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Fabrication of self-lubricating cobalt coatings on metal surfaces

Hilla Friedman1, Orly Eidelman1, Yishay Feldman2, Alexey Moshkovich3, Vladislav Perfiliev3, Lev Rapoport3, Hagai Cohen2, Alexander Yoffe2 and Reshef Tenne1

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Composite coatings of Co + fullerene-like WS2 nanoparticles on stainless steel substrate were obtained through electroless deposition, using DMAB (dimethyl borane complex, 97%) as the reducing agent, and by electroplating in acidic solution. Phase analysis results show that the coatings consist of Co and the fullerene-like WS2 nanoparticles alone. Tribological measurements show reduced wear and friction of the composite coatings as compared with the pure cobalt film or the stainless steel substrate.


PACS

81.16.-c Methods of nanofabrication and processing

81.40.Pq Friction, lubrication, and wear

62.20.Qp Friction, tribology, and hardness

81.15.Pq Electrodeposition, electroplating

61.48.-c Structure of fullerenes and related hollow molecular clusters

62.25.-g Mechanical properties of nanoscale systems

Subjects

Surfaces, interfaces and thin films

Condensed matter: structural, mechanical & thermal

Nanoscale science and low-D systems

Dates

Issue 11 (21 March 2007)

Received 3 November 2006, in final form 3 January 2007

Published 7 February 2007



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