Structures and properties of ceramic films on TiAl intermetallic compound fabricated by microarc oxidation
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| Title: | Structures and properties of ceramic films on TiAl intermetallic compound fabricated by microarc oxidation |
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| Authors: | Li, Xijin1, Wu, Xiaoling1 wuxl@bnu.edu.cn, Xue, Wenbin1, Cheng, Guoan1, Zheng, Ruiting1, Cheng, Yunjun2 |
| Source: | Surface & Coatings Technology. Feb2007, Vol. 201 Issue 9-11, p5556-5559. 4p. |
| Subjects: | Oxidation, Intermetallic compounds, Micromechanics, Oxide minerals |
| Abstract: | Abstract: The ceramic oxide films with a thickness of 120 μm were prepared on γ-TiAl intermetallic compound by alternating-current microarc oxidation in silicate electrolyte. Isothermal oxidation of TiAl alloy coated with the ceramic oxide film was carried out in air at 1100 °C. Result showed that the dense layers in the oxide film were mainly composed of Al2TiO5 and TiO2 rutile phase, while the loose layer contained a large amount of amorphous SiO2 besides Al2TiO5 and TiO2 rutile phase. Thermal shock tests revealed a good adhesion between the films and TiAl substrate, and the oxidation resistance of the TiAl alloy was improved. [Copyright &y& Elsevier] |
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| Database: | Engineering Source |
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