Springer New York;Boston: Springer Science and Business Media LLC
摘要:
摘要： Composite coating techniques are becoming increasingly popular owing to their peculiar performances. In this study, the wear resistance of thermally sprayed Ni-MoS 2 composite coatings on an AISI 1020 steel substrate was investigated. Ni-MoS 2 composite powder (size: 60-90 μm) containing 25 wt.% of dispersed MoS 2 was prepared by electroless plating. Ni-MoS 2 composite coatings were then prepared by HVOF thermal spraying. The coatings were characterized by structural, surface morphological, and compositional analyses by means of microhardness tests, SEM/EDS, XRD, and ICP-AES. For the evaluation of their anti-wear properties, the composites were subjected to ball-on-disk dry wear tests based on the ASTM G99 standard at room temperature. Experimental results showed that some of the MoS 2 content dispersed in the Ni-based composite coating burnt away during the high-temperature spraying process, thereby reducing the MoS 2 concentration in the coating. In the wear test, the weight loss in the Ni-MoS 2 composite coating was minimal under a low load (<15 N) but increased rapidly with increasing load (>30 N). The average wear rate of the coatings was found to be ~1/40 times that of a Ni coating, showing that the wear resistance of the composite coatings was significantly improved by MoS 2 addition. 其他題名： J Therm Spray Tech 出版者： Boston: Springer Science and Business Media LLC 出版日期： 2015-02-01 出處： Journal of Thermal Spray Technology, 2015-02, Vol.24 (3), p.489-495 版權： ASM International 2014 識別號： ISSN: 1059-9630 識別號： EISSN: 1544-1016 識別號： DOI: 10.1007/s11666-014-0208-9
