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- Title
In Situ Synthesis of (Mo,Cr)Si 2 Composites by Spark Plasma Sintering.
- Authors
Wang, Yue-Yao; Zhang, Guo-Hua
- Abstract
This research investigated the impact of Cr content on the properties of (Mo,Cr)Si2 composites. Composites with CrSi2 molar fractions ranging from 0% to 10% were fabricated using spark plasma sintering (SPS). The study undertook a systematic analysis of the surface morphology, phase composition, mechanical properties, and high-temperature oxidation resistance of the sintered samples across different compositions. Notably, the (Mo95,Cr5)Si2 composite sintered at 1400 °C exhibited enhanced properties, including a Vickers hardness of 11.6 GPa, a fracture toughness of 4.6 MPa·m1/2, and a flexural strength of 397 MPa. Upon oxidation at 1500 °C, the (Mo,Cr)Si2 composites formed a protective oxide layer comprised of SiO2 and Cr2O3. It was found that the generation and thickening of the protective oxide layer was promoted by the addition of moderate amounts of Cr to MoSi2.
- Subjects
MOLYBDENUM disilicide; VICKERS hardness; FLEXURAL strength; FRACTURE toughness; MOLE fraction
- Publication
Materials (1996-1944), 2024, Vol 17, Issue 16, p4105
- ISSN
1996-1944
- Publication type
Article
- DOI
10.3390/ma17164105