کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10655783 | 1005243 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Phase transformations in LaNi5âxCox-H2 system
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The interaction in LaNi5âxCox-H2 (x=0.6, 1.0, 1.5, and 2.0) system was studied at 20-955°C and pressure up to 6.2 MPa by means of differential thermal analysis (DTA), X-ray diffraction (XRD) analysis and thermodesorption of hydrogen in vacuum. The LaNi3.5Co1.5 and LaNi3.0Co2.0 (after heating at PH2=5-6.2MPa to 880-955°C) compounds transform into an amorphous state. The heating of LaNi3.0Co2.0 compound at PH2=5MPa to 810°C with holding for 1.5 h leads to a partial amorphization and partial decomposition (disproportionation) into LaHx and Co. The heating of LaNi3.5Co1.5 amorphous products in vacuum to 225 and 285°C results in both a partial and complete recrystallization into a phase with CaCu5-type structure and pure Co, respectively, but at 940°C they again are partial amorphous. The LaNi3.0Co2.0 amorphous products are completely recrystallized into a textured phase with CaCu5-type structure in vacuum at 880°C.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Intermetallics - Volume 13, Issue 11, November 2005, Pages 1220-1224
Journal: Intermetallics - Volume 13, Issue 11, November 2005, Pages 1220-1224
نویسندگان
I.I. Bulyk, A.M. Trostianchyn, V.G. Synyushko, I.V. Trostianchyn, V.M. Davydov,