1. NaF-assisted combustion synthesis of MoSi2 nanoparticles and their densification behavior.
- Author
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Nersisyan, Hayk H., Lee, Tae Hyuk, Ri, Vladislav, Lee, Jong Hyeon, Suh, Hoyoung, Kim, Jin-Gyu, Son, Hyeon Taek, and Kim, Yong-Ho
- Subjects
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SELF-propagating high-temperature synthesis , *NANOPARTICLES , *SOIL densification , *LEACHING , *NANOCRYSTALS - Abstract
The exothermic reduction of oxides mixture (MoO 3 +2SiO 2 ) by magnesium in NaF melt enables the synthesis of nanocrystalline MoSi 2 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 MoSi 2 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. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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