Effect of Thermal Treatment on Composite Coatings of Electroless Ni-P/Nano-Diamond on Pure Aluminum Substrate

Ping Liu; C.H. Zhu; Yong Wie Zhu; J. Hui

doi:10.4028/www.scientific.net/KEM.499.68

Paper Titles

Deposition and Application of CVD Diamond Films on the Interior-Hole Surface of Silicon Carbide Compacting Dies
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Determination of Constitutive Equation Parameters for Orthogonal Cutting through Pressure Bar Tests and FEA Method
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Effect of Drawing Parameters on Elongation of Micro Copper Tube with Straight Grooves
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Effect of Thermal Treatment on Composite Coatings of Electroless Ni-P/Nano-Diamond on Pure Aluminum Substrate
p.68

Evaluation for Adhesion Strength of High Performance Coatings by Pressure-Pushing Method and Analysis of Finite Elements
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FEA on the Roller Bracing Structure of Pellet Mill
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 499Effect of Thermal Treatment on Composite Coatings...

Effect of Thermal Treatment on Composite Coatings of Electroless Ni-P/Nano-Diamond on Pure Aluminum Substrate

Abstract:

Recently, researches of composite coatings deposited on the aluminum substrate have been increasing. The Ni-P/nano-diamond composite coating deposited by means of direct electroless deposition on pure aluminum substrate was investigated. The effects of thermal treatment on the surface morphology, microstructure, micro-hardness, and adhesion and elements diffusion of composite coating were examined. Results show that the structure transformation of composite coating from amorphous/microcrystalline into crystalline occurs after thermal treatment and that its micro-hardness increases with the heating temperature and its maximal hardness is 1254Hv after being treated at 350°C for 1h. A diffusion layer forms after thermal treatment due to the inter-diffusion of Al, Ni and P elements at the interface, which leads to the improvement of adhesion strength between the coating and the substrate.

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Periodical:

Key Engineering Materials (Volume 499)

Pages:

68-73

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.499.68

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Online since:

January 2012

Authors:

Ping Liu, C.H. Zhu, Yong Wie Zhu, J. Hui

Keywords:

Aluminum Substrate, Direct Electroless Deposition, Electroless Composite Coating

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