Mechanical properties and low-temperature aging of tetragonal zirconia polycrystals processed by hot isostatic pressing

J. Muñoz-Saldaña, H. Balmori-Ramírez, D. Jaramillo-Vigueras, T. Iga, G. A. Schneider

Research output: Contribution to journalArticle

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Abstract

The influence of grain size and density of yttria-tetragonal zirconia polycrystals (Y-TZPs) ceramics on mechanical properties and on low-temperature aging degradation (LTD) in air and in hot water was investigated. A TZP powder containing 3 mol% Y2O3 was consolidated by slip casting and densified by the sintering/hot isostatic pressing (HIP) method. Only the presintered samples that contained less than 0.15% open porosity reached near full density after HIP. The best conditions to reach full density were found to be attained by presintering and HIP both at 1400 °C. At these conditions, some of the best mechanical properties such as modulus of rupture and Weibull modulus reached 1397 ± 153 MPa and, 10.6, respectively. These values were clearly higher than those obtained from sintered bodies and samples hot isostatically pressed at 1600 °C. Aging degradation of 3Y-TZP materials can be avoided through microstructural design. Fully dense materials with a critical grain size <0.36 μm did not show any evidence of degradation after extreme aging conditions at pressurized autoclaving in hot water at 100, 200, and 260 °C for 8 h. We propose a criterion to predict degradation in air as well as in hot water for the characterized materials based on the microstructure and density control of the samples.
Original languageAmerican English
Pages (from-to)2415-2426
Number of pages2172
JournalJournal of Materials Research
DOIs
StatePublished - 1 Jan 2003
Externally publishedYes

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hot isostatic pressing
Hot isostatic pressing
Polycrystals
polycrystals
zirconium oxides
Zirconia
Aging of materials
mechanical properties
degradation
Degradation
Mechanical properties
Water
sintering
autoclaving
grain size
slip casting
water
Temperature
Yttrium oxide
air

Cite this

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title = "Mechanical properties and low-temperature aging of tetragonal zirconia polycrystals processed by hot isostatic pressing",
abstract = "The influence of grain size and density of yttria-tetragonal zirconia polycrystals (Y-TZPs) ceramics on mechanical properties and on low-temperature aging degradation (LTD) in air and in hot water was investigated. A TZP powder containing 3 mol{\%} Y2O3 was consolidated by slip casting and densified by the sintering/hot isostatic pressing (HIP) method. Only the presintered samples that contained less than 0.15{\%} open porosity reached near full density after HIP. The best conditions to reach full density were found to be attained by presintering and HIP both at 1400 °C. At these conditions, some of the best mechanical properties such as modulus of rupture and Weibull modulus reached 1397 ± 153 MPa and, 10.6, respectively. These values were clearly higher than those obtained from sintered bodies and samples hot isostatically pressed at 1600 °C. Aging degradation of 3Y-TZP materials can be avoided through microstructural design. Fully dense materials with a critical grain size <0.36 μm did not show any evidence of degradation after extreme aging conditions at pressurized autoclaving in hot water at 100, 200, and 260 °C for 8 h. We propose a criterion to predict degradation in air as well as in hot water for the characterized materials based on the microstructure and density control of the samples.",
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Mechanical properties and low-temperature aging of tetragonal zirconia polycrystals processed by hot isostatic pressing. / Muñoz-Saldaña, J.; Balmori-Ramírez, H.; Jaramillo-Vigueras, D.; Iga, T.; Schneider, G. A.

In: Journal of Materials Research, 01.01.2003, p. 2415-2426.

Research output: Contribution to journalArticle

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AU - Balmori-Ramírez, H.

AU - Jaramillo-Vigueras, D.

AU - Iga, T.

AU - Schneider, G. A.

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