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LaNi5-xAlx (x=0~1.2)合金的循環(huán)儲氫性能研究
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江蘇省高校自然科學研究項目 (10KJB430017)；國家重點基礎研究發(fā)展計劃 (2010CB631305)


Study on Cyclic Hydrogen Storage Properties of LaNi5-xAlx (x=0-1.2) Alloys
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    摘要:

    通過真空感應熔煉法制備了LaNi5-xAlx (x=0, 0.25, 0.75, 1.2)儲氫合金，并對其微觀結構、力學性能、循環(huán)吸放氫性能及抗粉化性能進行了研究。結果表明，Al元素的加入能夠明顯改善合金晶體結構穩(wěn)定性和儲氫容量穩(wěn)定性；隨著Al含量的增加，合金的抗粉化性能呈現(xiàn)先減弱后增強的趨勢；合金的力學性能和儲氫容量共同影響著其抗粉化性能，其中力學性能是最主要的影響因素；在普通高純氫氣氛下，LaNi5-xAlx (x=0~1.2)合金的容量衰減主要是由于材料自身原因造成，很可能是發(fā)生了歧化反應

    Abstract:

    LaNi5-xAlx (x=0, 0.25, 0.75, 1.2) alloys were prepared by vacuum induction melting. The microstructure, mechanical property, cyclic stability of hydrogen absorption/desorption and pulverization resistance of the alloys were investigated. The results demonstrate that the addition of Al element can markedly improve the stability of crystal structure and hydrogen storage capacity of the alloys; with increase of the Al content, the pulverization resistance of the alloys becomes worse at first, and then is improved; mechanical property, which is the main factor, and hydrogen storage capacity jointly influence pulverization resistance property of the alloys; in the atmosphere of ordinary high-purity hydrogen, the main reason for the capacity attenuation of the LaNi5-xAlx (x=0-1.2) alloys should be their intrinsic properties, mostly maybe the disproportionation reaction

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程宏輝,潘金平,陳 偉,陳德敏,楊 柯. LaNi5-xAlx (x=0~1.2)合金的循環(huán)儲氫性能研究[J].稀有金屬材料與工程,2011,40(11):1921~1925.[Cheng Honghui, Pan Jinping, Chen Wei, Chen Demin, Yang Ke. Study on Cyclic Hydrogen Storage Properties of LaNi5-xAlx (x=0-1.2) Alloys[J]. Rare Metal Materials and Engineering,2011,40(11):1921~1925.]
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  • 收稿日期:2011-03-30
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