Sintering and densification behavior of ZnO-doped Y-TZP ceramics

Umma Sankar, Meenaloshini Satgunam, Mahdi Amiriyan, Ramesh Singh, W. D. Teng

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

The effect on densification and mechanical properties of 3 mol% Y-TZP ceramics doped with zinc oxide (0.1 wt.% to 1 wt.%), has been investigated in this study. Green samples were compacted by uniaxial pressing and cold isostatically pressed at 200 MPa. All samples have been sintered over the temperature range of 1250°C to 1500°C with a ramp rate of 10°C/ minute and 2 hours of holding time. In addition to that, the tetragonal phase stability of the samples was also studied in superheated steam at 180°C/10 bar for up to 50 h. The sintered bodies were examined to determine the phase content, bulk density, Young's modulus, Vickers hardness and fracture toughness. The results showed that the addition of 1 wt.% ZnO was effective in aiding densification (∼99% theoretical density). It also improved the matrix stiffness (∼208 GPa) and Vickers hardness (∼13 GPa), when the samples were sintered below 1300°C comparing to the undoped Y-TZP sintered at the same temperature. In contrast, ZnO addition to the Y-TZP matrix displayed a tendency to change hydrothermal ageing behavior as it was noticed that the monoclinic content increased with increasing content of dopant. The undoped samples showed a better hydrothermal ageing behavior at 1300°C compared to the doped samples.

Original languageEnglish
Title of host publicationExperimental Mechanics and Materials
Pages197-203
Number of pages7
DOIs
Publication statusPublished - 01 Sep 2011
EventInternational Conference on Experimental Mechanics 2010, ICEM10 - Kuala Lumpur, Malaysia
Duration: 29 Nov 201001 Dec 2010

Publication series

NameApplied Mechanics and Materials
Volume83
ISSN (Print)1660-9336
ISSN (Electronic)1662-7482

Other

OtherInternational Conference on Experimental Mechanics 2010, ICEM10
CountryMalaysia
CityKuala Lumpur
Period29/11/1001/12/10

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All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Sankar, U., Satgunam, M., Amiriyan, M., Singh, R., & Teng, W. D. (2011). Sintering and densification behavior of ZnO-doped Y-TZP ceramics. In Experimental Mechanics and Materials (pp. 197-203). (Applied Mechanics and Materials; Vol. 83). https://doi.org/10.4028/www.scientific.net/AMM.83.197