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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    Special 1    November 2007

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Influence of vacuum heat treatment on structure and
micro-hardness of electroless Ni-P-SiC composite coating
LONG Shi-guo(龙士国)1, MA Zeng-sheng(马增胜) 1, HU Wen-bin(胡文彬)2, ZHOU Yi-chun(周益春)1

1. Key Laboratory of Low Dimensional Materials & Application Technology, Ministry of Education,
Faculty of Materials, Photoelectronic & Physics, Xiangtan University, Xiangtan 411105, China;
2. State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200030, China

Abstract:The electroless Ni-P-SiC composite coatings were prepared and the influence of vacuum heat treatment on its structure and properties was analyzed. The Ni-P-SiC composite coatings were characterized by morphology, structure and micro-hardness. The morphology and structure of the Ni-P-SiC composite coatings were studied by scanning electron microscopy (SEM) and X-ray diffractometry (XRD), respectively. A great deal of particles incorporation and uniform distribution were found in Ni-P-SiC composite coatings. XRD results show a broad peak of nickel and low intensity SiC peaks present on as-deposited condition. Micro-hardness of as-deposited Ni-P-SiC composite coatings is improved greatly, and the best micro-hardness is obtained after heat treatment in a high vacuum at 400 ℃.

 

Key words: electroless
 
   

ISSN 1672-7029
CN 43-1423/U

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