氧燃充枪比对爆炸喷涂CoCrAlYTa涂层组织和性能的影响

摘要

采用爆炸喷涂工艺制备了CoCrAlYTa涂层,借助SEM,EDS,显微硬度分析和结合强度测试等手段研究了氧燃充枪比对所制备涂层组织结构和性能的影响.结果表明,随着氧燃充枪比的增加,爆轰温度和爆轰速率不断提高,使涂层由均匀结构向层状结构转变,涂层的孔隙率不断降低；涂层的显微硬度、结合强度以及弯曲结合力则随氧燃充枪比的增加不断提高.%Detonation gun spraying method was employed to prepare CoCrAlYTa coating. The influence of oxygen/fuel in-gun ratio on structure and properties of CoCrAlYTa coating was investigated by means of SEM, EDS, micro-hardness tester and adhesive strength measuring, etc. The results reveal that the detonation combustion temperature and shock wave energy increase with the increase of oxygen/fuel in-gun ratio, which induces the transformation of the coating structure from uniform structure to lamellar structure and the decrease of the coating porosity. It was also found that the micro-hardness, adhesive and bending strength of the coating were increased with the increase of oxygen/fuel in-gun ratio.