Nanostructured Al{sub 2}O{sub 3}-TiO{sub 2} coatings for high-temperature protection of titanium alloy during ablation
- Laboratory of Nano Surface Engineering, Department of Materials Science, Harbin Institute of Technology, Harbin 150001 (China)
Plasma-sprayed nanostructured Al{sub 2}O{sub 3}-13 wt.%TiO{sub 2} coatings were successfully fabricated on titanium alloys (Ti-6Al-4V) using as-prepared feedstock. Ablation experiments for the titanium alloy samples with or without a coating were carried out using a Metco 9MB plasma gun. The microstructure, phase constituents and mechanical properties of the titanium alloys before and after ablation were investigated by scanning electron microscope (SEM), X-ray diffractometer (XRD) and Vickers hardness tester. The surface morphologies, cross-sectional microstructure and hardness of titanium alloys with coatings are similar before and after ablation. In contrast, the microstructure and mechanical properties of the titanium alloy without coating are significantly changed after ablation. The surface coating is found to serve as a protective coating during ablation.
- OSTI ID:
- 22066266
- Journal Information:
- Materials Characterization, Vol. 61, Issue 8; Other Information: Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1044-5803
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
77 NANOSCIENCE AND NANOTECHNOLOGY
ABLATION
ALUMINIUM ALLOYS
ALUMINIUM OXIDES
COATINGS
HARDNESS
MICROSTRUCTURE
MORPHOLOGY
NANOSTRUCTURES
SCANNING ELECTRON MICROSCOPY
SURFACE COATING
SURFACES
TEMPERATURE DEPENDENCE
TITANIUM ALLOYS
TITANIUM OXIDES
VANADIUM ALLOYS
VICKERS HARDNESS
X-RAY DIFFRACTION