(吉林大學(xué) 南嶺校區(qū) 材料科學(xué)與工程學(xué)院，長(zhǎng)春 130025)
摘 要: 采用復(fù)合粉末加壓成型的方法，在銅基體表面上復(fù)合了納米Cu-Zn合金表面層，獲得了具有納米結(jié)構(gòu)表面層的銅基復(fù)合材料。對(duì)基體與表面的界面結(jié)構(gòu)、納米表面層的微觀結(jié)構(gòu)、相變特征及其對(duì)材料表面性能的影響進(jìn)行了研究。結(jié)果表明，納米表面層與基體結(jié)合良好，納米表面層在經(jīng)350℃左右退火可獲得最佳表面性能，顯微硬度可達(dá)到 290HV左右，耐磨性明顯優(yōu)于基體材料。對(duì)納米Cu-Zn合金的相變過(guò)程分析表明，Cu-Zn納米晶體β′相中彌散α相沉淀物的析出有助于強(qiáng)化納米Cu-Zn結(jié)構(gòu)表層。
關(guān)鍵字: 納米表面層；復(fù)合材料；耐磨性；相變
nanocrystalline Cu-Zn surface
（College of Materials Science and Engineering，Jilin University，
Changchun 130025，China）
Abstract:Copper-matrix composites with nanocrystalline Cu-Zn surface layer were obtained by using composite powder compacting process. The interface between matrix and surface layer，the nanocrystalline surface layer microstructure and phase transformation，and their effects on nanocrystalline surface were studied. It is shown that better interface bond can be obtained and nanocrystalline surface having the best property can be obtained after annealing at 350℃. The hardness of nanocrystalline surface is up to HV290 and the wear resistance property is better than that of the matrix. The precipitation of α phase from β′ phase can contribute to improving the property of Cu-Zn nanocrystalline surface layer .
Key words: nanocrystalline surface layer；composites；wear resistance；phase transformation
