(南京農(nóng)業(yè)大學 工學院，南京 210031)
摘 要: 利用機械合金化原理，在304不銹鋼板表面制得AlCoNiFeCr高熵合金涂層。采用XRD、SEM、EDS、顯微硬度測試和電化學腐蝕等技術(shù)分析涂層的組織結(jié)構(gòu)、顯微形貌、力學性能和耐腐蝕性能，并初步探討合金層的形成機理。結(jié)果表明：隨著球磨時間的增加，涂層厚度先增大后減小；當球磨時間為9 h時涂層最厚，平均厚度約為110 μm；當球磨時間為12 h時，涂層部分剝落。涂層的硬度明顯高于基體的，且從表面到基體硬度呈梯度下降，硬度最高值達590HV0.1約為基體硬度的3倍。電化學腐蝕試驗表明，涂層有效增加了基體的耐腐蝕性能。
關(guān)鍵字: 機械合金化；高熵合金涂層；顯微硬度；耐腐蝕性
（College of Engineering, Nanjing Agricultural University, Nanjing 210031, China）
Abstract:AlCoNiFeCr high entropy alloy coating was prepared successfully on the surface of 304 stainless by mechanical alloying. The microstructure, mechanical properties and corrosion resistance of the coating were analyzed by XRD, SEM, EDS, microhardness test and electrochemical etching. The formation mechanism of the alloy layer was also discussed. The results show that with milling time increasing, the thickness of the coating increases at first and then decreases. The coating prepared by milling for 9 h is the densest with average thickness of 110 μm. When the milling time is prolonged to 12 h, part of the coating is peeled off. The micro-hardness of coating is significantly higher than that of the substrate, and declines gradually from the top surface to inner substrate. The maximum micro-hardness of the coating is up to 590HV0.1, about three times that of the substrate. Electrochemical corrosion tests show that the coating effectively increases the corrosion resistance of the matrix.
Key words: mechanical alloying; high entropy alloy coating; microhardness; corrosion resistance
