Journal of Inorganic Materials ›› 2012, Vol. 27 ›› Issue (8): 795-799.DOI: 10.3724/SP.J.1077.2012.11575

• Research Paper • Previous Articles     Next Articles

Preparation and Characterization of Cu Coated SiC Composite Powders by in-situ Chemical Deposition

SHI Jin-Gang1,2,3, YAO Hui1,2, CHEN Ming-Hai1, LIU Ning2, LI Qing-Wen1   

  1. (1. Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou 215123, China; 2 School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China; 3. No. 12 Institute, China Shipbuilding Industry Corporation, Xingping 713102, China)
  • Received:2011-09-09 Revised:2011-11-24 Published:2012-08-20 Online:2012-07-09
  • About author:SHI Jin-Gang. E-mail: jgshi2009@sinano.ac.cn
  • Supported by:

    Production and Research Collaborative Innovation Project of Jiangsu Province (BY2009129); Natural Science Foundation of Jiangsu Province (BK2009565); Suzhou Science and Technology Program (SWG0905)

Abstract: A facile one-step in-situ chemical deposition method was introduced to synthesize Cu-Coated SiC composite powders, using [Cu(NH3)4]2+ ions as copper source and N2H4·H2O as reductant, respectively. Scanning electronic microscope (SEM), X-Ray diffraction (XRD), Fourier transform infrared spectroscope (FT-IR) and Zeta potential were used to investigate the structure, morphology and composition of the prepared core/shell composite powders. The corresponding formation mechanism was proposed based on the comparative study. It is revealed that the SiO2 film on the surfaces of pre-oxidated SiC particles can effectively enhance the adsorption of [Cu(NH3)4]2+ ions toward the negatively charged surface, which is favorable to the following in-situ reduction by N2H4·H2O around SiC particles. Nearly continuous Cu coating can be formed by changing the reaction process. The concentration of [Cu (NH3)4]2+ ions and reaction temperature affect the reaction rate and coating structure. The process parameters are optimized to obtain the best coating structure with [Cu(NH3)4]2+ ions concentration of 0.2 mol/L and reaction temperature of 70℃, respectively.

Key words: SiC, Cu, ceramic-metal composite, in-situ chemical deposition

CLC Number: