＜Cobalt Nickel Chromium Aluminum Yttrium (CoNiCrAlY) Coating＞
Thermally sprayed coatings have been widely applied in industrial components. One of the most critical and widely used applications of thermal sprayed coating is thermal barrier coating (TBC). Thermal barrier coatings consist of metallic bond coat and ceramic top coat that are normally applied onto superalloy substrate. Two common methods to apply the ceramic coatings are electron beam assisted physical vapor deposition (EB-PVD)and air plasma spraying (APS). High velocity oxygen fuel (HVOF) spray process is recently a technique been used to produce denser bond coat. In HVOF spraying technique, alloy powder is melted and propelled at supersonic velocity towards the surface. For HVOF process, low-porosity coatings with high bond strength and fine as-sprayed surface finishes was form from a extremely high kinetic energy and controlled thermal energy.
CoNiCrAlY is a mostly used alloy that has outstanding performance to generate a protective oxide scale that helps to resist chemical attack from corrosive environments. Typical uses of HVOF sprayed CoNiCrAlY include :
‧Oxidation and hot corrosion resistance for gas turbine components, including airfoils, turbine buckets, turbine blades and shrouds
‧Corrosion-resistant bond coat for thermal barrier coatings and ceramic clearance control coatings
‧Exhaust manifolds, ducts and components used in flue gas and fly ash systems
Plus Metal Tech (PMT) provides services of protective and functional coatings, such as wear-resistant, corrosion-resistant, erosion-resistant, conductive and insulative coatings. Our thermal coating service is fully customized. Process choices depend on customer’s demands and the chosen materials. For any questions about surface treatment and enhancement, please do not hesitate to give us the message or email. We welcome for the discussion with you.