Journal
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
Volume 22, Issue 5, Pages 530-536Publisher
SPRINGER
DOI: 10.1007/s12613-015-1103-1
Keywords
composite materials; SiAlON ceramics; iron molybdenum alloys; reaction bonding; mechanical properties; molten aluminum
Categories
Funding
- National Natural Science Foundation of China [51272208]
- Program for New Century Excellent Talents in University [NCET-12-0454]
- Program for Young Excellent Talents in Shaanxi Province, China [2013KJXX-50]
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An FeMo-alloy-doped beta-SiAlON (FeMo/beta-SiAlON) composite was fabricated via a reaction-bonding method using raw materials of Si, Al2O3, AlN, FeMo, and Sm2O3. The effects of FeMo on the microstructure and mechanical properties of the composite were investigated. Some properties of the composite, including its bending strength at 700A degrees C and after oxidization at 700A degrees C for 24 h in air, thermal shock resistance and corrosion resistance to molten aluminum, were also evaluated. The results show that the density, toughness, bending strength, and thermal shock resistance of the composite are obviously improved with the addition of an FeMo alloy. In addition, other properties of the composite such as its high-temperature strength and oxidized strength are also improved by the addition of FeMo alloy, and its corrosion resistance to molten aluminum is maintained. These findings indicate that the developed FeMo/beta-SiAlON composite exhibits strong potential for application to molten aluminum environments.
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