机械镀锌层锌粉颗粒间结合机理的探讨  

Bonding Mechanism of Zn Powder in Mechanically Deposited Zn Coating

作　　者：王胜民[1] 何明奕[1] 刘丽[2] 彭增华[1] 赵晓军[1] 

机构地区：[1]昆明理工大学材料保护研究所,云南昆明650093 [2]云南民族大学化学系,云南昆明650031

出　　处：《金属热处理》2006年第1期71-74,共4页Heat Treatment of Metals

基　　金：国家自然科学基金项目(50561003);云南省应用基础研究基金项目(1999E0026M)

摘　　要：采用SEM观察了初始锌粉和机械镀锌层的断口形貌,分析了镀层断口锌粉颗粒结合处的成分分布及双金属冷焊结合机理,探讨了镀层中锌粉颗粒间的结合机制。从细晶强化角度解释了镀层具有较高结合强度的原因。分析结果表明,锌粉颗粒之间容易形成金属键,发生键合。表面活性物质部分残留在镀层中,起到桥接作用。锌粉颗粒之间的键合和表面活性物质的桥接是锌粉颗粒结合的主要途径。The Primary zinc powder and the coating fracture was observed with scanning electron microscopy（SEM）,composition distribution of zine powder at coating fractune and bimetal cold welding mechanism were analyzed,and bonding mechanism of zine particles in coating was discused.At the same time,the reason for high bonding strength of coating was explained by grain refinement theory.The results show that metallic bond is easily formed between zinc powders,and residual surfactant is bridging between zinc powders.The bonding between zinc powders mainly depends on metallic bonding and bridging from surfactant.

关 键 词：机械镀锌 结合机理 冷焊 

分 类 号：TG174.44[金属学及工艺—金属表面处理]