Contact Strength and Cracking of Laminar Ceramics

Abstract: The paper deals with the determination of strength of laminar ceramics by mechanical tests in bending and contact modes. The bending and contact modes are simulated by the four-point bending test, and by single-cycle contact test using rollers or spheres, respectively. In general, the determination of strength of ceramic materials results from statistical methods which are usually represented by the Weibull analysis. The Weibull analysis comprises the determination of the characteristic strength σ0 and Weibull modulus m. The characteristic strength σ0,bend and σ0,cont as well as the Weibull moduli mbend and mcont, which are related to the four-point bending test and the single-cycle contact test using rollers, are thus determined, respectively. The comparison of numerical results of σ0,bend/σ0,cont, mbend/mcont confirms the validity of the Fett's theory. Along with this verification, a microstructural analysis of strength-degrading defects which represent fraction origins is performed for both modes. The determination of the mechanical loading which causes material failure along with an analysis of parameters of cracks are also presented. The contact test using the spheres is also performed at a multi-cycle mode. The mechanical tests were applied to Al2O3-ZTA laminar ceramics (ZTA=60%Al2O3 + 40%ZrO2).

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch

References and Relationships

• Bibliographic citation: Contact Strength and Cracking of Laminar Ceramics ; volume:31 ; number:2 ; year:2012 ; pages:173-179 ; High temperature materials and processes ; 31, Heft 2 (2012), 173-179

Contributors, Places and Time

• Creator: Hegedűsov’a, Lucia ; Ceniga, Ladislav

Further information

• DOI: 10.1515/htmp-2012-0013
• URN: urn:nbn:de:101:1-2501270422274.096220815162
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 15.08.2025, 7:34 AM CEST