| LaNi4.25Al0.75储氢合金的改性 |
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| 引用本文： | 万伟华,唐有根,卢周广,朱志节,谢正和.LaNi4.25Al0.75储氢合金的改性[J].中南大学学报(自然科学版),2007,38(1):107-111. |
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| 作者姓名： | 万伟华 唐有根 卢周广 朱志节 谢正和 |
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| 作者单位： | 中南大学化学化工学院，中南大学化学化工学院，中南大学化学化工学院，中南大学化学化工学院，中南大学化学化工学院 湖南长沙，410083中国航天集团公司梅岭化工厂，贵州遵义，563003，湖南长沙，410083，湖南长沙，410083，湖南长沙，410083，湖南长沙，410083 |
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| 摘 要： | 为了提高LaNi4．25Al0．75合金的储氢性能,采用退火、表面镀铜和表面包覆SiO2对合金进行改性,并对处理前、后合金的微观结构和吸放氢性能的变化进行研究。研究结果表明,退火消除了LaNi4．25Al0．75合金中的偏析,减少了内应力,使合金具有平坦的吸氢平台;表面镀铜处理加快了合金的吸、放氢速度,但吸氢含量略有降低,另外,镀铜合金抗粉化性能加强,经10次吸、放氢循环后没有出现粉化现象;表面包覆SiO2前、后,合金的吸氢量变化不大,抗粉化性能加强,经10次吸、放氢循环后没有出现粉化现象。
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| 关 键 词： | 储氢合金 热处理 包覆 抗粉化性能 |
| 文章编号： | 1672-7207（2007）01-0107-05 |
| 修稿时间： | 2006-08-15 |
Modification of LaNiAl hydrogen storage alloys |
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| WAN Wei-hua,TANG You-gen,LU Zhou-guang,ZHU Zhi-jie,XIE Zheng-he.Modification of LaNiAl hydrogen storage alloys[J].Journal of Central South University:Science and Technology,2007,38(1):107-111. |
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| Authors: | WAN Wei-hua TANG You-gen LU Zhou-guang ZHU Zhi-jie XIE Zheng-he |
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| Institution: | 1. School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China; 2. Meiling Chemical Plant, China Aerospace Science and Industry Co., Zunyi 563003, China |
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| Abstract: | The modification of microstructure and hydrogen absorption/desorption properties of LaNi4.25Al0.75 hydrogen storage alloys were carried out by high-temperature annealing,surface Cu coating,and surface SiO2 coating.The results show that annealing can eliminate segregation in the alloys and lessen internal pressure,and smoothen the hydrogen absorption/desorption platform of the alloys.Surface Cu coating enhances the speed of hydrogen absorption/desorption considerably,and the hydrogen absorption voltage reduces a little,but no evident pulverization can be found in this alloy after 10 hydrogen absorption/desorption cycles.Alloys with SiO2 coating also show excellent pulverization resistance,no evident pulverization can be found in this alloy after 10 hydrogen absorption/desorption cycles and absorption voltage is almost the same as nude LaNi4.25Al0.75 alloys. |
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| Keywords: | hydrogen storage alloys annealing surface coming pulverization resisting capability |
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