研究了Ti 1+x Cr 1.2 Mn 0.8 (x=0.0, 0.1, 0.2, 0.3)系和 Ti 1+x Cr 1.2 Mn 0.8-y M y ( M =Fe, Ni, Cu, V, VFe; x=0.0, 0.1; y=0.1, 0.3)系AB 2型合金的储氢性能和晶体结构. XRD结果表明, 合金主相为C14(MgZn 2)型Laves相, 可以保证较高的吸、 放氢量. 通过$A$侧过化学计量以及$B$侧用Fe, Ni, Cu, V, VFe分别替代部分 Mn, 增加了点阵常数和晶胞体积, 降低了P-C-T曲线的滞后. 由相应数据 寻找出适合于金属氢化物氢压缩机的高压端储氢合金. 结果表明, 合金 TiCr 1.2 Mn 0.5 Fe 0.3与Ti 1.1 Cr 1.2 Mn 0.5 Cu 0.具有良好的储氢性能和压缩特性, 可以作为性能优良的高压端储氢合金.
The hydrogen storage properties and crystal structures of Ti 1+x Cr 1.2 Mn 0.8 (x=0.0, 0.1, 0.2, 0.3) and Ti 1+x Cr 1.2 Mn 0.8-y M y (M=Fe, Ni, Cu, V, VFe; x=0.0, 0.1; y=0.1, 0.3) have been studied systematically. XRD patterns proved that the two series of hydrogen storage alloys have the same crystal structure, C14(MgZn 2) typed Laves phase, which is suitable for hydrogen absorption and desorption with great amount. The lattice parameter a, c and cell volume V increase with increasing Ti content and substitution of Mn by Fe, Ni, Cu, V and VFe, while the hysteresis factors of P-C-T curves decrease. In order to develop hydrogen storage alloys for the metal hydride hydrogen compressor (MHHC), the effect of the substitution elements have been investigated, and the results show that both alloys, TiCr 1.2 Mn 0.5 Fe 0.3 and Ti 1.1 Cr 1.2 Mn 0.5 Cu 0.3 , have high hydrogen storage capacities and high compression ratios.
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