Preparation and characterization of nanocrystalline chromium boride
- 193 Downloads
Nanocrystalline chromium boride (CrB) powders were successfully synthesized at 600 °C through a solid-state reaction. The synthesis was carried out in an autoclave by using CrCl3, Mg and MgB2 as the reactants. The X-ray powder diffraction pattern indicates the formation of orthorhombic CrB. Transmission electron microscopy image shows that typical CrB crystallites are composed of floss-like particles with less than 10 nm in diameter and about 50–100 nm in length. Thermogravimetric analysis revealed that the oxidation resistance for nanocrystalline CrB is much lower than that of bulk CrB.
KeywordsBoride Oxidation Resistance CrCl3 Titanium Tetrachloride Titanium Diboride
This work was supported by the Key Project of Science and Technology Research of Education Ministry of China, the Natural Science Foundation of Heilongjiang Province, the Postdoctoral Start-up Found of Heilongjiang Province, the Skeleton Teacher Innovative Ability Project of General high-Level College of Heilongjiang Province, the Science and Research Supported Project of the Oversea Person with Ability, Education Bureau of Heilongjiang Province.
- 3.Adams RM (1964) Boron, metallo-boron compounds, and boranes. Interscience, New York, pp 335Google Scholar
- 4.Aronsson B, Lundstrom T, Rundqvist S (1965) Borides, silicides, and phosphides: a critical review of their preparation, properties and crystal chemistry. Methuen, London, p 3Google Scholar
- 5.Thomson R (1990) In: Freer R (ed) The physics and chemistry of carbides, nitrides and borides, vol 185, Kluwer Academic Pub., Boston, MA, NATO ASI Series E, p113Google Scholar
- 10.Matkovich VI (1977) Boron and refractory borides. Springe, New YorkGoogle Scholar