کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1635629 | 1516945 | 2016 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Effect of TiO2 and ZrO2 reinforcements on properties of Al2O3 coatings fabricated by thermal flame spraying Effect of TiO2 and ZrO2 reinforcements on properties of Al2O3 coatings fabricated by thermal flame spraying](/preview/png/1635629.png)
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.
Journal: Transactions of Nonferrous Metals Society of China - Volume 26, Issue 5, May 2016, Pages 1345–1352