Effects of the addition of Pd on the hydrogen absorption–desorption characteristics of Ti33V33Cr34 alloys |
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| Authors: | Rong-Ruey Jeng Sheng-Long Lee Che-Wei Hsu Yuan-Pang Wu Jing-Chie Lin |
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| Affiliation: | aDepartment of Mechanical Engineering, National Central University, Jhongli, Taiwan;bInstitute of Materials Science and Engineering, Department of Mechanical Engineering, National Central University, Jhongli, Taiwan;cMaterials Research and Electro-Optics Division, Chung-shan Institute of Science and Technology, Armaments Bureau, M.N.D., Taiwan |
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| Abstract: | The hydrogen absorption–desorption performance of the body-centered-cubic (bcc) Ti–V–Cr–Pd alloys have been investigated. Ti33V33Cr34 ingots with 0, 0.05, 0.5 at.% Pd were prepared by arc melting. X-ray diffraction (XRD) revealed that all of these alloys were homogeneous bcc solid solutions. Pd-containing (0.05, 0.5 at.% Pd) Ti–V–Cr alloys have better initial activation properties than those without Pd, and the desorption plateau pressure of the (Ti33V33Cr34)99.5Pd0.5 alloy was substantially higher than that of the alloy without Pd. It is also found that the hysteresis difference is smaller in these alloys and degradation of hydrogen absorption capacity becomes steady after the 25th cycling test. (Ti33V33Cr34)99.5Pd0.5 alloy exhibits large hydrogen absorption and desorption capacity of up to 3.42 and 2.07 mass% at 353 K, respectively. |
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| Keywords: | Hydrogen storage materials bcc alloy Ti– V– Cr alloy |
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