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NaF-assisted combustion synthesis of MoSi 2 nanoparticles and their densification behavior
- Source :
- Journal of Physics and Chemistry of Solids. 102:34-41
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- The exothermic reduction of oxides mixture (MoO3+2SiO2) by magnesium in NaF melt enables the synthesis of nanocrystalline MoSi2 powders in near-quantitative yields. The combustion wave with temperature of about 1000–1200 °C was recorded in highly diluted by NaF starting mixtures. The by-products of combustion reaction (NaF and MgO) were subsequently removed by leaching with acid and washing with water. The as-prepared MoSi2 nanopowder composed of spherical and dendritic shape particles was consolidated using the spark plasma sintering method at 1200–1500 °C and 50 MPa for 10 min. The result was dense compacts (98.6% theoretical density) possessing submicron grains and exhibiting hardness of 8.74–12.92 GPa.
- Subjects :
- Exothermic reaction
Materials science
Magnesium
Metallurgy
Molybdenum disilicide
Nanoparticle
chemistry.chemical_element
Spark plasma sintering
02 engineering and technology
General Chemistry
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
Combustion
01 natural sciences
Nanocrystalline material
0104 chemical sciences
chemistry.chemical_compound
Chemical engineering
chemistry
General Materials Science
Leaching (metallurgy)
0210 nano-technology
Subjects
Details
- ISSN :
- 00223697
- Volume :
- 102
- Database :
- OpenAIRE
- Journal :
- Journal of Physics and Chemistry of Solids
- Accession number :
- edsair.doi...........77a88c8ff80db9e5dd708e5e4245e920