Investigations of mechanically alloyed nanocrystalline materials by microacoustic techniques

P. Dubief; J. J. Hunsinger; E. Gaffet

doi:10.1117/12.250733

18 September 1996 Investigations of mechanically alloyed nanocrystalline materials by microacoustic techniques

P. Dubief, J. J. Hunsinger, E. Gaffet

Proceedings Volume 2782, Optical Inspection and Micromeasurements; (1996) https://doi.org/10.1117/12.250733
Event: Lasers, Optics, and Vision for Productivity in Manufacturing I, 1996, Besancon, France

Abstract

The purpose of this work is to determine whether yes or no, there is a difference between the physico-chemical properties of the nanocrystalline and the microcrystalline materials. This paper deals with the acoustical behavior of nanocrystalline materials which were prepared by ball- milling and mechanical alloying. Based on two specific techniques (acoustic microinterferometry and acoustic microechography), some of the mechanical properties (elastic ones) may be determined, related to a materials volume of about a few micrometers ³ (for the high frequency 600 MHz apparatus). Thus the mechanically alloyed powders (typically 200 micrometers in diameter), behave as massive materials in this range of frequency. The measurements are directly obtained on the grains and do not take into account the voids induced by further sinthering process. The result of such a micromechanical approach will be given for pure ball-milled elements (Fe) and for the supersaturated solid phase Fe(Si) obtained by mechanical alloying.

Citation Download Citation

P. Dubief, J. J. Hunsinger, and E. Gaffet "Investigations of mechanically alloyed nanocrystalline materials by microacoustic techniques", Proc. SPIE 2782, Optical Inspection and Micromeasurements, (18 September 1996); https://doi.org/10.1117/12.250733

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