【摘 要】
：
Nanostructured Ni-Al2O3 composite coatings incorporated with various contents of α-Al2O3 nano-particles were prepared on mild steel by using novel sediment
【机 构】
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State Key Laboratory of Materials Modification & School of Materials Science and Engineering,Dalian
【出 处】
：
Fifth International Conference on Surface Engineering(第五届表面工
论文部分内容阅读
Nanostructured Ni-Al2O3 composite coatings incorporated with various contents of α-Al2O3 nano-particles were prepared on mild steel by using novel sediment co-deposition (SCD) technique.For the comparison reason,the pure Nickel coating and the Ni-Al2O3 composite coatings were fabricated by means of conventional electroplating (CEP) technique.The electroplating was carried out in Watts bath without any additives except for nano α-Al2O3 suspension.The influence of the nano-particulates concentration,current density,and the mode of electroplating on the composite coatings were investigated.The results reveal that the weight percent of nano AI2O3 increases with increasing nano α-Al2O3 concentration in the plating bath and some agglomeration occurs on the surface of composite coatings.The current density affects the alumina content in the composite coatings as well.The nano α-Al2O3 incorporation in SCD technique is higher than that of CEP technique.The microhardness increases,while the wear rate decreases with increasingcontent of the Al2O3 in the composite coatings.
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