Fracture toughness and crack deflection in porous multilayered ceramics: Application to NiO-YSZ

N. Joulaee, A. Makradi, Said Ahzi, M. A. Khaleel

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

The arrangement of ceramic layers in laminated structures is an interesting way to enhance the flaw tolerance of brittle ceramic materials. The interfaces are expected to deflect cracks, increasing the fracture energy of the laminate compared to a monolithic material and thus raising the toughness. The target of this study is to predict the volume fraction of pores, in porous layers, required to cause crack deflection. Formulation of the fracture toughness and fracture energy as function of the material porosity is presented for random and ordered pores distribution. The effect of crack tip-flaws interaction is considered to estimate the pores volume fraction needed for crack deflection. In this work, dense and porous layers of NiO-YSZ material similar to the one used in the fuel cells technology are considered. The fracture energy of a porous material with an ordered distribution of pores shows a possibility of crack deflection at a porosity of 22.5%. However for a system with randomly distributed pores this possibility can be seen at 36% of porosity.

Original languageEnglish
Title of host publicationMaterials Science Forum
Pages69-74
Number of pages6
Volume553
DOIs
Publication statusPublished - 1 Dec 2007
Externally publishedYes
Event2nd International Conference on Diffusion in Solids and Liquids, DSL-2006 - Aveiro, Portugal
Duration: 26 Jul 200628 Jul 2006

Publication series

NameMaterials Science Forum
Volume553
ISSN (Print)02555476

Other

Other2nd International Conference on Diffusion in Solids and Liquids, DSL-2006
CountryPortugal
CityAveiro
Period26/7/0628/7/06

Fingerprint

Fracture energy
Fracture toughness
Cracks
Porosity
Volume fraction
Defects
Ceramic materials
Crack tips
Toughness
Laminates
Porous materials
Fuel cells

Keywords

  • Crack deflection
  • Fracture energy
  • Fracture toughness
  • NiO-YSZ
  • Porosity

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Joulaee, N., Makradi, A., Ahzi, S., & Khaleel, M. A. (2007). Fracture toughness and crack deflection in porous multilayered ceramics: Application to NiO-YSZ. In Materials Science Forum (Vol. 553, pp. 69-74). (Materials Science Forum; Vol. 553). https://doi.org/10.4028/0-87849-438-3.69

Fracture toughness and crack deflection in porous multilayered ceramics : Application to NiO-YSZ. / Joulaee, N.; Makradi, A.; Ahzi, Said; Khaleel, M. A.

Materials Science Forum. Vol. 553 2007. p. 69-74 (Materials Science Forum; Vol. 553).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Joulaee, N, Makradi, A, Ahzi, S & Khaleel, MA 2007, Fracture toughness and crack deflection in porous multilayered ceramics: Application to NiO-YSZ. in Materials Science Forum. vol. 553, Materials Science Forum, vol. 553, pp. 69-74, 2nd International Conference on Diffusion in Solids and Liquids, DSL-2006, Aveiro, Portugal, 26/7/06. https://doi.org/10.4028/0-87849-438-3.69
Joulaee N, Makradi A, Ahzi S, Khaleel MA. Fracture toughness and crack deflection in porous multilayered ceramics: Application to NiO-YSZ. In Materials Science Forum. Vol. 553. 2007. p. 69-74. (Materials Science Forum). https://doi.org/10.4028/0-87849-438-3.69
Joulaee, N. ; Makradi, A. ; Ahzi, Said ; Khaleel, M. A. / Fracture toughness and crack deflection in porous multilayered ceramics : Application to NiO-YSZ. Materials Science Forum. Vol. 553 2007. pp. 69-74 (Materials Science Forum).
@inproceedings{b97e94fc372d4b4bbe0e099916a6dfdb,
title = "Fracture toughness and crack deflection in porous multilayered ceramics: Application to NiO-YSZ",
abstract = "The arrangement of ceramic layers in laminated structures is an interesting way to enhance the flaw tolerance of brittle ceramic materials. The interfaces are expected to deflect cracks, increasing the fracture energy of the laminate compared to a monolithic material and thus raising the toughness. The target of this study is to predict the volume fraction of pores, in porous layers, required to cause crack deflection. Formulation of the fracture toughness and fracture energy as function of the material porosity is presented for random and ordered pores distribution. The effect of crack tip-flaws interaction is considered to estimate the pores volume fraction needed for crack deflection. In this work, dense and porous layers of NiO-YSZ material similar to the one used in the fuel cells technology are considered. The fracture energy of a porous material with an ordered distribution of pores shows a possibility of crack deflection at a porosity of 22.5{\%}. However for a system with randomly distributed pores this possibility can be seen at 36{\%} of porosity.",
keywords = "Crack deflection, Fracture energy, Fracture toughness, NiO-YSZ, Porosity",
author = "N. Joulaee and A. Makradi and Said Ahzi and Khaleel, {M. A.}",
year = "2007",
month = "12",
day = "1",
doi = "10.4028/0-87849-438-3.69",
language = "English",
isbn = "0878494383",
volume = "553",
series = "Materials Science Forum",
pages = "69--74",
booktitle = "Materials Science Forum",

