Paper Title:
R-Curve Behaviour of Alumina Matrix Ceramics with Long Cracks
  Abstract

The R-curve (KR versus crack length c) behavior has been examined in alumina-10 wt% zirconia ceramics with 3 mol% yttria stabilized zirconia, alumina-10 wt% zirconia ceramics with 12 mol% nano ceria stabilized zirconia and Al2O3-30 wt% Ti(C,N) ceramics. An observation of in situ microscopic long-through thickness crack growth during three point bending (3PB) of a single edge notched beam (SENB) enabled measurement of the R-curve. It was found that both aluminazirconia ceramics with yttria or ceria stabilized zirconia exhibit a rising R-curve while for Al2O3-30 wt% Ti(C,N) ceramics such relationship was not observed. Moreover the slow crack growth parameters (n, logA) were determined by means of load-relaxation technique for tested alumina matrix ceramics.

  Info
Periodical
Edited by
P. VINCENZINI
Pages
1652-1657
DOI
10.4028/www.scientific.net/AST.45.1652
Citation
M. Szutkowska, M. Boniecki, M. M. Bućko, "R-Curve Behaviour of Alumina Matrix Ceramics with Long Cracks ", Advances in Science and Technology, Vol. 45, pp. 1652-1657, 2006
Online since
October 2006
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