(1. 大連理工大學(xué) 材料與工程學(xué)院，大連 1160242. 大連理工大學(xué) 物理與光電工程學(xué)院，大連 1160243. 大連理工大學(xué) 三束材料改性教育部重點實驗室，大連 116024)
摘 要: 由非自耗電弧熔法制備Al62Cu25.5Fe12.5單相準(zhǔn)晶合金，再將該合金進行球磨處理制備了Al62Cu25.5Fe12.5二十面體準(zhǔn)晶粉末，并以其為磨料配制研磨膏，對軟金屬Al進行表面研磨處理。結(jié)果表明：經(jīng)準(zhǔn)晶研磨處理后的純Al表面平整無劃痕，粗糙度為Ra=0.306，達到一般精研要求。與傳統(tǒng)金剛石磨料不同，這種準(zhǔn)晶研磨材料在機械研磨時可避免造成對軟金屬表面的二次劃傷，且表現(xiàn)出對軟金屬基體表面缺陷的修復(fù)能力。
關(guān)鍵字: Al62Cu25.5Fe12.5準(zhǔn)晶; 磨料; 修復(fù)效應(yīng)
（1. School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China;2. School of Physics and Optoelectronic Engineering, Dalian University of Technology, Dalian 116024, China;3. Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Ministry of Education,Dalian University of Technology, Dalian 116024, China）
Abstract:Al62Cu25.5Fe12.5 icosahedral quasicrystal (IQC) single-phase alloy was prepared by non-consumed electric arc melting method, then the Al62Cu25.5Fe12.5 IQC powders were obtained by treating the single-phase alloy with ball mill. The ball-milled Al62Cu25.5Fe12.5 IQC powders were used to make a ploshing agent with appropriate ratios with other ingredients. The polishing experiments were done on industrial pure Al. The results show that, after polishing, the sample surface reaches a good roughness of Ra=0.306, and no fatal scratch marks are oberved on it. The general requirement of precise surface grinding is met. Comparing with commercial diamond grinding agents, the surface seondary scratch is avoided, and easpecially, the new grinding material is found to deliver a ‘repairing’ effect on the marcoscopic surafce defects of pure Al.
Key words: Al62Cu25.5Fe12.5 quasicrystals; grinding material; repairing effect
