Characterization and frictional behavior of nanostructured Ni-W-MoS2 composite coatings

SURFACE & COATINGS TECHNOLOGY

卷:204

Article

Cardinal, M. F.¹  Castro, P. A.¹  Baxi, J.³  Liang, H.³  Williams, F. J.^1,2 

[1] TENARIS Res & Dev Ctr, Surface Chem & Coatings Dept, RA-2804 Campana, Argentina

[2] Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Quim Inorgan Analit & Quim Fis, Buenos Aires, DF, Argentina

[3] Texas A&M Univ, Dept Mech Engn, College Stn, TX 77843 USA

关键词: Nanostructured;    Coating;    Electrodeposition;    Solid lubricant;    Ni-W;    MoS2;   

DOI  :  10.1016/j.surfcoat.2009.06.037

来源: Elsevier

【 摘 要 】

Ni-W-MoS2 composite coatings were obtained by pulse plating from a Ni-W electrolyte containing suspended MoS2 particles. The coating composition, morphology, crystalline structure, microhardness and frictional behavior were studied as a function of MoS2 concentration. The results obtained in this study indicate that co-deposited lubricant particles strongly influenced the composite Ni-W coating properties. It was found that increasing co-deposited MoS2 diminished tungsten content in the coating and consequently increased the average grain size. Ni-W nanostructured coatings with high MoS2 content have a porous sponge-like structure, high surface roughness and irregular frictional behavior. However, the friction coefficient of Ni-W coatings is reduced to half its value with low MoS2 content. (C) 2009 Elsevier B.V. All rights reserved.

【 授权许可】

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