North China University of Techonlogy

Zhichao Dong

Wei Sun

Hang Li

Lu Liu

Cong Liu

Yan Wu

Jinhe Yang

Yi Wen

Peixuan Ouyang

Shuting Zhang

A titanium aluminide (TiAl) coating capable of improving high-temperature oxidation resistance of titanium alloys and a preparation method thereof are provided. The TiAl coating includes &#x3b1;-AlFnanoparticles, and a content of the &#x3b1;-AlFnanoparticles is 5-30 vol. % of the TiAl coating. The preparation method of the TiAl coating includes: using a TiAl alloy target and an &#x3b1;-AlFtarget as raw materials, and performing magnetron sputtering on a substrate surface to prepare a coating; the magnetron sputtering is double-target co-sputtering, and a substrate temperature during the magnetron sputtering is 150&#xb0; C., the TiAl alloy target is performed direct current sputtering with a power of 0.5-2 kW, and the &#x3b1;-AlFtarget is performed radio frequency sputtering with a power of 0.07-0.2 kW. After the coating is obtained by the double-target co-sputtering, the obtained coating is heat-treated at 600-800&#xb0; C. for 5-20 h to obtain a final coating.

Titanium aluminide coating capable of improving high-temperature oxidation resistance of titanium alloy and preparation method thereof

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Beijing, China

Zhichao Dong