Abstract:
Material performance in many industrial applications is strongly affected by the behavior of the surfaces. For example, corrosion response reactivity with environments, wear characteristics, and thermal properties are all critically dependent on surface character. The advantage of coating technology, in general is that it marries two dissimilar materials to improve the performance of the whole. There are two approaches to improve the carbide coating in plasma spraying. One method is the optimization of the spray parameters to improve the adhesion properties and decrease the solidification rate. The other method is using high W-carbide content powder (88% W-carbide + 12% Co).Our objective is not only to spray high content tungsten carbide (WC – 12wt% Co), but also to get the best optimum spray parameters, by studying the effect of these parameters in microstructure, adhesion, reaction layer, micro-hardness, corrosion and pore formation.
Keywords:
Thermal spray, A.P.S, spray parameters, thermo physical properties, WC-Co coatings, amorphous microcrystalline, and metastable phase.