}

TY - GEN

T1 - Fracture toughness and crack deflection in porous multilayered ceramics

T2 - Application to NiO-YSZ

AU - Joulaee, N.

AU - Makradi, A.

AU - Ahzi, Said

AU - Khaleel, M. A.

PY - 2007/12/1

Y1 - 2007/12/1

N2 - The arrangement of ceramic layers in laminated structures is an interesting way to enhance the flaw tolerance of brittle ceramic materials. The interfaces are expected to deflect cracks, increasing the fracture energy of the laminate compared to a monolithic material and thus raising the toughness. The target of this study is to predict the volume fraction of pores, in porous layers, required to cause crack deflection. Formulation of the fracture toughness and fracture energy as function of the material porosity is presented for random and ordered pores distribution. The effect of crack tip-flaws interaction is considered to estimate the pores volume fraction needed for crack deflection. In this work, dense and porous layers of NiO-YSZ material similar to the one used in the fuel cells technology are considered. The fracture energy of a porous material with an ordered distribution of pores shows a possibility of crack deflection at a porosity of 22.5%. However for a system with randomly distributed pores this possibility can be seen at 36% of porosity.

AB - The arrangement of ceramic layers in laminated structures is an interesting way to enhance the flaw tolerance of brittle ceramic materials. The interfaces are expected to deflect cracks, increasing the fracture energy of the laminate compared to a monolithic material and thus raising the toughness. The target of this study is to predict the volume fraction of pores, in porous layers, required to cause crack deflection. Formulation of the fracture toughness and fracture energy as function of the material porosity is presented for random and ordered pores distribution. The effect of crack tip-flaws interaction is considered to estimate the pores volume fraction needed for crack deflection. In this work, dense and porous layers of NiO-YSZ material similar to the one used in the fuel cells technology are considered. The fracture energy of a porous material with an ordered distribution of pores shows a possibility of crack deflection at a porosity of 22.5%. However for a system with randomly distributed pores this possibility can be seen at 36% of porosity.

KW - Crack deflection

KW - Fracture energy

KW - Fracture toughness

KW - NiO-YSZ

KW - Porosity

UR - http://www.scopus.com/inward/record.url?scp=38349142549&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=38349142549&partnerID=8YFLogxK

U2 - 10.4028/0-87849-438-3.69

DO - 10.4028/0-87849-438-3.69

M3 - Conference contribution

AN - SCOPUS:38349142549

SN - 0878494383

SN - 9780878494385

VL - 553

T3 - Materials Science Forum

SP - 69

EP - 74

BT - Materials Science Forum

ER -