Journal ArticleDOI
Study on electroless Ni-P-ZrO2 composite coatings on AZ91D magnesium alloys
TLDR
In this paper, Ni-P-ZrO2 composite coatings on AZ91D magnesium alloys were developed and their characteristics were investigated, and the experimental results showed that they were uniform and compact.Abstract:
Electroless Ni-P-ZrO2 composite coatings on AZ91D magnesium alloys was developed and their characteristics were investigated. The experimental results showed that the composite coatings were uniform and compact. The hardness of Ni-P-ZrO2 composite coatings reached the maximum value at 350 degrees C heat treatment, and then decreased at 400 degrees C. The nickel phosphor alloys provided solution strengthening and precipitation strengthening, while the ZrO2 nanoparticles provided dispersion hardening, making the composite coatings harder than that of Ni-P coatings. The wear resistance of Ni-P-ZrO2 composite coatings was obviously superior to Ni-P coatings, especially with longer wear time, which can be attributed to the dispersion strengthening and load support effect of ZrO2 in the coatings. The Ni-P-ZrO2 coatings exhibited better corrosion resistance than that of Ni-P coatings owing to codeposition of ZrO2 together with NiP leading to a more compact composite coating.read more
Citations
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Recent progress in the development and properties of novel metal matrix nanocomposites reinforced with carbon nanotubes and graphene nanosheets
Sie Chin Tjong,Sie Chin Tjong +1 more
TL;DR: In this article, the authors focus on the recent development in the synthesis, property characterization and application of aluminum, magnesium, and transition metal-based composites reinforced with carbon nanotubes and graphene nanosheets.
Journal ArticleDOI
A novel electroless plating of Ni–P–TiO2 nano-composite coatings
Weiwei Chen,Wei Gao,Yedong He +2 more
TL;DR: In this paper, a new processing concept was developed to produce nano-structured metal-matrix composite coatings, which combines sol-gel and electroless plating techniques to prepare highly dispersive oxide nano-particle reinforced composite materials.
Journal ArticleDOI
Surface treatments for controlling corrosion rate of biodegradable Mg and Mg-based alloy implants.
TL;DR: A comprehensive review of recent research focusing on surface treatment techniques utilised to control the corrosion rate and surface integrity of Mg-based alloys in both in vitro and in vivo environments is presented.
Journal ArticleDOI
Characterization of calcium-modified zinc phosphate conversion coatings and their influences on corrosion resistance of AZ31 alloy
TL;DR: In this article, two kinds of phosphate conversion coatings, including zinc phosphate coating and zinc-calcium phosphate coating, were prepared on the surface of AZ31 alloy in phosphate baths.
Journal ArticleDOI
Wear and scratch behaviour of electroless Ni-P-nano-TiO2: Effect of surfactants
TL;DR: In this article, the effects of surfactants on microhardness, scratch, wear and friction behavior of the Ni-P-nano-TiO 2 composite coatings were investigated.
References
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Journal ArticleDOI
Protective coatings on magnesium and its alloys — a critical review
J.E. Gray,B. Luan +1 more
TL;DR: In this paper, the state of the art in coating and surface modification technologies, applied to magnesium-based substrates for improved corrosion and wear resistance, are discussed, including electrochemical plating, conversion coatings, anodizing, gas phase deposition processes, laser surface alloying/cladding and organic coatings.
Journal ArticleDOI
Corrosion of magnesium
G. L. Makar,J. Kruger +1 more
TL;DR: Magnesium alloys have high strength/weight ratios, but poor corrosion resistance affects the viability of increased magnesium usage in aerospace and other applications as discussed by the authors, and this review approaches the p...
Journal ArticleDOI
Corrosion of AZ91D magnesium alloy with a chemical conversion coating and electroless nickel layer
Hongwei Huo,Ying Li,Fuhui Wang +2 more
TL;DR: In this paper, a chemical conversion treatment and an electroless nickel plating were applied to AZ91D alloy to improve its corrosion resistance, which was verified by immersion test and potentiodynamic polarization test in 3.5 wt.% NaCl solution.
Journal ArticleDOI
Electroless nickel-plating on AZ91D magnesium alloy: effect of substrate microstructure and plating parameters
Rajan Ambat,Wei Zhou +1 more
TL;DR: In this article, the effect of microstructure and plating parameters on AZ91D alloy was investigated using scanning electron microscopy (SEM) and energy dispersive X-ray analysis.
Journal ArticleDOI
Hardness, friction and wear characteristics of nickel-SiC electroless composite deposits
TL;DR: In this article, electroless Ni-SiC composite deposits with various amounts of SiC have been prepared and characterized, and the study of the mechanical (hardness) and tribological (friction resistance and wear) properties of the co-deposits were carried out using a ball on disk tribometer.