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Electrodeposition of Metallic Nanowires in Nanoporous Polycarbonate Films
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Analysis on the Microstructure of Ceramic Coating Layer Fabricated by Plasma Electrolytic Oxidation
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Improvement in Wear Resistance of Nano WC-Co Coatings Fabricated by Detonation Gun Spraying
p.1264
Corrosion Characteristics of TiN and ZrN Coated Ti-Nb Alloy by RF-Sputtering
p.1270
Zn-Al-Mg Coatings: Thermodynamic Analysis and Microstructure Related Properties
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Microstructural Features of Plasma Nitrided Molybdenum Alloy Steel
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Improvement in Wear Resistance of Nano WC-Co Coatings Fabricated by Detonation Gun Spraying

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Abstract:

Nano structured WC-Co coatings with carbide size of 100−200nm were fabricated by detonation gun spraying. The fabricated nano coatings showed improved hardness and wear resistance compared to micron WC-Co coatings. Considerable phase decomposition of WC to W2C and amorphous phase in nano coatings was detected, which is known to degrade wear resistance of coatings. In order to improve the wear resistance of the coatings by recovering of dissociated carbide phases, post heat treatment was conducted in Ar environment at temperature range of 400−900°C. Harness, fracture toughness and wear resistance of nano coatings were significantly improved by post heat treatment. The improved properties were elucidated and discussed in terms of microstructure and phase compositions.

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THERMEC 2006 View Preview

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Periodical:

Materials Science Forum (Volumes 539-543)

Pages:

1264-1269

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.539-543.1264

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Online since:

March 2007

Authors:

S.Y. Park, Moon Chul Kim, Chan Gyung Park

Keywords:

Thermal Spray Coating, WC-Co, Wear

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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