In Situ Synthesis of (Mo,Cr)Si2 Composites by Spark Plasma Sintering
This research investigated the impact of Cr content on the properties of (Mo,Cr)Si<sub>2</sub> composites. Composites with CrSi<sub>2</sub> 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 (Mo<sub>95</sub>,Cr<sub>5</sub>)Si<sub>2</sub> composite sintered at 1400 °C exhibited enhanced properties, including a Vickers hardness of 11.6 GPa, a fracture toughness of 4.6 MPa·m<sup>1/2</sup>, and a flexural strength of 397 MPa. Upon oxidation at 1500 °C, the (Mo,Cr)Si<sub>2</sub> composites formed a protective oxide layer comprised of SiO<sub>2</sub> and Cr<sub>2</sub>O<sub>3</sub>. It was found that the generation and thickening of the protective oxide layer was promoted by the addition of moderate amounts of Cr to MoSi<sub>2</sub>.
Authors
- Y.L. Wang
- Guo‐Hua Zhang (ORCID: https://orcid.org/0000-0003-3359-1276)
Institutions
- University of Science and Technology Beijing (CN)
Publication Details
- Journal
- Materials
- Published
- 2024-08-19
- DOI
- https://doi.org/10.3390/ma17164105
- Citations
- 2
- Primary Topic
- Intermetallics and Advanced Alloy Properties
- Type
- article
- Field-Weighted Citation Impact
- 0.43
Funders
- University of Science and Technology Beijing
- State Key Laboratory of Advanced Metallurgy