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Indexed by:期刊论文

Date of Publication:2014-03-01

Journal:JOURNAL OF EXPERIMENTAL NANOSCIENCE

Included Journals:SCIE、EI、Scopus

Volume:9

Issue:3

Page Number:299-309

ISSN No.:1745-8080

Key Words:microelectroforming; pulse reverse current (PRC); microhardness; wear resistance

Abstract:Nanocrystalline nickel was produced by pulse reverse microelectroforming. The pulse microelectroforming was also performed for the comparative purposes. The surface morphology and microstructure of electroformed nickel layers were investigated by scanning electron microscopy and X-ray diffractometry. The microhardness of nickel layers was measured with a Vickers microhardness tester. The friction and wear experiments for nickel layers were performed on a friction and wear tester. The results indicate that the nickel layers prepared by pulse reverse microelectroforming exhibit higher density and their grain sizes in the nanometer range. The nickel layers with fine grains, high microhardness and better wear resistance are obtained at positive current density of 20A/dm(2) and negative current density of 2A/dm(2). The microhardness and wear resistance of nickel layers are improved as the positive and negative current densities are increased.