Deposition of Al2O3-TiO2 Nanostructured Powders by Atmospheric Plasma Spraying |
| |
| Authors: | E Sánchez E Bannier V Cantavella MD Salvador E Klyatskina J Morgiel J Grzonka AR Boccaccini |
| |
| Affiliation: | (1) Instituto de Tecnología Cerámica, Asociación de Investigación de las Industrias Cerámicas, Universitat Jaume I., Castellon, Spain;(2) Instituto de Tecnología de Materiales, Universidad Politécnica de Valencia, Valencia, Spain;(3) Institute of Metallurgy and Materials Science, Krakow, Poland;(4) Department of Materials, Imperial College London, London , SW7 2BP, UK |
| |
| Abstract: | Al2O3-13%TiO2 coatings were deposited on stainless steel substrates from conventional and nanostructured powders using atmospheric plasma
spraying (APS). A complete characterization of the feedstock confirmed its nanostructured nature. Coating microstructures
and phase compositions were characterized using SEM, TEM, and XRD techniques. The microstructure comprised two clearly differentiated
regions. One region, completely fused, consisted mainly of nanometer-sized grains of γ-Al2O3 with dissolved Ti+4. The other region, partly fused, retained the microstructure of the starting powder and was principally made up of submicrometer-sized
grains of α-Al2O3, as confirmed by TEM. Coating microhardness as well as tribological behavior were determined. Vickers microhardness values
of conventional coatings were in average slightly lower than the values for nanostructured coating. The wear resistance of
conventional coatings was shown to be lower than that of nanostructured coatings as a consequence of Ti segregation. A correlation
between the final properties, the coating microstructure, and the feedstock characteristics is given. |
| |
| Keywords: | Al2O3-TiO2 nanostructured coatings thermal spraying |
| 本文献已被 SpringerLink 等数据库收录！ |
|
