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Production of silicon carbide reinforced molybdenum disilicide composites using high-pressure sintering
- Source :
- Ceramics International. 46:23643-23650
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- Studying the mechanical and thermal properties as well as the relationship between microstructure evolution and strengthening mechanisms is crucial for obtaining superior high-temperature refractory molybdenum disilicide-silicon carbide composites. In this study, molybdenum disilicide and silicon carbide powders with different volume ratios were used to fabricate molybdenum disilicide-silicon carbide composites via high pressure and high temperature at 5.5 GPa/1773 K. The introduction of the second phase improved the materials' mechanical properties. Transmission electron microscopy demonstrated that severe plastic deformation generated numerous micro-defects and grain refinement during the high pressure sintering process. The second phase enhancement also improved the samples’ performances. Under high pressure and high temperature sintering process, the thermal and mechanical properties of the materials increased dramatically, including a well Vickers hardness (~20.6 GPa), fracture toughness (~10.3 MPa·m1/2) and thermal stability (>1673 K).
- Subjects :
- 010302 applied physics
Materials science
Process Chemistry and Technology
Molybdenum disilicide
Sintering
chemistry.chemical_element
02 engineering and technology
021001 nanoscience & nanotechnology
Microstructure
01 natural sciences
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Carbide
chemistry.chemical_compound
chemistry
Molybdenum
0103 physical sciences
Vickers hardness test
Materials Chemistry
Ceramics and Composites
Silicon carbide
Composite material
0210 nano-technology
Strengthening mechanisms of materials
Subjects
Details
- ISSN :
- 02728842
- Volume :
- 46
- Database :
- OpenAIRE
- Journal :
- Ceramics International
- Accession number :
- edsair.doi...........11314bfab0dd5bfc68660125f077e5c8