The investigation of the oxidation resistance and tensile behavior of aluminide coated and uncoated Ti6Al4V at room temperature and at 600 °C was carried out. Ti-Al coating was developed on Ti6Al4V by Hot-dip Aluminizing technique followed by solution treatment (900 °C/1 h), quenching in water and ageing treatment (500 °C/6 h). For a comparative analysis, the diffusion heat treatment was performed with and without oxygen plasma environment. The diffusion treatment without oxygen plasma is referred as thermal treatment while the diffusion treatment with oxygen plasma is referred as plasma treatment. The cyclic oxidation test was carried out for uncoated samples, thermally treated (THT samples) and plasma treated samples (PAHT samples) at 600 °C for 120 h. Significant improvement in the oxidation resistance was observed for coated samples. Weight gain during oxidation studies in PAHT samples is almost 100 times less than uncoated samples and 8 times less than THT samples. The tensile test conducted at room temperature and at 600 °C showed marginal reduction of Ultimate tensile strength (UTS) and Yield strength (YS) of substrate for PAHT samples and THT samples. Plasma processing yields nanocrystalline coatings which have been found to improve oxidation resistance and would help address oxidation issues in gas turbine applications.

在室温和600°C下研究了铝化物涂覆和未涂覆的Ti6Al4V的抗氧化性和拉伸性能。通过热浸镀铝技术在Ti6Al4V上开发Ti-Al涂层，然后进行固溶处理（900°C / 1 h），在水中淬火和时效处理（500°C / 6 h）。为了进行比较分析，在有氧等离子体环境和无氧等离子体环境下进行了扩散热处理。没有氧等离子体的扩散处理称为热处理，而有氧等离子体的扩散处理称为等离子体处理。在600°C下对未涂覆的样品，热处理的（THT样品）和等离子体处理的样品（PAHT样品）进行了120 h循环氧化测试。对于涂覆的样品，观察到抗氧化性的显着改善。在PAHT样品的氧化研究过程中，重量增加几乎是未涂层样品的100倍，是THT样品的8倍。在室温和600°C下进行的拉伸试验表明，PAHT样品和THT样品的极限抗拉强度（UTS）和屈服强度（YS）略有降低。等离子处理产生纳米晶涂层，发现该纳米晶涂层可提高抗氧化性，并有助于解决燃气轮机应用中的氧化问题。