Effect of Annealing Temperature on Gaseous Hydrogen Absorption and Desorption Performance of(La,Y)-Mg-Ni-Al Alloy AITranslate

3李平,张骏,翟富强,马光,徐丽,曲选辉.Effect of annealing treatment on the anti-pulverization and anti-corrosion properties of La_(0.67)Mg_(0.33)Ni_(2.5)Co_(0.5) hydrogen storage alloy[J].稀土学报：英文版,2015,33(4):417-424. 被引量：4

2翟亭亭,杨泰,袁泽明,许胜,张羊换.铸态La_(1-x)Sm_xMg_(3.6)Co_(0.4)(x=0～0.4)合金的贮氢性能（英文）[J].稀有金属材料与工程,2016,45(8):1938-1942.

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Chinese Library Classification Number:TG139.7[一般工业技术—材料科学与工程]

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In order to find the suitable annealing temperature of La0.62Y0.2Mg0.18Ni3.30Al0.20 alloy with excellence gaseous hydrogen absorption and desorption performance,phase composition and metallographic microstructure of the as-cast and annealed alloy were analyzed by XRD and OM,surface morphology of alloy particles before and after hydrogen absorption and desorption was observed by SEM,and PCT characteristics and dynamic performance of hydrogen absorption and desorption of the alloy were tested by pressurecomponent-temperature（PCT）apparatus.The results show that annealed alloy at 900℃contains the main phases of LaNi5and（La,Y,Mg）2（Ni,Al）7and Ni3 Y residual phase.With annealing temperature increasing,the main phases are unchanged but Ni3 Y phase is transformed into Y2Ni7 phase,and its cell volume increases at first and then decreases and FWHM firstly decreases and then increases within 41-43°diffraction angle.Compared with the as-cast alloy and the annealed alloy at 900℃,1 000℃and 1 050℃,the annealed alloy at 950 ℃ has better microstructure uniformity,and higher capacity and average velocity and smaller hydrogen pressure and hysteresis coefficient of hydrogen absorption and desorption.Based on comprehensive comparison,the suitable annealing temperature is 950 ℃for the alloy in our experiments.