| Autor: |
Kear, B., Kalman, Z., Sadangi, R., Skandan, G., Colaizzi, J., Mayo, W. |
| Zdroj: |
Journal of Thermal Spray Technology; Dec2000, Vol. 9 Issue 4, p483-487, 5p |
| Abstrakt: |
Air plasma spray has been used to produce metastable oxide-ceramic powders and coatings, starting with commercially available Al2O3/13TiO2 powder feed. The feed material undergoes rapid melting and homogenization in the high-temperature zone of the plasma jet. A metastable x-Al2O3·TiO2 phase is formed when the molten droplets are quenched on a chilled substrate. The metastable phase has a defect spinel structure and a nanocrystalline grain size. When heated, it decomposes into an equilibrium two-phase structure, consisting of α-Al2O3 and β-Al2O3·TiO2. Both types of ceramic materials have potential as hard, wear-resistant coatings. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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