Effects of grain size and specimen geometry on the transformation and R-curve behaviour of 9Ce-TZP ceramics
- 51 Downloads
Transformation and R-curve behaviour have been investigated in 9 mol% Ce-TZP ceramics with different grain sizes. Both single-edge notched beam and short double-cantilever beam specimens were tested to measure the crack-resistance curves. The size and shape of the transformation zone not only depend on grain size, but are also strongly influenced by the specimen geometry. This different transformation behaviour has led to different crack-resistance curves. These experimental results are discussed in terms of the thermodynamics of transformation, the effect of autocatalytic transformation, and fracture mechanics.
KeywordsPolymer Grain Size Fracture Mechanic Specimen Geometry Transformation Behaviour
Unable to display preview. Download preview PDF.
- 11.W. F. Brown and J. E. Srawley, in “Plane-Strain Crack Toughness Testing of High Strength Metallic Materials”, ASTM Special Technical Publication, 410 (American Society for Testing and Materials, Philadelphia, PA, 1966) p. 13.Google Scholar
- 13.S. J. Garwood, J. N. Robinson and C. E. Turner, Int. J. Fract. 11 (1975) 528.Google Scholar
- 15.“Standard Test Methods for JIc, A Measure of Fracture Toughness”, Designate, E813 817 (Associated Board of ASTM Standards, Philadelphia, PA, 1988) pp. 686–700.Google Scholar
- 26.A. G. Atkins and Y.-W. Mai, “Elastic and Plastic Fracture: Metals, Polymers, Ceramics, Composites” (Ellis Harwood, Chichester, UK, Halstend Press, NY, 1985).Google Scholar
- 27.“Standard Test Method for Plane-Strain Fracture Toughness of Metallic Materials” ASTM Designation: E 399-90E1 (American Socity for Testing and Materials, Philadelphia, PA) Annual Book of ASTM Standards, edited by P. C. Fazio et al. 3.01 (1992) pp. 518–54.Google Scholar