Detail publikace

Design of damage tolerant and crack-free layered ceramics with textured microstructure

HOFER, A. WALTON, R. ŠEVEČEK, O. MESSING, G. BERMEJO, R.

Originální název

Design of damage tolerant and crack-free layered ceramics with textured microstructure

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

This work demonstrates damage tolerant behavior of ceramic laminates designed with residual stresses and free of surface edge cracks. Non-periodic architectures were designed by embedding 2 textured alumina (TA) layers between 3 equiaxed alumina-zirconia (AZ) layers. Compressive residual stresses of ∼ 250 MPa were induced in the textured layers. Indentation strength tests showed that textured compressive layers arrested the propagation of cracks. Results were compared to periodic architectures with the same volume ratio of TA and AZ materials. Crack propagation was arrested in both periodic and non-periodic designs; the minimum threshold-strength being higher in the latter. Non-periodic architectures with compressive layers as thin as ∼ 200 μm showed no evidence of surface edge cracks, yet still reached minimum threshold strength values of ∼ 300 MPa. In addition, the textured microstructure promoted crack bifurcation in the thin compressive layers and thus enhanced the damage tolerance of the material.

Klíčová slova

Layered ceramics; Edge crack; Non-periodic textured architecture; Residual stresses; Damage tolerance

Autoři

HOFER, A.; WALTON, R.; ŠEVEČEK, O.; MESSING, G.; BERMEJO, R.

Vydáno

6. 1. 2020

Nakladatel

Elsevier

Místo

Holandsko

ISSN

0955-2219

Periodikum

Journal of the European Ceramic Society

Ročník

2020

Číslo

40

Stát

Spojené království Velké Británie a Severního Irska

Strany od

427

Strany do

435

Strany počet

9

URL

https://www.sciencedirect.com/science/article/pii/S095522191930603X

BibTex

@article{BUT161136,
  author="Anna-Katherina {Hofer} and Rebecca {Walton} and Oldřich {Ševeček} and Gary L. {Messing} and Raul {Bermejo}",
  title="Design of damage tolerant and crack-free layered ceramics with textured microstructure",
  journal="Journal of the European Ceramic Society",
  year="2020",
  volume="2020",
  number="40",
  pages="427--435",
  doi="10.1016/j.jeurceramsoc.2019.09.004",
  issn="0955-2219",
  url="https://www.sciencedirect.com/science/article/pii/S095522191930603X"
}