Effect of TiO2 and ZrO2 reinforcements on properties of Al2O3 coatings fabricated by thermal flame spraying
| Autor: | Ali Bilek, Youcef Mouadji, Rassim Younes, Abdelhamid Sadeddine, Abderrahim Benabbas, Mohand Amokrane Bradai |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Carbon steel Metals and Alloys 02 engineering and technology Tribology engineering.material 021001 nanoscience & nanotechnology Geotechnical Engineering and Engineering Geology Condensed Matter Physics Microstructure 01 natural sciences Indentation hardness Matrix (chemical analysis) Coating Phase (matter) 0103 physical sciences Materials Chemistry engineering Composite material 0210 nano-technology Thermal spraying |
| Zdroj: | Transactions of Nonferrous Metals Society of China. 26:1345-1352 |
| ISSN: | 1003-6326 |
| DOI: | 10.1016/s1003-6326(16)64237-1 |
| Popis: | The alumina composite coatings reinforced with 25% ZrO2 (denoted as AZ-25) and 3% TiO2 (denoted as AT-3) were deposited on low carbon steel using a thermal flame spraying. The microstructure, phase composition, microhardness and tribological properties of the coatings were investigated. The XRD results of the coatings reinforced by TiO2 (AT-3) revealed the presence of α-Al2O3 phase as matrix and new metastable phases of γ-Al2O3 and κ-Al2O3. However, the coatings reinforced by ZrO2 (AZ-25) consist of α-Al2O3 as matrix, q-ZrO2 and m-ZrO2. In most studied conditions, the AT-3 coating displays a better tribological performance, i.e., lower coefficient of frictions and wear rates, than the AZ-25 coating. It was also found that the microhardness of the coatings was decreased with the reinforcement of ZrO2 and increased with TiO2. |
| Databáze: | OpenAIRE |
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