The synthesis of amorphous M-Si (M=transition metal) alloy powders by mechanical alloying
- 69 Downloads
Crystalline powders of Si and M (transition metal) in the composition ratio Si ∶ M = 2 ∶ 1 were mechanically alloyed by a laboratory ball mill in an inert atmosphere. The progress of the mechanical alloying was identified by X-ray diffraction. The amorphization reaction between Si and M proceeded according to a second-order reaction. The sequence of the rate of amorphization reaction for the Si-M system was Mn > Ti > V > Ni > Co. The sequence of the rate was correlated to the volume ratio (VM/VSi) of the Si-M system except for Si-Ni system. The crystallization of Si-Mn, of which the MA rate was fastest, was studied by means of X-ray diffraction, differential thermal analysis (DTA) and electrical resistivity measurement. We observed parallel changes on crystallization between the thermal event in the DTA tracing and the change of electrical resistance.
KeywordsCrystallization Electrical Resistivity Differential Thermal Analysis Thermal Event Ball Mill
Unable to display preview. Download preview PDF.
- 5.E. Hellstern and L. Schultz, in Proceedings of the LAM6 Conference, Garmisch-Partenkirchen 1986, vol. 2 (Oldenburg, München, 1987) p. 215.Google Scholar