中文摘要：

在铜基体上利用等离子体喷涂技术制备了钨涂层面对等离子体材料,分析了喷涂功率对涂层致密性、传热性能、表面粗糙度等性能的影响,利用Nd∶YAG激光器对等离子体喷涂钨涂层瞬态高热负荷作用下的损伤行为进行研究。研究发现,瞬态高热负荷仅在涂层表面传递,涂层破坏主要发生在表面,涂层内部没出现明显损伤。损伤演变行为是：表面局部熔化、微裂纹形成,熔区扩展并向外挤压熔化的钨涂层、主次裂纹出现,涂层加热区沸腾并伴随蒸发、溅射现象。

英文摘要：

Tungsten（W）coating plasma facing material was fabricated on the copper（Cu）substrate by plasma spraying technology,and effects of the spraying intensity on coating density,heat transfer capability and surface roughness were analyzed.And it was discussed for the transient high heat load performance of tungsten coating by the Nd∶YAG laser.The results reveal that the transient high heat loading is transferred on the surface of coating,and coating failure appears in the surface with absence of obvious crack in coating.The damage behaviors of tungsten coating under the laser transient heat load are involved as follows：the micro-cracks and homogeneous melting,melting tungsten ejection which enhanced the erosion of tungsten due to the splash and evaporation.