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冷卻速率對TiV2.1Ni0.4Zr0.06Cu0.03Cr0.1合金相結(jié)構(gòu)及電化學(xué)性能的影響
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陜西省自然科學(xué)基金(SJ08ZT04-1)


Effect of Quenching Rates on the Phase Structure and Electrochemical Properties of TiV2.1Ni0.4Zr0.06Cu0.03Cr0.1 Alloys
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國家“863”項目(2006AA06Z124)；國家“973”項目(2007CB613606)；攀枝花市科委資助項目(2008CY-G-6)

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    摘要:

    研究了冷卻速率對TiV2.1Ni0.4Zr0.06Cu0.03Cr0.1合金的相結(jié)構(gòu)及電化學(xué)性能的影響。XRD、EBI、EDS分析表明，合金主要由V基固溶體主相和以網(wǎng)狀分布于主相晶界的Ti2Ni基第二相組成。電化學(xué)測試表明，冷卻速率較快時合金的最大放電容量、交換電流密度、極限電流密度和循環(huán)穩(wěn)定性都得到提高。而高倍率性能下降是由于在較大的電流密度下快冷樣品中第二相催化相在堿液中的溶解析出速率較快造成的

    Abstract:

    he phase structures and electrochemical properties of TiV2.1Ni0.4Zr0.06Cu0.03Cr0.1 alloys at different quenching rates were investigated. XRD, EBI and EDS analyses indicate that the alloys mainly consist of a V-based solid solution main phase and a network structure of Ti2Ni secondary phase along grain boundaries of the main phase. Electrochemical measurements show that the maximum discharge capacity, the exchange current density, limiting current density and the cycling stability are all increased by higher quenching rate. The high-rate dischargeablity (HRD) is decreased because of the quick dissolution of the secondary catalytic phase in alkali solution at higher discharge current density

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吳怡芳,柳永寧,方建峰,馬曉波,陳元振,劉 博,張玉萍,方 媛,李成山,奚正平.冷卻速率對TiV2.1Ni0.4Zr0.06Cu0.03Cr0.1合金相結(jié)構(gòu)及電化學(xué)性能的影響[J].稀有金屬材料與工程,2010,39(12):2237~2241.[Wu Yifang, Liu Yongning, Fang Jianfeng, Ma Xiaobo, Chen Yuanzhen, Liu Bo, Zhang Yuping, Fang Yuan, Li Chengshan, Xi Zhengping. Effect of Quenching Rates on the Phase Structure and Electrochemical Properties of TiV2.1Ni0.4Zr0.06Cu0.03Cr0.1 Alloys[J]. Rare Metal Materials and Engineering,2010,39(12):2237~2241.]
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  • 收稿日期:2010-02-28
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