Abstract
Nanocrystalline chromium disilicide was synthesized by co-reducing anhydrous chromium trichloride and sodium fluorosilicate with metallic potassium at 650 °C in an autoclave. X-ray powder diffraction pattern indicated that the product was hexagonal CrSi2. Transmission electron microscope images showed that the sample consisted of particles with the diameters of 20-50 nm and an average diameter of about 35 nm. TGA and DTA indicated that the oxidation of CrSi2 began to proceed at 700 °C in air, and only about 8.6wt.% of the sample was oxidized in the surfaces of the particles below 1000 °C. It had high thermal oxidation stability due to the formed protective layer.
Original language | English |
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Pages (from-to) | 176-179 |
Number of pages | 4 |
Journal | Journal of Alloys and Compounds |
Volume | 376 |
Issue number | 1-2 |
DOIs | |
Publication status | Published - 2004 Aug 11 |
Keywords
- Chemical synthesis
- Chromium disilicide
- Nanostructures
- Thermal property
- X-ray diffraction
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry