Effect of boron additive on the cycle life of low-Co AB5-type electrode consisting of alloy prepared by cast and rapid quenching |
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| Affiliation: | 1. Department of Functional Material Research, Central Iron and Steel Research Institute, 76 Xuanyuannan Road, Haidian District, Beijing 100081, China;2. Department of Material Science and Engineering, Baotou Iron and Steel University of Technology, Baotou 014010, China;1. State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China;2. National Engineering Research Center for Flue Gas Desulfurization, Sichuan University, Chengdu 610065, China;1. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, PR China;2. Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, PR China;1. Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Departamento de Química, Brazil;2. Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Brazil;3. Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Departamento de Física, Brazil;4. Faculdade de Ciências e Tecnologia, Universidade Estadual Paulista, Departamento de Física, Brazil |
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| Abstract: | In order to modify the cycle stability of low-Co AB5-type alloy, a trace of boron was added in MmNi3.8Co0.4Mn0.6Al0.2 hydrogen storage alloy. The low-Co AB5-type alloys MmNi3.8Co0.4Mn0.6Al0.2Bx(x=0, 0.1, 0.2, 0.3, 0.4) were prepared by cast and rapid quenching. The cycle lives and microstructures of the as-cast and quenched alloys were measured and analyzed. The effects of boron additive on the microstructures and cycle lives of as-cast and quenched alloys were investigated comprehensively. The obtained results showed that the addition of boron could dramatically enhance the cycle lives of the as-cast and quenched alloys. When boron content x increases from 0 to 0.4, the cycle lives of the as-cast alloys were increased from 118 to 183 cycles, and for as-quenched alloys with quenching rate of 38 m/s from 310 to 566 cycles. |
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