| Title |
Deposition of alumina coatings from nanopowders by plasma spraying |
| Authors |
Marcinauskas, Liutauras |
| Full Text |
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| Is Part of |
Materials science = Medžiagotyra.. Kaunas : Technologija. 2010, vol. 16, no. 1, p. 47-51.. ISSN 1392-1320. eISSN 2029-7289 |
| Keywords [eng] |
Al2O3 ; Plasma spraying ; Nanopowders |
| Abstract [eng] |
Aluminum oxide coatings were prepared by the atmospheric plasma spraying from the Al2O3 nanopowders. The powders were injected into the anode zone at high temperature region. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were applied to analyze the granulated nanopowder feedstocks and coatings. The results demonstrated that the higher the plasma torch power was the lower surface roughness. The XRD results showed that δ-Al2O3 was the main phase for granules dried for 12 h at 473 K. Meanwhile the as-sprayed coatings are composed of γ-Al2O3 and α-Al2O3. The increase of the plasma torch power leads to the production of the alumina coatings with a higher amount of the γ-Al2O3 phase. The crystallite size of γ-Al2O3 (400) phase decreases from 97 nm down to 49 nm with the increase of the torch power. |
| Published |
Kaunas : Technologija |
| Type |
Journal article |
| Language |
English |
| Publication date |
2010 |
| CC license |
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