التفاصيل البيبلوغرافية
| العنوان: |
Microstructure and properties evolution of plasma sprayed Al2O3-Y2O3composite coatings during high temperature and thermal shock treatment |
| المؤلفون: |
Wang, Xingyu, Wang, Xiaolong, Sun, Xiaowen, Yang, Yong, Zhang, Chen, Ma, Yuduo, Cui, Yuhang, Dong, Yanchun, Yan, Dianran, Wang, You |
| المصدر: |
Journal of Rare Earths; June 2021, Vol. 39 Issue: 6 p718-727, 10p |
| مستخلص: |
Al2O3-Y2O3composite powder with TiO2additive was plasma sprayed to prepare Al2O3-Y2O3composite coatings. The microstructure and properties evolution of the Al2O3-Y2O3coatings during high temperature and thermal shock resistance were investigated. The results show that the microstructure of the Al2O3-Y2O3–TiO2coating is more uniform than that of the Al2O3-Y2O3coating. Meanwhile, amorphous phase is formed in the two coatings. The Al2O3-Y2O3(–TiO2) coatings were heat treated for 2 h at temperatures of 800, 1000 and 1200 °C, respectively. It is found that the microstructure and properties of the two coatings have no obvious change at 800 °C. Some of the amorphous phase is crystallized at 1000 °C, and meanwhile Y2O3and Al2O3react to form YAG phase and YAM phase. At 1200 °C, all of the amorphous phases are crystallized. After heat treatment, the microhardness of the two coatings is increased. The thermal shock resistance of the Al2O3-Y2O3system coatings can be improved by using TC4 titanium alloy as substrate and with NiCrAlY bonding layer. Moreover, the Al2O3-Y2O3-TiO2coating exhibits better thermal shock resistance due to the addition of TiO2. |
| قاعدة البيانات: |
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