458, Issues 1â2, 30 June 2008, Pages 161-165
Journal: Journal of Alloys and Compounds - Volume 458, Issues 1â2, 30 June 2008, Pages 161-165
نویسندگان
Erdong Wu, Xu Xu, Xuezhong Yuan, Xiumei Guo, Sucheng Wang,