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Particularities of Powerful Ultrasound Action on Nanostructuired Powders

Published online by Cambridge University Press:  10 February 2011

O.L. Khasanov ,
Yu.P. Pokholkov ,
V.M. Sokolov ,
E.S. Dvilis ,
Z.G. Bikbaeva  and
V.V. Polisadova
O.L. Khasanov
Affiliation:
R&D Center «Spectr», Tomsk Polytechnic University, PO Box 3878, Tomsk, 634034 Russia, [email protected]
Yu.P. Pokholkov
Affiliation:
R&D Center «Spectr», Tomsk Polytechnic University, PO Box 3878, Tomsk, 634034 Russia
V.M. Sokolov
Affiliation:
R&D Center «Spectr», Tomsk Polytechnic University, PO Box 3878, Tomsk, 634034 Russia
E.S. Dvilis
Affiliation:
R&D Center «Spectr», Tomsk Polytechnic University, PO Box 3878, Tomsk, 634034 Russia
Z.G. Bikbaeva
Affiliation:
R&D Center «Spectr», Tomsk Polytechnic University, PO Box 3878, Tomsk, 634034 Russia
V.V. Polisadova
Affiliation:
R&D Center «Spectr», Tomsk Polytechnic University, PO Box 3878, Tomsk, 634034 Russia
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Abstract

The conditions of in ultrasound (US) transmission through a nanodispersed powder (NP) and possible effects of US-action at compacting of NP ZrO2 − Y2O3 are analyzed. These effLcts include agglomerate crushing, NP particle activation under the conditions of acoustic flows; dense NP compacting with the preservation of a compact nanostructure in the absence of acoustic flows. It was shown that the result of 13S action was dcfined by the compacting pressure P and ItS intensity level I, the values of which were divided into the ranges by the critical parameters PC and IC NP transfers from the state of gas-dispersed medium to the state of a solid porous body at P = PC, and IC characterizes the threshold of acoustic flows appearance in the powder body.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 520: Symposium P – Nanostructured Powders & Their Industrial Application , 1998 , 77
Copyright
Copyright © Materials Research Society 1998

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References

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