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研究了溅射ＴｉＡｌＣｒ 涂层对ＴｉＡｌ 金属间化合物抗硫酸盐热腐蚀性能的影响。结果表明，８５０ ℃时，９０ ％ Ｎａ２ＳＯ４ ＋ １０ ％ Ｋ２ＳＯ４ 中Ｔｉ５０Ａｌ 和Ｔｉ２４Ａｌ１４Ｎｂ３Ｖ 都遭受严重热腐蚀。ＴｉＡｌＣｒ 涂层能大大改善ＴｉＡｌ 金属间化合物的抗热腐蚀性能。带Ｔｉ５０Ａｌ１０Ｃｒ 涂层的Ｔｉ５０Ａｌ 表面形成一层完整致密的Ａｌ２Ｏ３ 膜， 涂层与基材之间无明显互扩散。带Ｔｉ５０Ａｌ１０Ｃｒ 涂层的Ｔｉ２４Ａｌ１４Ｎｂ３Ｖ 表面虽然也形成Ａｌ２Ｏ３ 膜， 但在其上面长出一些ＴｉＯ２ 瘤。这可能是涂层与基材之间的互扩散导致涂层中Ｔｉ 含量增加，Ａｌ 含量减少而生成ＴｉＯ２ 的结果。将涂层成分调整为Ｔｉ５０Ａｌ２０Ｃｒ 后， 带Ｔｉ５０Ａｌ２０Ｃｒ 涂层的Ｔｉ２４Ａｌ１４Ｎｂ３Ｖ 表面生成了连续的Ａｌ２Ｏ３ 膜， 其抗热腐蚀性能良好。
The effect of sputtered TiAlCr coating on the thermal corrosion resistance of TiAl intermetallic compounds to sulphate was studied. The results show that at 850 ℃, Ti50Al and Ti24Al14Nb3V in 90% Na2SO4 + 10% K2SO4 suffer severe hot corrosion. TiAlCr coating can greatly improve the hot corrosion resistance of TiAl intermetallics. Ti50Al10Cr with Ti50Al coating surface to form a complete dense Al2O3 film, no significant mutual diffusion between the coating and the substrate. With Ti50Al10Cr coating Ti 24Al 14Nb 3V surface although the formation of Al2O3 film, but grow in it some TiO2 tumor. This may be the result of mutual diffusion between the coating and the substrate resulting in an increase of the Ti content in the coating and a decrease of the Al content to produce TiO2. The coating composition is adjusted to Ti50Al20Cr, with Ti50Al20Cr coating Ti 24Al 14Nb 3V surface generated a continuous Al2O3 film, the good thermal corrosion resistance.