Ball milling-induced reduction of MoS2 with Al
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The ball milling-induced reduction of MoS2 by Al has been investigated. Although this is a highly exothermic reaction that, based on its thermodynamic properties, should progress as a self-sustaining process, ignition could not be achieved by ball milling. In order to identify the reason, XRD, particle size distribution, SEM, and DTA measurements were carried out on a series of samples milled for different durations. It was found that the largest composite agglomerates broke up due to the presence of a fine dispersion of MoS2 particles. SEM also revealed that the grains are packed rather loosely within the agglomerates. These results indicate that a self-sustaining process can take place only if large and well-compacted composite particles are present.
KeywordsMilling MoS2 Displacement Reaction Al2S3 MoS2 Particle
One of the authors (A.R.T.) is expressing his thanks to the Council for International Exchange of Scholars for a Fulbright Scholarship that made this investigation possible. This work was supported in part by DRIF funds from the University of Maryland, Baltimore County. The help of Dr. Robert C. Reno with the SEM investigations and the ball milling experiments carried out by Youssef A. Mahmoud are greatly appreciated.
- 1.Heinicke G (1984) Tribochemistry. Hanser Publishers, MünchenGoogle Scholar
- 2.Avvakumov EG (1986) Mechanical Methods of the Activation of Chemical Processes. Nauka Publishing House, NovosibirskGoogle Scholar
- 4.McCormick PG (1992) Metall Trans A 23A:1285Google Scholar
- 13.Torosyan AR, Martirossyan VG, Karakhanyan SS (1998) Int J Self-Propag High-Temp Synth 7:87Google Scholar
- 15.Kubaschewski O, Alcock CB, Spencer PJ (1993) Materials Thermochemistry, 6th ed. Pergamon Press, OxfordGoogle Scholar
- 16.Klug HP, Alexander LA (1977) X-Ray Diffraction Procedures for Polycrystalline and Amorphous Materials, 2nd Ed. John Wiley and Sons, New York, p 665Google Scholar