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WO3 Fabrication and Thermal Spray Coating of WC-Co using Recycled Ammonium Paratungstate (APT)
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  • Journal title : Transactions of Materials Processing
  • Volume 24, Issue 4,  2015, pp.287-292
  • Publisher : The Korean Society for Technology of Plasticity
  • DOI : 10.5228/KSTP.24.4.287
 Title & Authors
WO3 Fabrication and Thermal Spray Coating of WC-Co using Recycled Ammonium Paratungstate (APT)
Chung, J. K.; Kim, S. J.; On, J. H.; Moon, H. S.; Pee, J. H.; Ha, T. K.; Park, S. Y.;
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 Abstract
The possibility of chemical precipitation for recycled ammonium paratungstate (APT) was studied. WO3 particles were synthesized by chemical precipitation method using a 1:2 weight ratio of APT:DI-water. At the 500℃ sintering temperature, the X-ray diffraction results showed that APT completely decomposed to WO3. For the granulated powder WC-Co, vacuum heat treatment at proper temperatures increases tap density and flow-ability. Hardness of the WC-Co thermal spray coating layer was measured in the range HV 831~1266. Spray conditions for the best characteristic values were an oxygen flow rate=1500 scfh, a fuel flow rate = 5.25gph and a gun distance = 320mm.
 Keywords
WO3;APT;Chemical Precipitation;Hard metal;Thermal Spray Coating;
 Language
Korean
 Cited by
 References
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