Sintering and Densification Behavior of Nb2 O5 - doped Y-TZP Ceramics

D., NAMASIVAYAM and D., RAGURAJAN and M., GOLIESKARDI and M., SATGUNAM (2014) Sintering and Densification Behavior of Nb2 O5 - doped Y-TZP Ceramics. In: International Conference on Advances In Mechanical, Aeronautical and Production Techniques - MAPT 2014, 02 - 03 August, 2014, Kuala Lumpur, Malaysia.

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The effect on densification and mechanical properties of 3 mol% Y-TZP ceramics doped with niobium 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. The sintered bodies were examined to determine the phase content, bulk density, Vickers hardness and flexural strength of the Y-TZP material. The results showed that the addition of 1 wt. % Nb2O5 was effective in aiding densification (~99% theoretical density). It also improved the Vickers hardness (~13 GPa), when the samples were sintered below 1300°C compared to the undoped Y-TZP sintered at the same temperature. The Nb2O5 addition to the Y-TZP matrix also displayed an increment of flexural strength as the dopant content was increased.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Niobium Pentoxide; sintering behaviour; Y-TZP; Ageing
Depositing User: Mr. John Steve
Date Deposited: 28 May 2019 09:25
Last Modified: 28 May 2019 09:25

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