Co-electrodeposition and characterization of Cu-Si3N4 composite coatings

SURFACE & COATINGS TECHNOLOGY

卷:205

Article

Robin, Alain¹  Pinheiro de Santana, Julio Cesar¹  Sartori, Antonio Fernando¹ 

[1] Univ Sao Paulo, Escola Engn Lorena, Dept Mat Engn, BR-12600000 Lorena, SP, Brazil

关键词: Copper;    Silicon nitride;    Electrocomposite;    Mechanical properties;    Corrosion behavior;   

DOI  :  10.1016/j.surfcoat.2011.03.142

来源: Elsevier

【 摘 要 】

Smooth copper coatings containing well-distributed silicon nitride particles were obtained by co-electrodeposition in acidic sulfate bath. The cathodic current density did not show significant influence on incorporated particle volume fraction, whereas the increase of particle concentration in the bath led to its decrease. The increase of stirring rate increased the amount of embedded particles. The microhardness of the composite layers was higher than that of pure copper deposits obtained under the same conditions due to dispersion-strengthening and copper matrix grain refinement and increased with the increase of incorporated particle volume fraction. The microhardness of composites also increased with the increase of current density due to copper matrix grain refining. The composite coatings presented higher strength but lower ductility than pure copper layers. Pure copper and composite coatings showed the same corrosion resistance in 0.5 wt.% H2SO4 solution at room temperature. (C) 2011 Elsevier B.V. All rights reserved.

【 授权许可】

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