2013•Applied Mechanics and MaterialsOpen access

Deposition Mechanism and Wear Resistance Nano Ni-Al2O3 Composite Coatings

Dong Mei Jiang, Ying Ming Shen, Wei Jun Zhang, Tie Jun Liu

Abstract

Nano Ni-Al2O3 composite coatings were prepared on pure copper substrate. The surface morphology and distribution of nano-particles of coatings were observed by SEM, the components of the coatings analyzed by X-ray diffractometer, and the microhardness of coatings tested by HXD-1000 microhardness tester. The microstructure of nano Ni-Al2O3 composite coating was different from that of the electrodeposited nickel coatings. The inserted Al2O3 particle can effectively hinder the growth of crystals. The microhardness of composite coatings around the inserted particles was much higher than that of electrodeposited nickel coatings. The more the size of Al2O3 decreased, the more the microhardness and wear resistance of the composite coatings increased.

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Available abstract

Key concepts: Indentation hardness, Materials science, Diffractometer, Composite number, Microstructure, Nickel, Metallurgy, Coating