Journal
CURRENT APPLIED PHYSICS
Volume 11, Issue 6, Pages 1405-1409Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cap.2011.04.011
Keywords
Titanium alloy; Coating; Microstructure; Infrared emissivity
Funding
- NSFC [50701014, 50905071]
- program for New Century Excellent Talents in University of China [NCET-08-0166]
- Fundamental Research Funds for the Central Universities [HIT. NSRIF. 2010110]
- Key Laboratory of Bionic Engineering of Ministry of Education
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Ceramic coatings containing TiO2 were formed on Ti6Al2Zr1Mo1V alloy surface by microarc oxidation (MAO) method. The microstructure, phase and chemical composition of the coatings were analyzed by SEM, XRD and EDS techniques. The coating mainly consists of rutile TiO2 and a small amount of anatase TiO2. The infrared emissivity values of coated and uncoated titanium samples when exposed to 700 degrees C were tested. It was found that the coating exhibits a higher infrared emissivity value (about 0.9) in the wavelength range of 8-14 mu m than that of the uncoated titanium alloy, although which shows a slight increase from 0.1 to 0.3 with increasing exposure time at 700 degrees C. The relatively high infrared emissivity value of the MAO coating is possibly attributed to the photon emission from the as formed TiO2 phase. (C) 2011 Elsevier B.V. All rights reserved.
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