等离子喷涂Al2O3对不锈钢抗烧蚀性能的影响

摘要

Stainless steel coated with plasma sprayed Al2O3 is prepared by coating plasma spraying the NiCrAlY-Al2O3 high temperature compound on one side of 201 stainless steel. A cirular anti-ablation experiment is conducted to investigate its anti-ablation, and the morphology and elemental composition of coated and uncoated sides are tested with SEM,EDS and other methods. The results show that:201 stainless steel binds well with a high-temperature plasma sprayed compound coating. After high temperature flame ablation, while the smoothness of the coating surface declined, uncoated surface has oxide formation and ferroalloy balls. Ablation degree is much smaller than uncoated stainless steel, and NiCrAlY-Al2O3 compound coating on stainless steel substrate temperature plays a thermal protective role in enhancing anti-ablation capacity of stainless steel 201.%在201不锈钢板的单面上采用等离子喷涂NiCrAlY-Al2O3抗烧蚀复合涂层，通过循环烧蚀实验研究了喷涂样品的抗烧蚀性能。利用SEM和EDS等方法，测试了高温火焰烧蚀前后样品涂层面和无涂层面的形貌和元素组成。实验和测试结果表明：NiCrA-lY-Al2O3抗烧蚀复合涂层与201不锈钢结合性好；高温火焰烧蚀后，样品涂层面平整性有所下降，无涂层面有氧化物生成并有合金小球析出，且喷涂样品的烧蚀程度明显小于未喷涂样品，说明NiCrAlY-Al2O3抗烧蚀复合涂层对201不锈钢基材起到了抗烧蚀保护作用，提高了201不锈钢的抗烧蚀性能。