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Processing of hot pressed Al2O3–Cr2O3/Cr-carbide nanocomposite prepared by MOCVD in fluidized bed |
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| Authors: | Hao-Tung Lin Sheng-Chang Wang Jow-Lay Huang Shin-Yun Chang |
| Affiliation: | aDepartment of Materials Science and Engineering, National Cheng-Kung University, Tainan 701, Taiwan, ROC bDepartment of Mechanical Engineering, Southern Taiwan University of Technology, Tainan 710, Taiwan, ROC |
| Abstract: | Nanosized particles dispersed uniformly on Al2O3 particles were prepared from the decomposition of precursor Cr(CO)6 by metal organic chemical vapor deposition (MOCVD) in a fluidized chamber. These nanosized particles consisted of Cr2O3, CrC1?x, and C. A solid solution of Al2O3–Cr2O3 and an Al2O3–Cr2O3/Cr3C2 nanocomposite were formed when these fluidized powders were pre-sintered at 1000 and 1150 °C before hot-pressing at 1400 °C, respectively. In addition, an Al2O3–Cr2O3/Cr-carbide (Cr3C2 and Cr7C3) nanocomposite was formed when the particles were directly hot pressed at 1400 °C. The interface between Cr3C2 and Al2O3 is non-coherent, while the interface between Cr7C3 and Al2O3 is semi-coherent. |
| Keywords: | Precursors-organic Composites Interfaces Al2O3 Cr2O3 |
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