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Microstructures and properties of Cr–Cu/W–Cu bi-layer composite coatings prepared by mechanical alloying

  • Jiaping Zhang , Xiaomei Feng , Yifu Shen , Cheng Chen and Cuiyuan Duan
Published/Copyright: June 5, 2016
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 107 Issue 6

Abstract

Cr–Cu/W–Cu bi-layer coatings with composite structures were fabricated by means of mechanical alloying. The Cr–Cu layer and the W–Cu layer were deposited successively and the as-synthesized bi-layer coating was made up of an inner Cr–Cu layer and an outer W–Cu layer. Microstructures, chemical and phase compositions of the as-prepared coatings were characterized. The results indicated that the bonding between the inner coating and the substrate was improved with the increase of Cu in the raw powder. The annealing treatment of the inner Cr–Cu layer was beneficial to the bonding between the inner Cr–Cu coating and the outer W–Cu coating layer. Mechanical properties such as microhardness, friction and wear resistance were tested. The as-synthesized coating could effectively improve the hardness and wear resistance of the Cu substrate.

Keywords: Mechanical alloying; Cr–Cu/W–Cu bi-layer coating; Composite; Microstructure
*Correspondence address, Professor Yifu Shen, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, 29 Jiangjun Road, Nanjing 210016, PR China, Tel.: +86 025 84895940, Fax: +86 25 52112626, E-mail:

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Received: 2015-10-25
Accepted: 2016-01-18
Published Online: 2016-06-05
Published in Print: 2016-06-10

© 2016, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111372
Keywords for this article
Mechanical alloying; Cr–Cu/W–Cu bi-layer coating; Composite; Microstructure

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Effect of Peierls stress and strain-hardening parameters on EMR emission in metals and alloys during progressive plastic deformation
  5. Relaxation and diffusion barriers at step edges of Cu, Ag and Au homo- and heterogeneous systems: Case of (100) facet
  6. Simulation analysis on impurity distribution in mc-Si grown by directional solidification for solar cell applications
  7. Experimental investigation and thermodynamic calculation of the Mg–Sr–Zr system
  8. Microstructures and properties of Cr–Cu/W–Cu bi-layer composite coatings prepared by mechanical alloying
  9. Innovative approach to protect magnesium powder during sintering
  10. Friction stir welding of foamable AlSi7 reinforced by B4C
  11. Incorporation of SiC particles in FS welded zone of AZ31 Mg alloy to improve the mechanical properties and corrosion resistance
  12. Effects of fiber volume fraction on strain of piezoelectric fiber composites
  13. Dry wear behavior of cooling-slope-cast hypoeutectic aluminum alloy
  14. Short Communications
  15. In-situ grown interwoven NiSe on Ni foam as a catalyst for hydrazine oxidation
  16. DGM News
  17. DGM News
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