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Title: Tensile behavior of tetragonal zirconia micro/nano-fibers and beams in situ tested by push-to-pull devices
Authors: Zeng, Xiao Mei
Ye, Pengcheng
Tan, Hui Teng
Du, Zehui
Gan, Chee Lip
Keywords: Engineering::Materials
Issue Date: 2022
Source: Zeng, X. M., Ye, P., Tan, H. T., Du, Z. & Gan, C. L. (2022). Tensile behavior of tetragonal zirconia micro/nano-fibers and beams in situ tested by push-to-pull devices. Journal of the American Ceramic Society, 105(9), 5911-5920.
Project: 9013103290
Journal: Journal of the American Ceramic Society
Abstract: The tensile mechanical behavior of tetragonal zirconia micro/nano-fibers and beams was studied with push-to-pull (PTP) devices equipped in an in situ nanoindenter. The small-volume ceramics generally experienced linear elastic deformation before fracture. Polycrystalline and oligocrystalline micro/nano-fibers exhibit a tensile strength of ∼0.9–1.4 GPa, while single-crystal beams exhibit a much higher tensile strength (∼2.1–3.2 GPa). The tensile strength of the small-volume zirconia is found comparable to the corresponding compressive strength, which indicates the large discrepancy between the tensile and compressive strength observed in bulk zirconia becomes insignificant at micro/nano-scales. No martensitic transformation induced shape memory strain was detected in the zirconia fibers and beams. Further variation in dopant concentration and crystal orientation was explored for single-crystal beams and their significance in controlling the tensile strength was discussed. Our work offers a new insight into the mechanical behavior of tetragonal zirconia-based ceramics at small scales.
ISSN: 0002-7820
DOI: 10.1111/jace.18555
Schools: School of Materials Science and Engineering 
Research Centres: Temasek Laboratories @ NTU 
Rights: © 2022 The American Ceramic Society. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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