High-temperature low-friction cobalt-free coating system for gate valves, ball valves, stems, and seats

A method of manufacturing a device includes thermally spraying tungsten carbine in feedstock that does not include Cobalt but that includes Nickel, Copper, or a Nickel-Copper alloy, the method improves the base coating toughness, anticorrosion, and antifouling properties for high load application in sea water and brackish water environments. Additionally, a Cobalt-free material lowers material costs and reduces the global demand of Cobalt. Providing a topcoat of a Silicon-doped DLC significantly reduces the topcoat brittleness of common DLC failures such as "egg shell" in high stress applications. Thus, high hardness, low friction applications may be tailored in high stress applications. 制造装置的方法包括热喷涂在不包含钴但包含镍、铜或镍-钴合金的原料中的碳化钨，所述方法改善在海水和微咸水环境中用于高负载应用的底涂层的韧性、抗腐蚀和防污性质。另外，无钴材料降低了材料成本并减少了对钴的全球需求。提供硅掺杂DLC的外涂层显著降低了高应力应用中常见DLC失效(如"蛋壳")的外涂层脆性。因此，可以在高应力应用中定制高硬度、低摩擦应用。