丁慧玲1
,
2
,
蒿建生1
,
3
,
朱惜林2
,
3
,
李媛2
,
韩树民1
,
2
,
张静武1
无机材料学报
doi:10.3724/SP.J.1077.2010.00647
为了改善La-Mg-Ni基贮氢合金的循环稳定性和综合电化学性能, 研究了电镀镍-钴合金对La0.88Mg0.12Ni2.95Mn0.10Co0.55Al0.10贮氢合金粉末表面形貌和电极电化学性能的影响. FESEM表明, 电镀处理后合金粉末表面沉积了球状的镍-钴合金颗粒. 电化学性能测试表明, 贮氢合金电极的放电容量、高倍率放电性能和循环稳定性均得到了显著改善. 200周循环时合金电极的容量保持率从未处理合金电极的60%提高到镀覆镍-钴合金的80%, 在放电电流密度1080mA/g下的高倍率放电性能提高了23%. 线性极化曲线和电化学阻抗分析结果显示, 包覆镍-钴合金后贮氢合金电极表面的电荷转移速率加快, 电催化活性提高.
关键词:
La-Mg-Ni基贮氢合金
,
surface treatment
,
electroplating
,
nickel-cobalt alloy
,
electrochemical characteristics
Zhaoxia PING
金属学报(英文版)
Ni-P-SiC composite coatings were electroplated on carbon steel substrate assisted by mechanical attrition (MA). The MA action was conducted by dispersing glass balls on the cathodic surface, vibrating in the horizontal direction. The experimental results show that, under the assistant of MA action, the adhesion of Ni-P-SiC coating on the steel substrate can be improved effectively, and the Ni-P-SiC coatings exhibit a crystallized structure and Ni-P matrix can combine tightly with SiC particles, and the hardness and corrosion resistance of these coatings increase markedly. During heat treatment, the defects produced in conventional Ni-P-SiC composite coatings can be avoided assisted by MA action. Both of the wear resistance and corrosion resistance of these coatings can be improved further.
关键词:
Ni-P-SiC composite coating
,
electroplating
,
mechanical attrition
蒋洪川
,
张金平
,
张万里
,
张文旭
,
彭斌
,
杨仕清
无机材料学报
采用光刻和电镀技术在5mm×5mm×0.2mm的硅片上设计并制备了2000个大小为50μm×50μm的CoNiMnP垂直各向异性永磁薄膜阵列,并对该薄膜陈列的组成、磁性能等进行了分析与测试.结果表明:薄膜阵列的组成为:Co90.32wt％、Ni7.83wt％、Mn0.74wt％、P1.11wt％,阵列垂直方向磁性能为:Hc=59.7kA/m,Br=0.53T,(BH)max=11.3kJ/m3;阵列水平方向磁性能为:Hc=27.8kA/m,Br=53715T,(BH)max=1.585kJ/m3.
关键词:
CoNiMnP永磁薄膜阵列
,
electroplating
,
vertical anisotropy
