| Autor: |
Ali, Rawaid, Song, Peng, Khan, Muhammad, Ali, Shabir, Huang, Taihong, Shakeel, Hanifi, Dadallah, Lu, Jiansheng, Fazil, Perveen |
| Předmět: |
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| Zdroj: |
JOM: The Journal of The Minerals, Metals & Materials Society (TMS); Nov2023, Vol. 75 Issue 11, p4980-4992, 13p |
| Abstrakt: |
The Al2O3 forming MAX-phase Ti2AlC has potential to be used in the high-temperature combustion chambers of aircraft engines. In this work, Ti2AlC powder was compressed and synthesized by spark plasma sintering (SPS) at 1200°C and 30 MPa for different periods of time. The surface morphology, cross-section microstructure, mapping elemental distribution analysis, phase transition analysis, and mechanical properties were analyzed using a scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), and nanoindentation techniques. The results revealed that between 24 h and 100 h, Ti2AlC structure was primarily composed of rutile TiO2, with a small amount of α-Al2O3 and numerous planar defects. When the oxidation time was increased, some additional oxides such as rutile-TiO2, α-Al2O3, TiO2-Al2TiO5, and TiO2-α-Al2O3 were also formed. Although the planar defects were reduced at 300 h due to the inward diffusion of O2− and outward diffusion of Al3+ and Ti4+, they spread throughout the entire structure rather than forming layers, leading to a significant loss in oxidation resistance. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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