AgSn合金粉末非抛物线性内氧化研究  

Nonparabolic Rate Law of Internal Oxidation Process for AgSn Alloy Powders

作　　者：江珍雅[1] 陈敬超[1] 

机构地区：[1]昆明理工大学云南省新材料制备与加工重点实验室,云南昆明650093

出　　处：《贵金属》2006年第2期22-26,共5页Precious Metals

基　　金：云南省科技攻关(2000B-03);国家科技攻关(2001BA326C)联合资助项目

摘　　要：采用逐步氧化增重法,研究了AgSn合金粉末中低温内氧化的动力学行为,结果表明其内氧化动力学曲线明显不同于高温氧化的抛物线定律,中低温氧化的各个不同阶段的内氧化机制符合不同的规律,区别于高温氧化,本实验合金粉末的中低温内氧化过程动力学由化学反应和产物层扩散相互作用控制。Using the method of progressive oxidation weight gain, the kinetic behavior of internal oxidation of AgSn alloy powders at moderate and low temperature range was investigated. The kinetic curves of internal oxidation for AgSn alloy powders in our study are quite different from the parabolic law showed in Wagner＇s model. The internal oxidation mechanisms in different stages for moderate and low temperature internal oxidation of AgSn alloy powders accord with different laws. The control link for kinetic behavior of internal oxidation of AgSn alloy powders at moderate and low temperature is mutural action of chemical reaction and diffusion of product layers.

关 键 词：金属材料 AgSn合金粉末 内氧化 非抛物线定律 

分 类 号：TG146.32[一般工业技术—材料科学与工程]