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L. M. KULIKOV, N. B. KOENIG, L. G. AKSEL’RUD, and V. N. DAVYDOV
«Processes and Mechanisms of Oxidation in Nanocrystalline Layered Disulfides of Tungsten and Molybdenum »
PACS numbers: 61.05.cp, 71.20.Tx, 81.07.Bc, 81.07.Wx, 81.16.Pr, 81.65.Mq, 81.70.Pg
Processes and mechanisms of oxidation in the air (300–1300 K) of nanocrystalline and micron 2H-WS2, 2H-MoS2 powders are investigated. According to complex thermal DTA–ТG–DТG analysis, thermogravimetry and X-ray studies of oxidation products, it is revealed that thermal stability in the air of nanocrystalline 2H-WS2 and 2H-MoS2 powders insignificantly decreases in comparison with the similar data for micron powders (for nanocrystalline 2H-WS2 powders, 570–1000 K, and for micron powders, 600–1000 K). Mechanisms of oxidation of layered nanocrystalline 2H-WS2, 2H-MoS2 powders are caused by nanocrystalline state, the sizes of their anisotropic nanoparticles, and possible adsorption of oxygen and water.