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利用等离子体喷涂技术制备了钨涂层面对等离子体材料,并对涂层基本性能进行了表征,主要包括气孔率、相对密度、结合强度、热导率、硬度分布,进而研究主动水冷钨涂层在热负荷服役条件下的损伤演变行为。研究发现,直接水冷钨涂层内部层与层之间的开裂、分层是涂层失效的原因,损伤演变过程为柱状晶体再结晶并长大、层间微裂纹出现、裂纹扩展和气孔出现、最后材料分层、失效。间接水冷钨材料的热负荷性能受到很大限制,且疲劳性能降低,失效形式是涂层开裂或脱落,甚至铜基体整体熔化。
The plasma coating technology was used to prepare the tungsten coating facing the plasma material, and the basic properties of the coating were characterized, including porosity, relative density, bonding strength, thermal conductivity and hardness distribution, and then the active water-cooled tungsten coating Damage Evolution Behavior of Layers under Thermal Load. It is found that the delamination and delamination of the inner layer of the direct water-cooled tungsten coating is the cause of the failure of the coating. The damage evolution process is the recrystallization and growth of columnar crystals, the appearance of microcracks, the propagation of cracks and the appearance of pores, The final material stratification, failure. Indirect water-cooled tungsten material thermal load performance is greatly limited, and fatigue performance decreases, the failure of the form of cracking or peeling coating, and even the overall melting of the copper matrix.