Effects of B addition on the hydrogen absorption–desorption property of Ti_0.32Cr_0.43V_0.25 alloy

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• 作者：Sung-Wook Cho ; Jeong-Hyun Yoo ; Gunchoo Shim ; Choong-Nyeon Park ; Jeon Choi
• 关键词：Hydrogen storage alloy ; BCC alloy ; Ti– ; Cr– ; V alloy ; Boron addition
• 刊名：International Journal of Hydrogen Energy
• 出版年：2008
• 期刊代码：42_03603199
• 类别：ch
• 出版时间：March 2008
• 卷：33
• 期：6
• 页码：1700-1705
• 文件大小：2821 K

摘要

The effects of boron addition on the hydrogen absorption–desorption properties of the name="mml21">Ti_0.32Cr_0.43V_0.25 alloy were studied. Boron was added either directly or indirectly through a mother alloy name="mml22">Ti_0.75B_0.25. Direct boron addition caused the decrease in the titanium content of the BCC matrix through formation of Ti–B phases, resulting in the decrease in the lattice constant. Conversely, mother alloy addition increased the titanium content and the lattice constant of the matrix, for it contained enough titanium to contribute to the matrix even after forming the second phase TiB. Such lattice constant changes caused by boron addition resulted in drastic changes in hydrogen plateau pressure and great decrease in effective hydrogen storage capacity.