Influence of vacuum heat treatment on structure and
micro-hardness of electroless Ni-P-SiC composite coating
micro-hardness of electroless Ni-P-SiC composite coating
(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)
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