Detail publikačního výsledku

Two-stage master sintering curve applied to two-step sintering of oxide ceramics

POUCHLÝ, V.; MACA, K.; SHEN, Z.

Originální název

Two-stage master sintering curve applied to two-step sintering of oxide ceramics

Anglický název

Two-stage master sintering curve applied to two-step sintering of oxide ceramics

Druh

Článek recenzovaný mimo WoS a Scopus

Originální abstrakt

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.

Anglický abstrakt

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.

Klíčová slova

Zirconia; Alumina; Sintering; Master sintering curve; Activation energy

Klíčová slova v angličtině

Zirconia; Alumina; Sintering; Master sintering curve; Activation energy

Autoři

POUCHLÝ, V.; MACA, K.; SHEN, Z.

Rok RIV

2014

Vydáno

01.10.2013

ISSN

0955-2219

Periodikum

Journal of the European Ceramic Society

Svazek

33

Číslo

12

Stát

Spojené království Velké Británie a Severního Irska

Strany od

2275

Strany do

2283

Strany počet

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"
}