Detail publikace

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

CHANG, Y. BERMEJO, R. ŠEVEČEK, O. MESSING, G.

Originální název

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

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

Connectivity; Composites; Residual stresses; Fracture strength; Toughness

Autoři

CHANG, Y.; BERMEJO, R.; ŠEVEČEK, O.; MESSING, G.

Rok RIV

2015

Vydáno

5. 1. 2015

Nakladatel

Elsevier

Místo

Holandsko

ISSN

0955-2219

Periodikum

Journal of the European Ceramic Society

Ročník

2015

Číslo

35

Stát

Spojené království Velké Británie a Severního Irska

Strany od

631

Strany do

640

Strany počet

10

BibTex

@article{BUT112563,
  author="Yunfei {Chang} and Raul {Bermejo} and Oldřich {Ševeček} and Gary L. {Messing}",
  title="Design of alumina-zirconia composites with spatially tailored strength and toughness",
  journal="Journal of the European Ceramic Society",
  year="2015",
  volume="2015",
  number="35",
  pages="631--640",
  doi="10.1016/j.jeurceramsoc.2014.09.017",
  issn="0955-2219"
}