超音速等离子喷涂NiCoCrAlYTa-10，Al2O3涂层性能的研究

Properties of NiCoCrAlYTa-10，Al2O3 coating prepared by supersonic atmospheric plasma spraying

摘要:

采用超音速等离子喷涂技术在Cr28Ni48W5耐热钢基体上制备了NiCoCrAlYTa-10，Al2O3复合涂层,并对涂层的显微结构、孔隙率、结合强度、显微硬度,以及摩擦磨损性能进行了研究.结果表明,所制备的涂层结构致密,与基体的结合强度大于45 MPa,显微硬度可达500 Hv0.3以上,在常温和900 ℃下涂层的耐磨性能相较于基体得到显著提高,可满足高温下对涂层耐磨性能的要求.

Abstract:

In this study,the pre-mixed NiCoCrAlYTa-10，Al2O3 powders were thermally sprayed onto Cr28Ni48W5 heat resistant steel substrate by supersonic atmospheric plasma spraying (SAPS).The microstructure,properties including porosity,bonding strength,micro-hardness,friction and wear characteristics were systematically investigated.The results shows that the coating structure is quite dense, bonding strength is larger than 45MPa,and micro-hardness is higher than 500 Hv0.3.In particular, the wear performance at both room temperature and 900℃ environment were significantly improved compared with the substrate without coating.