ABSTRACT
Thermal.spraying.includes.a.group.of.processes.wherein.a.feedstock.material.(usually.a.powder,.but. also.in.the.form.of.a.wire.or.rod).is.heated.and.propelled.as.individual.molten.or.semimolten.particles. toward.a.substrate.surface..Thermal.spray.torches.are.employed.to.deposit.coatings.on.substrates.. These.thermal.spray.torches.have.a.heat.source.that.can.be.the.combustion.of.a.fuel.gas.(e.g.,.propylene.and.oxygen),.a.plasma.gas.(e.g.,.Ar/H2),.or.an.electric.arc..At.the.heat.source.of.the.thermal.spray.
