电沉积法制备钴与镧、铈的非晶态合金及其晶化动力学研究

无机材料学报

电沉积法制备钴与镧、铈的非晶态合金及其晶化动力学研究

史鸿运; 邓洁; 张云黔; 董俊

贵州大学化学系贵阳 550025

收稿日期:2001-10-15 修回日期:2002-01-18 出版日期:2002-11-20 网络出版日期:2002-11-20

Preparation of Amerphous Alloys in Cobalt with Lanthanum, Cerium by Electrodeposition and Its Crystallization Kinetics

SHI Hong-Yun; DENG Jie; ZHANG Yun-Qian; DONG Jun

Department of Chemistry; Guizhou University; Guiyang 550025; China

Received:2001-10-15 Revised:2002-01-18 Published:2002-11-20 Online:2002-11-20

摘要/Abstract

摘要： 稀土元素(La,Ce)的标准还原电位较负,在水溶液中很难电沉积出来,通过选用适合的络合剂和工艺条件制备出Co-La,Co-La-P,Co-Ce,Co-Ce-P以及Co-P合金,并具有非晶态的结构.本文对这几种非晶态合金进行了晶化动力学研究,用差示扫描量热法(DSC)测定了它们的晶化活化能以及所遵守的动力学方程.

关键词: 稀土（La, Ce）Co合金, 非晶态镀层, 电沉积, 晶化动力学

Abstract: Rare-earth elements (La, Ce) have lower standard equilibrium potential than hydrogen and are very difficult
to electrodeposition from aqueous solution. Co-La, Co-La-P, Co-Ce, Co-Ce-P and Co-P alloys deposits having amorphous structure were obtained from aqueous solutions by
using optimized electroplaing solutions and process conditions. The crystallization kinetics of these amorphous alloy coatings was
investigated. The crystallization activation energy and kinetics equation of five kinds amorphous coatings were determined
by DSC method. The results indicate that the crystallization activation energy of Co-P, Co-La, Co-Ce, Co-La-P, Co-Ce-P amorphous
coatings are 185.7,386.5, 383.0, 587.3, 535.5kJ·mol^-1respectively. The crystallization mechamism of four kinds amorphous coatings may be expressed
by kinetics equation:
(dα/dT=（A/Φ)e^-E/RT(1-α)

Key words: rare-earth （La, Ce） Co alloys, amorphous coating, electrodepositionrystallization kinetics

中图分类号:

O614

史鸿运,邓洁,张云黔,董俊. 电沉积法制备钴与镧、铈的非晶态合金及其晶化动力学研究[J]. 无机材料学报.

SHI Hong-Yun,DENG Jie,ZHANG Yun-Qian,DONG Jun. Preparation of Amerphous Alloys in Cobalt with Lanthanum, Cerium by Electrodeposition and Its Crystallization Kinetics[J]. Journal of Inorganic Materials.

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