Research on the Si-Ti High Temperature Oxidation-Resistant Coatings for Tantalum Alloys

Pei Pei Song; Jun Le; Feng Ye; Xiao Cheng Sheng; Xiao Wei Zhang

doi:10.4028/www.scientific.net/AMR.785-786.45

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 785-786Research on the Si-Ti High Temperature...

Research on the Si-Ti High Temperature Oxidation-Resistant Coatings for Tantalum Alloys

Abstract:

Si-Ti coatings were prepared on the surface of T-222 alloy by fused slurry method at different temperatures (1425-1500°C). Microstructure and composition of the coatings were characterized and analysed through scanning electron microscopy (SEM), X-ray diffraction analysis (XRD), energy dispersive X-ray spectrometry (EDS) respectively. The coating fabricated at 1450°C exhibited excellent structure compatible with high temperature oxidation resistance. Its surface is relatively smooth with few holes and cracks and the main phase on the surface is (Ti, Ta)Si that possesses outstanding corrosion resistance. Moreover, the cross-sectional structure of the coating is smooth and compact which can effectively prevent O₂ from permeation. The isothermal oxidation behaviors in pure O₂atmosphere at 1500°C for 2h finally demonstrate that the optimum coating temperature is 1450°C.

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Periodical:

Advanced Materials Research (Volumes 785-786)

Pages:

45-51

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.785-786.45

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Online since:

September 2013

Authors:

Pei Pei Song, Jun Le, Feng Ye, Xiao Cheng Sheng, Xiao Wei Zhang

Keywords:

Coating, Composition, Fused Slurry, Microstructure, Oxidation, Si-Ti, Tantalum Alloys

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