Design of alumina-zirconia composites with spatially tailored strength and toughness

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F15%3APU112794" target="_blank" >RIV/00216305:26210/15:PU112794 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.jeurceramsoc.2014.09.017" target="_blank" >http://dx.doi.org/10.1016/j.jeurceramsoc.2014.09.017</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jeurceramsoc.2014.09.017" target="_blank" >10.1016/j.jeurceramsoc.2014.09.017</a>

Result language

angličtina

Original language name

Design of alumina-zirconia composites with spatially tailored strength and toughness

Original language description

Composites of Al2O3–5 vol.% t-ZrO2(ATZ) and Al2O3–30 vol.% m-ZrO2(AMZ) layers were designed with 3–1 connectivity to explore the effect of spatially-dependent residual stress and layer distribution on mechanical behavior. ATZ composites with "shallow" and "deep" regions of AMZ, defined relative to the distance from the surface, were fabricated. Four-point bending tests on indented 3–1 composites showed crack arrest in the first compressive AMZ layer and a fracture strength nearly independent of indent size (i.e. minimum strength); the failure occurring in the regionwith thicker outer ATZ layers ("deep" region). Region dependent crack growth resistance was measured on SEVNB specimens and compared to theoretical predictions using a fracture mechanics model. Spatially tailored constant strengths were obtained, ranging between 148 MPa and 470 MPa; the maximum value corresponding to a "shallow" region with a relatively thicker AMZ compressive layer embedded close to the tensile ATZ surface. The 3–1 design concept allows the fabrication of "deep" and "shallow" embedded regions within a unique composite architecture,thus providing a preferential path for crack propagation, opening new possibilities for design of composite structures with spatially-tailored crack growth resistance.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2015

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of the European Ceramic Society

ISSN

0955-2219

e-ISSN

1873-619X

Volume of the periodical

2015

Issue of the periodical within the volume

35

Country of publishing house

GB - UNITED KINGDOM

Number of pages

10

Pages from-to

631-640

UT code for WoS article

000345201700021

EID of the result in the Scopus database

2-s2.0-84908324202