Alternant phase distribution and wear mechanical properties of an Al 2 O 3 -40 wt%TiO 2 composite coating
| Autor: | Jiansheng Lu, H. Luo, Jianguo Lü, Jing Feng, X.P. Xiong, J.J. Zang, Asim Khan, Peng Song |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Morphology (linguistics) Distribution (number theory) Process Chemistry and Technology 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology 01 natural sciences Ceramic coating Surfaces Coatings and Films Electronic Optical and Magnetic Materials Composite coating Lamellar phase Coating Phase (matter) Phase composition 0103 physical sciences Materials Chemistry Ceramics and Composites engineering Composite material 0210 nano-technology |
| Zdroj: | Ceramics International. 43:7295-7304 |
| ISSN: | 0272-8842 |
| Popis: | Al 2 O 3 -40 wt%TiO 2 (AT40) coating is a low-cost and widely applied ceramic coating. In this article, the phase distribution, micro-hardness and wear mechanism, as well as the spraying conditions optimization, are discussed. Interface defects. Phase distribution and phase composition were analysed using SEM and XRD. The results show that the pre-existing surface morphology mainly determines the phase distribution. Al 2 TiO 5 and γ-Al 2 O 3 are the main phases in the coating. In this experiment, the highest micro-hardness (1126.2 HV 0.2 ) was measured using a Vickers tester. Additionally, the wear rate of the highest micro-hardness coating is 0.0387 mg/N m, which is the lowest weight loss rate measured among all the samples. The wear mechanism for this sample is primarily scratches. In conclusion, the compact lamellar phase distribution decreases the number of interface defects, increases the hardness and determines the wear mechanism. Also, the phase distribution is affected by the spraying conditions. |
| Databáze: | OpenAIRE |
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