Fracture toughness, strength, and other characteristics of yttria-stabilized zirconium ceramics. Gogotsi, G. A., Galenko, V. I., Ozerskii, B. I., Vasil'ev, A. D., & Korban, V. I. Refractories and Industrial Ceramics, 41(7-8):257–263, August, 2000.
doi  abstract   bibtex   
The mechanical behavior of zirconium ceramics with different porosities (456 and 1330 MPa) is studied with an accent on the fracture toughness (the study of other characteristics in a wide temperature range plays an auxiliary role). The tests are predominantly performed with the use of a Vickers pyramid (the IF and IS methods) and under flexure (the SEVNB and SENB methods). The results of the indentation and subsequent bending of the specimens are used to plot a R-curve that turns out to be plane. It is shown that despite the substantial difference in the strength of the studied variants of ceramics their crack resistance differs inconsiderably. The values of the critical coefficients of stress intensity determined by various methods for the same ceramics are shown to differ. The results obtained are analyzed using the data of a micro-Raman analysis. The tests for crack resistance by the method of SEVNB (bending of a beam with a polished Y-notch) show that the specimens do not undergo a tetragonal-monoclinic phase transformation during the deposition of a stress concentrator.
@article{gogotsi_fracture_2000,
	title = {Fracture toughness, strength, and other characteristics of yttria-stabilized zirconium ceramics},
	volume = {41},
	issn = {1083-4877},
	doi = {10.1007/bf02693761},
	abstract = {The mechanical behavior of zirconium ceramics with different porosities (456 and 1330 MPa) is studied with an accent on the fracture toughness (the study of other characteristics in a wide temperature range plays an auxiliary role). The tests are predominantly performed with the use of a Vickers pyramid (the IF and IS methods) and under flexure (the SEVNB and SENB methods). The results of the indentation and subsequent bending of the specimens are used to plot a R-curve that turns out to be plane. It is shown that despite the substantial difference in the strength of the studied variants of ceramics their crack resistance differs inconsiderably. The values of the critical coefficients of stress intensity determined by various methods for the same ceramics are shown to differ. The results obtained are analyzed using the data of a micro-Raman analysis. The tests for crack resistance by the method of SEVNB (bending of a beam with a polished Y-notch) show that the specimens do not undergo a tetragonal-monoclinic phase transformation during the deposition of a stress concentrator.},
	language = {English},
	number = {7-8},
	journal = {Refractories and Industrial Ceramics},
	author = {Gogotsi, G. A. and Galenko, V. I. and Ozerskii, B. I. and Vasil'ev, A. D. and Korban, V. I.},
	month = aug,
	year = {2000},
	keywords = {Materials Science, indentation techniques},
	pages = {257--263}
}

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