Critical radius of zirconia inclusions in transformation toughening of ceramics

R.A. Filippov, A.B. Freidin, I.V. Hussainova, E.N. Vilchevskaya

Research output

Abstract

The paper presents a transformation toughening model of ceramics taking into account an energy barrier the overcoming of which results in phase transformation of zirconia inclusions. Methods based on experimental data analysis are proposed for estimating the energy barrier. The size range of zirconia inclusions in Al2O3 and WC matrices is defined depending on the energy barrier value, working temperature, and external load. It is shown that the introduction of an energy barrier enables an adequate estimation of the size range of inclusions at which transformation toughening occurs in ceramics. The elastic interaction of inclusions is shown to cause a decrease in their critical radii with the growing volume density, which agrees with experimental data.
Original languageEnglish
Pages (from-to)33-42
JournalPhysical Mesomechanics
Volume18
Issue number1
DOIs
Publication statusPublished - 2015

Fingerprint

Toughening
Energy barriers
zirconium oxides
Zirconia
inclusions
ceramics
radii
energy
phase transformations
estimating
Phase transitions
zirconium oxide
causes
matrices
interactions
Temperature
temperature

Cite this

Filippov, R.A. ; Freidin, A.B. ; Hussainova, I.V. ; Vilchevskaya, E.N. / Critical radius of zirconia inclusions in transformation toughening of ceramics. In: Physical Mesomechanics. 2015 ; Vol. 18, No. 1. pp. 33-42.
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Critical radius of zirconia inclusions in transformation toughening of ceramics. / Filippov, R.A.; Freidin, A.B.; Hussainova, I.V.; Vilchevskaya, E.N.

In: Physical Mesomechanics, Vol. 18, No. 1, 2015, p. 33-42.

Research output

TY - JOUR

T1 - Critical radius of zirconia inclusions in transformation toughening of ceramics

AU - Filippov, R.A.

AU - Freidin, A.B.

AU - Hussainova, I.V.

AU - Vilchevskaya, E.N.

PY - 2015

Y1 - 2015

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KW - ceramics

KW - transformation toughening

KW - fracture

KW - zirconia

KW - phase transformation

KW - energy barrier

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