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- Title
Plasma Sprayed Dense MgO-YO Nanocomposite Coatings Using Sol-Gel Combustion Synthesized Powder.
- Authors
Jiwen Wang; Jordan, Eric; Gell, Maurice
- Abstract
MgO-YO nanostructured composite powder (volume ratio of 50:50) was synthesized by a sol-gel combustion process which generated crystal sizes in the 10-20 nm range. The MgO-YO nanopowder was plasma sprayed using a conventional, DC arc plasma spray system. X-ray diffraction analysis shows that the as-sprayed MgO-YO coating is composed of cubic MgO and YO phases and has ~95% density. Microstructure characterization by SEM reveals that the as-sprayed coating has fine grain sizes of 100-300 nm as a result of rapid solidification. The hardness of the coating, 7.5 ± 0.6 GPa, is higher than that of coarse-grained, dense MgO, and YO ceramics. This approach demonstrates the potential of plasma spray processes for making thick, dense MgO-YO nanocomposite performs for applications as durable, infrared windows.
- Subjects
PLASMA spraying; NANOCOMPOSITE materials; MICROSTRUCTURE; SOLIDIFICATION; HARDNESS
- Publication
Journal of Thermal Spray Technology, 2010, Vol 19, Issue 5, p873
- ISSN
1059-9630
- Publication type
Article
- DOI
10.1007/s11666-010-9496-x