R-Curve Behavior of In Situ Toughened alpha-SiAlON Ceramics
R-curves of single-phase Y- and Ca-containing α-SiAlON ceramics have been measured. They range from flat ones for fine-grain ceramics to pronounced rising ones when large elongated grains are present. The highest toughness measured reached 11.5 MPa∙m1/2 over a crack extension of about 1000 μm.
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Copyright The American Ceramic Society. Reprinted from Journal of the American Ceramic Society, Volume 84, Issue 4, April 2001, pages 884-886.