ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Nanostructured surface layer was produced on the Ti-6Al-4V alloy by surface mechanicalattrition treatment (SMAT) technique, and then the ceramic composite coatings of surface nanocrystallization/micro-arc oxidation (SNC/MAO) were prepared on the nanocrystallized surface ofTi-6Al-4V alloy by pulsed single-polar micro-arc oxidation in NaAlO2 solution. The phase composition,morphology of surface and section and element content of the nanostructured surface layer and theceramic coatings were investigated by XRD, TEM, SEM and EDS, respectively. The results showed thatafter the SMAT technique treatment for a short period of time, the surface layer was refined into ultrafinegrains. The thickness of the coatings on the substrate treated by SMAT technique is about 10μm bymicro-arc oxidation, which is thicker than the ones on the substrate untreated by SMAT technique, andthe ceramic coatings are mainly composed of Al2TiO5. Besides, a bright interface layer comes outbetween the substrate and the coating when the substrate treated by SMAT technique. The influences ofthe SMAT technique on the surface morphology of the ceramic coatings also changed. The coatings usingthe SMAT technique were more compact and less porous than the ones on the substrate untreated bySMAT technique. The content of elements in the nanostructured surface layer on Ti-6Al-4V alloy hadchanged after the SMAT technique: the content of Ti increased, the content of V decreased, and thecontent of Al changed a little. The contents of Al and P in the coating increased while the content of Tidecreased
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.368-372.1322.pdf
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