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Titolo:
Viscosity of WC-Co compacts during sintering
Autore:
Gillia, O; Josserond, C; Bouvard, D;
Indirizzi:
Inst Natl Polytech Grenoble, Lab Genie Phys & Mecan Mat, F-38402 St MartinDheres, France Inst Natl Polytech Grenoble St Martin Dheres France F-38402 eres, France
Titolo Testata:
ACTA MATERIALIA
fascicolo: 8, volume: 49, anno: 2001,
pagine: 1413 - 1420
SICI:
1359-6454(20010508)49:8<1413:VOWCDS>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
GLASS POWDER COMPACTS; CONSTITUTIVE MODEL; DENSIFICATION; CREEP; SHEAR; TEMPERATURE; SIMULATION; SHRINKAGE; GRADIENT; STRESS;
Keywords:
sintering; cemented carbides; constitutive equations;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
44
Recensione:
Indirizzi per estratti:
Indirizzo: Bouvard, D Inst Natl Polytech Grenoble, Lab Genie Phys & Mecan Mat, UMR CNRS 5010,BP 46, F-38402 St Martin Dheres, France Inst Natl Polytech GrenobleUMR CNRS 5010,BP 46 St Martin Dheres France F-38402
Citazione:
O. Gillia et al., "Viscosity of WC-Co compacts during sintering", ACT MATER, 49(8), 2001, pp. 1413-1420

Abstract

This paper describes experiments performed on WC-Co compacts in order to measure the viscosities of a Newtonian constitutive law commonly used to simulate sintering. An intermittent loading method is used during two series of experiments. The first series are dedicated to determining the axial viscosity and takes place in a loading-dilatometer. The second one takes advantage of a video-extensometry device and provides results about the viscous Poisson's ratio. The axial viscosity is obtained as a function of relative density and temperature. Viscosity shows strong exponential increase with increasing density during isothermal conditions but decreases from 10 to 1 GPa .s between 1100 degreesC and 1325 degreesC during a conventional sintering cycle. Viscous Poisson's ratio shows low values at low densities and increases to 0.5 at full density. (C) 2001 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.

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Documento generato il 27/09/20 alle ore 12:03:50