CFD Simulation Of An HVOF Process For The Optimization Of WC-Co Protective Coatings

Microstructured and nanostructured WC-Co composite coatings can be deposited by HVOF starting from commercial composite powders. However, the reduction in powder size of the ceramic reinforcement is responsible for a significant increase of WC reactivity, enhancing the decarburation phenomena taking...

Full description

Saved in:
Bibliographic Details
Published in:WIT Transactions on Engineering Sciences 2003-01, Vol.39
Main Authors: Bartuli, C, Cipri, F, Valente, T, Verdone, N
Format: Article
Language:English
Subjects:
Cemented carbides
Ceramic powders
Cobalt
Combustion
Computational fluid dynamics
Flame spraying
Gas flow
Optimization
Organic chemistry
Protective coatings
Thermal degradation
Tribology
Tungsten carbide
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Microstructured and nanostructured WC-Co composite coatings can be deposited by HVOF starting from commercial composite powders. However, the reduction in powder size of the ceramic reinforcement is responsible for a significant increase of WC reactivity, enhancing the decarburation phenomena taking place within the spraying torch, and potentially affecting the mechanical and tribological properties of the deposited coatings. In order to limit the thermal degradation of the reinforcement, it is therefore necessary to strictly control the main combustion parameters of the torch, such as composition, velocity and temperature of the combustion gases. Using a CFD code, thenno-chemical and gas-dynamic properties of the gas flow within an HVOF JP-5000 (Hobart Tafa Inc.) torch w
ISSN:1746-4471
1743-3533
DOI:10.2495/SURF030081