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 11.02.2011   Карта сайта     Language По-русски По-английски
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11.02.2011






Preparation and characterization of Ni–P–nanoTiN electroless composite coatings


Liuhui Yua, Weigang HuangCorresponding Author Contact Information, a, E-mail The Corresponding Author and Xu Zhaoa



a College of Materials Science and Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, China




Received 15 July 2010; 


revised 4 January 2011; 


accepted 4 January 2011. 


Available online 12 January 2011.









Abstract



Ni–P–nanoTiN composite coatings were prepared successfully by electroless plating technique on AZ31 magnesium alloys. The composition, morphology, structure and phase transformation behaviour of the composite coatings were characterized respectively by using of scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and X-ray diffractometer (XRD). The micro-hardness and wear resistance of the nano composite coatings, both in as-deposited and heat treated states, were investigated. The results demonstrated that the composite coatings, which contained nano TiN particles, exhibited much better properties in hardness and wear resistance than the conventional Ni–P coatings and original AZ31 magnesium alloys. These enhancements of properties are attributed to the nano TiN particles uniformly distributed in the Ni–P matrix.









Research highlights



right triangle, filled The uniform Ni–P–nanoTiN coatings were successfully deposited on AZ31 magnesium alloys substrate by electroless plating after appropriate pretreatments for the substrate. right triangle, filled The Ni–P–nanoTiN composite coatings were composed of compact fine nodules uniform in size without any pores or cracks, and the nanoTiN particles uniformly distributed in the Ni–P matrix. right triangle, filled The introduction of nanoTiN particles in the Ni–P matrix significantly improve the wear resistance compared with the conventional Ni–P coatings and original AZ31 magnesium alloys.





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  • Chen Wev .  honorary member of ISSC science council

  • Harton Vladislav Vadim  honorary member of ISSC science council

  • Lichtenstain Alexandr Iosif  honorary member of ISSC science council

  • Novikov Dimirtii Leonid  honorary member of ISSC science council

  • Yakushev Mikhail Vasilii  honorary member of ISSC science council

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