کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
830071 | 1470350 | 2013 | 6 صفحه PDF | دانلود رایگان |
Electroless Ni–P–Al2O3 nanocomposite coatings were deposited on steel surface from a plating solution with alumina (α-Al2O3) nano-particles prepared by mechanical milling in a high energy density ceramic stirred bead mill. The size and specific surface area of the nano-sized alumina particles were determined by acoustic particle sizer and nitrogen adsorption surface area analyzer. The phase structure, morphology and elemental composition of Ni–P–Al2O3 nano-composite coatings were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS), respectively. Effect of the nanoparticle concentration in the plating bath on the micro-hardness, wear resistance and corrosion resistance of the as-deposited and the heat-treated coatings was investigated. The results show that the incorporation of alumina nanoparticles can enhance the micro-hardness and wear resistance of electroless Ni–P–Al2O3 nanocomposite coatings, but affect the corrosion resistance.
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► Al2O3 nanoparticles (13 nm) were prepared by milling in high-energy density stirred bead mill.
► We prepared Ni–P–Al2O3 nanocomposite coatings by electroless plating using the nanoparticles.
► Incorporation of the nanoparticles improved wear resistance of the electroless coating.
► The nanoparticles prepared by milling can be used for the coatings instead of those by chemical methods.
Journal: Materials & Design - Volume 47, May 2013, Pages 443–448