کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1281937 1497668 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis, characterization and hydrogenation of ZrFe2-xNix (x=0.2,0.4,0.6,0.8) alloys
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Synthesis, characterization and hydrogenation of ZrFe2-xNix (x=0.2,0.4,0.6,0.8) alloys
چکیده انگلیسی
Hydrogen storage properties and structural properties in ZrFe2-xNix (x=0.2,0.4,0.6,0.8) alloys, prepared by arc melting in argon atmosphere, have been investigated. Powder XRD study shows that the lattice constants and the unit cell volume of ZrFe2-xNix (x=0.2,0.4,0.6,0.8) alloys having C15 Laves phase cubic structure decreases with increasing Ni content due to the smaller atomic radius of Ni compared to Fe. Surface morphology and elemental composition of the alloys were investigated by SEM and EDX. Hydrogen absorption pressure-composition (P-C) isotherms were investigated in the ranges 303K⩽T⩽373K and 0.5bar⩽P⩽50bar using a Sievert type apparatus. The P-C isotherms show the single plateau region in the temperature and pressure range studied. The plateau pressure increases with increasing Ni content for a given temperature. The entropy and enthalpy of dissolved hydrogen in ZrFe2-xNix-H (x=0.2,0.4,0.6,0.8) have been calculated by means of the vant Hoff plot and the variation of these parameters with hydrogen content is discussed with respect to the existence of α, α+β, and β phase regions in the P-C isotherms.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 32, Issue 16, November 2007, Pages 3965-3971
نویسندگان
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