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Title: The effect of spraying parameters on micro-structural properties of WC-12%Co coating deposited on copper substrate by HVOF process

High Velocity Oxy-Fuel (HVOF) thermal sprayed coatingmade from Tungsten Carbide (WC) isconsidered as one of the most durable materials as wear resistance for industrial applications at room temperature. WC coating offers high wear resistance due to its high hardness and tough matrix imparts. The coating properties strongly depend on thermal spray processing parameters, surface preparation and surface finish. In this investigation, the effect of variousHVOF process parameters was studied on WC coating properties. The WC-12%Co coating was produced on Copper substrate. Prior to coating, theCopper substrate surface was prepared by grit blasting. WC-12%Co coatings were deposited on Coppersubstrates with varying process parameters such as Oxygen gas pressure, Air pressure, and spraying distance. Microstructure of coating was examined using Scanning Electron Microscope (SEM) and characterization of phasespresentin the coating was examined by X-Ray Diffraction (XRD). Microhardness of all coatingswas measured by VickerMicrohardness tester. At low Oxygen Pressure(10.00 bar), high Air pressure (7bar) and short nozzle to substrate distance of 170mm, best coating adhesion and porosity less structure isachieved on Coppersubstrate.
Authors:
 [1] ;  [2] ; ; ;  [1] ;  [3]
  1. Fusion Rector Material Development & Characterization Division, Institute for Plasma Research, GIDC Electronics Estate, Sec-25, Gandhinagar-382016 (India)
  2. (India)
  3. Metallurgical & Materials Engineering Department, Indus University, Ahmedabad-382115 (India)
Publication Date:
OSTI Identifier:
22488861
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1675; Journal Issue: 1; Conference: AMRP-2015: 4. national conference on advanced materials and radiation physics, Longowal (India), 13-14 Mar 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ADHESION; COBALT; COPPER; EXPLOSIVE FRACTURING; MATRIX MATERIALS; MICROHARDNESS; MICROSTRUCTURE; OXYGEN; POROSITY; SCANNING ELECTRON MICROSCOPY; SUBSTRATES; SURFACES; TEMPERATURE RANGE 0273-0400 K; TUNGSTEN CARBIDES; WEAR RESISTANCE; X-RAY DIFFRACTION