Indentation studies on Y[sub 2]O[sub 3]-stabilized ZrO[sub 2]; 2: Toughness determination from stable growth of indentation-induced cracks

Journal Article · Sun May 01 00:00:00 EDT 1994 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1994.tb05392.x· OSTI ID:7303142

Dransmann, G W; Steinbrech, R W ^[1]; Pajares, A; Guiberteau, F ^[2]; Dominguez-Rodriguez, A ^[3]; Heuer, A H ^[4]

---

1. Inst. fuer Reaktorwerkstoffe, Juelich (Germany)
2. Univ. de Extremadura, Badajoz (Spain). Facultad de Ciencias
3. Univ. de Sevilla (Spain). Dept. de Fisic Materia Condensada
4. Case Western Reserve Univ., Cleveland, OH (United States). Dept. of Materials Science and Engineering

Stable indentation cracks were grown in four-point bend tests to study the fracture toughness of two Y[sub 2]O[sub 3]-stabilized ZrO[sub 2] ceramics containing 3 and 4 mol% Y[sub 2]O[sub 3]. By combining microscopic in situ stable crack growth observations at discrete stresses with crack profile measurements, the dependence of toughness on crack extension was determined from crack extension plots, which graphically separate the crack driving residual stress intensity and applied stress intensity factors. Both materials exhibit steeply rising R-curves, with a plateau toughness of 4.5 and 3.1 MPa[center dot]m[sup 1/2] for the 3- and 4-mol% materials, respectively. The magnitude of the plateau toughness reflects the fraction of tetragonal grain contributing to transformation toughening.

• OSTI ID: 7303142
• Journal Information: Journal of the American Ceramic Society; (United States), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 77:5; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
CHALCOGENIDES
CRACK PROPAGATION
DATA
EXPERIMENTAL DATA
FRACTURE PROPERTIES
INFORMATION
MATERIALS TESTING
MECHANICAL PROPERTIES
MECHANICAL TESTS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
RESIDUAL STRESSES
STRESSES
TESTING
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES