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Fracture toughness of alumina matrix composites (AMC)

M. SZUTKOWSKA1,2, M. BONIECKI3

Affiliation

  1. The Institute of Advanced Manufacturing Technology, Cracow 30011, Poland,
  2. Pedagogical University of Cracow, Cracow 30084, Poland
  3. The Institute of Electronic Materials Technology, Warsaw 01919, Poland

Abstract

YSZ solid electrolyte with high fracture toughness as well as enhanced strength is required from a performance and structural reliability point of view. A specific characteristic in fracture toughness measurement according to various methods of advanced alumina matrix composites with particular reference to Al2O3-ZrO2 composites is a main goal of the presentation. The values of the KIC obtained by conventional method on the mechanically notched specimen type SENB (Single Edge Notched Beam) were compared with indentation fracture toughness. Indentation fracture toughness has been determined from direct measurement of the crack length, developed during the Vickers indentation test. The modified method of direct crack measurement has also been used for determination of the fracture toughness. The parameters of subcritical crack growth were determined. Chipping compliance of the alumina matrix composites under different loads applied to the Vickers hardness indenter was tested. The composites Al2O3-10 wt.% ZrO2 with unstabilised ZrO2, yttria or ceria stabilized ZrO2 were tested..

Keywords

Fracture toughness, Indentation fracture toughness, Subcritical crack growth, Ceramic matrix composites..

Submitted at: Feb. 20, 2009
Accepted at: Feb. 18, 2010

Citation

M. SZUTKOWSKA, M. BONIECKI, Fracture toughness of alumina matrix composites (AMC), Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 2, pp. 301-308 (2010)