期刊
CARBON
卷 42, 期 10, 页码 2067-2071出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2004.04.016
关键词
carbon composites; annealing; transmission electron microscopy; particle size
The investigation of morphological and structural changes during high-energy ball milling and thermal annealing of mixtures of amorphous carbon and molybdenum demonstrated that the activation leads to the formation of a nano-size carbide Mo2C phase. Morphological characteristics of the annealed, mechanically activated amorphous carbon-molybdenum samples depend on the time of preliminary mechanical activation. Annealing of amorphous carbon-molybdenum samples after preliminary mechanical activation, at a temperature of 860 degreesC, caused the formation of nano-sized encapsulated particles of molybdenum carbide Mo2C. The surface of the Mo2C nanoparticles was coated with a shell composed of hexagonal polyaromatic carbon 5-20 nm thick. The size of the encapsulated particles varies within a rather broad range from 10 to 20 nm to several hundred nanometers. (C) 2004 Elsevier Ltd. All rights reserved.
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