کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7921751 1511751 2018 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Design and characterizations of novel Nb-ZrCo hydrogen permeation alloys for hydrogen separation applications
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Design and characterizations of novel Nb-ZrCo hydrogen permeation alloys for hydrogen separation applications
چکیده انگلیسی
Novel Nb-ZrCo hydrogen permeable alloys are developed as potential membrane materials for hydrogen separation applications. Microstructures, hydrogen permeation behavior and the resistance to hydrogen embrittlement of NbxZr(95-x)/2Co(105-x)/2 (x = 15 … 40) alloys are studied. Three different microstructures are found in these alloys, particularly (a) the primary ZrCo phase and eutectic {bcc-(Nb, Zr) + B2-ZrCo} for x < 25, (b) the fully eutectic for x = 25 and (c) the primary bcc-(Nb,Zr) and eutectic for x > 25. Alloys with Nb content between 20 and 30 at.% present higher permeation results. Increase in Nb content lead to higher hydrogen permeability (Φ), but poorer embrittlement resistance, which can be attributed to an increase in hydrogen solubility. Nb25Zr35Co40 exhibits an appropriate balance between hydrogen permeability and embrittlement resistance. Permeability is improved apparently and hydrogen embrittlement resistance is also further strengthened for directionally solidified (DS) Nb25Zr35Co40, which is mainly attributed to a decrease in hydrogen solubility and the significant increment of hydrogen diffusivity. The present work demonstrates that the newly developed alloys could be used as potential candidate for hydrogen separation applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 212, 15 June 2018, Pages 282-291
نویسندگان
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