Strength, fracture toughness, and acoustic emission of ceramics based on partially stabilized zirconium dioxide
Scientific-Technical Section
Abstract
A study is made of the mechanical behavior of ceramics based on ZrO2: a ceramic partially stabilized with MgO and a tetragonal polycrystalline ceramic with an addition of Y2O3. It is shown that the Y2O3-stabilized ceramic is linearly elastic, is characterized by a plane R-curve, and exhibits the fracture barrier effect. The ceramic with MgO is inelastic, has an increasing R-curve, and does not exhibit the fracture barrier effect. Data is obtained on acoustic emission in a study of the ceramics, the sources of the emissions being both microscopic and macroscopic defects.
Keywords
Dioxide Zirconium Fracture Toughness Mechanical Behavior Acoustic Emission
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Literature cited
- 1.M. V. Swain, “Limitation of maximum strength of zirconia-toughened ceramics by transformation toughening increment,” J. Am. Ceram. Soc.,68, No. 4, 97–99 (1985).Google Scholar
- 2.K. Tsukuma, “Mechanical properties and thermal stability of CeO2 containing tetragonal zirconia polycrystal,” Am. Ceram. Soc. Bull.,65, No. 10, 1386–1389 (1986).Google Scholar
- 3.A. G. Gashchenko, G. A. Gogotsi, A. G. Karaulov, and I. N. Rudak, “Study of the fracture toughness and mechanical characteristics of materials based on zirconium dioxide,” Probl. Prochn., No. 6, 76–80 (1974).Google Scholar
- 4.R. Carvie, R. H. J. Hannik, and R. T. Pasco, “Ceramic steel,” Nature, No. 258, 703–704 (1975).Google Scholar
- 5.G. A. Gogotsi, “The problem of certifying the strength indices of an engineering ceramic,” Vestn. Mashinostr., No. 8, 27–33 (1989).Google Scholar
- 6.G. A. Gogotsi, “Mechanical behavior of a ceramic which does not conform to Hooke's law,” Poroshk. Metall., No. 11, 79–85 (1988).Google Scholar
- 7.M. V. Swain, “Inelastic deformation of Mg-PSZ and its significance for strength-toughness relationship of zirconia toughened ceramics,” Acta Metall.,33, No. 11, 2083–2091 (1985).Google Scholar
- 8.R. Carvie, “Structural application of ZrO2-bearing materials: Advance in ceramics,” Am. Ceram. Soc., 465–479 (1983).Google Scholar
- 9.G. A. Gogotsi, V. P. Zavada, A. I. Fesenko, and V. I. Galenko, “Fracture toughness of a ceramic based on zirconia,” Submitted to VINITI 25.04.89, No. 2690-B89 (1989).Google Scholar
- 10.G. A. Gogotsi, Yu. I. Komolikov, D. Yu. Ostrovoi, et al., “Strength and fracture toughness of a ceramic based on zirconia,” Probl. Prochn., No. 1, 50–53 (1988).Google Scholar
- 11.T. Kobayashi, K. Matunuma, H. Ikawa, and K. Motoyoshi, “Measurement of fracture toughness and effect of loading rate on its value in PSZ and Si3N4 ceramics,” J. Jpn. Inst. Met.,51, No. 8, 723–729 (1987).Google Scholar
- 12.D. B. Marshall and M. V. Swain, “Crack resistance curves in magnesia-partially stabilized zirconia,” J. Am. Ceram. Soc.,71, No. 6, 399–407 (1988).Google Scholar
- 13.S. J. Burns and M. V. Swain, “Fracture toughness of MgO partial-stabilized ZrO2 specimens with KR-curve behavior from transformation toughening,” ibid., No. 3,69, 226–230 (1986).Google Scholar
- 14.A. Michelmore, S. Ryan, and R. Vallee, “MgO PSZ (a versatile high tech ceramic). Property values: Potential applications,” SAE Tech. Pap., No. 860733 (1986).Google Scholar
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© Plenum Publishing Corporation 1991