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POUCHLÝ, V. MACA, K. SHEN, Z.
Original Title
Two-stage master sintering curve applied to two-step sintering of oxide ceramics
Type
journal article - other
Language
English
Original Abstract
Tetragonal (3 mol% Y2O3) and two cubic zirconia (8 mol% Y2O3) as well as alumina green bodies were used for the construction of the Master Sintering Curve (MSC) created from sets of constant-rate-of-heating (CRH) sintering experiments. The activation energies calculated according to the MSC theory were 770 kJ/mol for Al2O3, 1270 kJ/mol for t-ZrO2, 620 kJ/mol and 750 kJ/mol for c-ZrO2. These values were verified by an alternative approach based on an analysis of the densification rate in the intermediate sintering stage. The MSCs established from the Two-Step Sintering (TSS) experiments showed at high densities a significant deflection from those constructed from the CRH experiments. This deflection was explained by lower sintering activation energy in the closed porosity stage. A new two-stage MSC model was developed to reflect the change in sintering activation energy and to describe TSS. The efficiency of TSS of four materials under investigation was correlated with their activation energies during the final sintering stage.
Keywords
Zirconia; Alumina; Sintering; Master sintering curve; Activation energy
Authors
POUCHLÝ, V.; MACA, K.; SHEN, Z.
RIV year
2013
Released
1. 10. 2013
ISBN
0955-2219
Periodical
Journal of the European Ceramic Society
Year of study
33
Number
12
State
United Kingdom of Great Britain and Northern Ireland
Pages from
2275
Pages to
2283
Pages count
9
BibTex
@article{BUT98913, author="Václav {Pouchlý} and Karel {Maca} and Zhijian {Shen}", title="Two-stage master sintering curve applied to two-step sintering of oxide ceramics", journal="Journal of the European Ceramic Society", year="2013", volume="33", number="12", pages="2275--2283", issn="0955-2219" }