Transformations during Grinding of Ceria-Stabilized Tetragonal Zirconia Polycrystals |
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| Authors: | V. E. Annamalai T. Sornakumar C. V. Gokularathnam R. Krishnamurthy |
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| Affiliation: | Department of Metallurgical Engineering and Department of Mechanical Engineering, Indian Institute of Technology, Madras 600 036, India |
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| Abstract: | Ce-TZP is reported to exhibit cyclic transformation during machine grinding. Previous conclusions were based on the results obtained by grinding Ce-TZP at a single speed and depth of cut. In the present work, grinding parameters were carefully chosen to induce varied stresses. Results show that Ce-TZP exhibits cyclic transformation, not always, but only under certain favorable grinding conditions. Results are supported by XRD, optical microscopy, and dynamometric observations. Three stages of transformation, namely, a mechanical-stress-induced t to m , a frictional-heat-driven m to t , and a thermal-quenching-stress-induced t to m , in sequence, are clearly identified. |
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