Member, American Ceramic Society.
Neutron Diffraction Study of Ferroelasticity in a 3 mol% Y2O3–ZrO2
Article first published online: 20 DEC 2004
Journal of the American Ceramic Society
Volume 84, Issue 2, pages 399–405, February 2001
How to Cite
Ma, Y., Kisi, E. H. and Kennedy, S. J. (2001), Neutron Diffraction Study of Ferroelasticity in a 3 mol% Y2O3–ZrO2. Journal of the American Ceramic Society, 84: 399–405. doi: 10.1111/j.1151-2916.2001.tb00668.x
I-W. Chen—contributing editor
This work was supported by the Australian Research Council and the Australian Institute of Nuclear Science and Engineering. Additional support was provided to Y. Ma through a University of Newcastle Postgraduate Research Scholarship.
- Issue published online: 20 DEC 2004
- Article first published online: 20 DEC 2004
- Manuscript No. 188924. Received November 24, 1999; approved September 24, 2000.
- ferroelastic materials;
In situ neutron diffraction patterns were recorded from a 3Y-TZP sample during a complete loading–unloading cycle at compressive loads up to 2.3 GPa. The macroscopic stress–strain diagram shows elastic behavior to 1.7 GPa followed by volume conserving plastic strains of ∼1.6 × 10−3. There were no signs of t→m transformation in the neutron diffraction patterns, and intensity changes in the pattern show that the plasticity is due to ferroelastic switching of tetragonal zirconia crystals. Quantification of the degree of switching gives good agreement with the macroscopic strains. The ferroelastic switching is completely reversed by a process akin to creep relaxation on unloading. Lattice parameters, elastic constants, and structural changes as a function of load are also discussed.