激光重熔处理工艺对等离子喷涂热障涂层组织的影响

The effect of laser remelting parameter on the microstructure of plasma sprayed TBCs

研究了激光不同工艺参数对等离子喷涂ＺｒＯ２ 热障涂层组织结构的影响，结果表明：随着激光输出功率的增大，重熔组织由单一柱晶结构变为等轴晶＋ 柱晶双层结构。ＺｒＯ２ 层最高显微硬度也随之增大，这与等轴晶的存在有关。对两种不同晶体相结构进行ＸＲＤ分析表明：柱晶结构表现出一定的择优取向。

The effect of laser remelting parameters on the microstructure of plasma sprayed TBCs was investigated in this study.The results showed that the columnar ZrO 2 changed into epuitaxical crystal+columnar ZrO 2 when the laser output power increased.The highest microhardness of ZrO 2 were also enhanced.XRD results indicated the columnar ZrO_2 showed some orientation preference.