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Hydrogen storage properties of Mg_(76)Ti_(12)Ni_(12-x)Cr_x(x=0,3,6,9) alloys by mechanical alloying

机译:Mg_(76)Ti_(12)Ni_(12- X)Cr_x(X = 0.3,6,9)合金通过机械合金化储氢性能

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Mg_(76)Ti_(12)Ni_(12-x)Cr_x(x=0,3,6,9) alloys were synthesized by mechanical alloying(MA) approach and hydrogen storage properties of the alloys were investigated by X-ray diffraction, thermal analysis and pressure-composition isotherm measurement. It is found that Ti_2Ni phase and Mg_2Ni phase exist as the main phases in Mg_(76)Ti_(12)Ni_(12-x)Cr_x(x=0,3,6,9) alloys. The Mg_(76)Ti_(12)Ni_(12-x)Cr_x(x=0,3,6,9) alloys exhibit the hydrogen storage capacity of 4.61,4.30,4.21 and 4.12wt%, and the decomposition enthalpies of the alloy hydrides are 928.4, 898.3, 831.2 and 851.4J/g H_2, respectively. Mg_(76)Ti_(12)Ni_6Cr_6 alloy shows small hysteresis and fast hydrogen absorption rate. Proper Cr content can improve the performance of the Mg_(76)Ti_(12)Ni_(12-x)Cr_x(x =0,3,6,9) alloys.
机译:通过机械合金化(MA)合并,通过机械合金化合并(MA),通过X射线衍射研究了合金合金合金合金(MA)储氢性能,并通过X射线衍射研究了合金,X射线衍射研究,热分析和压力组成等温线测量。发现Ti_2NI相和Mg_2Ni相存在于Mg_(76)Ti_(12)Ni_(12-x)Cr_x(x = 0.3,6,9)合金中的主要相。 Mg_(76)Ti_(12)Ni_(12-x)Cr_x(x = 0,3,6,9)合金表现出4.61,4.30,4.21和4.12wt%的储氢容量和分解焓合金氢化物分别为928.4,898.3,831.2和851.4J / g H_2。 Mg_(76)Ti_(12)Ni_6Cr_6合金显示出小的滞后和快速吸收率。适当的Cr含量可以提高Mg_(76)Ti_(12)Ni_(12-x)Cr_x(x = 0,3,6,9)合金的性能。

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