Effect of Air and Argon Sintering Atmospheres on Properties and Hydrothermal Aging Resistance of Y-TZP Ceramics

Effect of Air and Argon Sintering Atmospheres on Properties and Hydrothermal Aging Resistance of... JMEPEG ASM International https://doi.org/10.1007/s11665-018-3428-1 1059-9495/$19.00 Effect of Air and Argon Sintering Atmospheres on Properties and Hydrothermal Aging Resistance of Y-TZP Ceramics Sutharsini Ubenthiran, Murugathas Thanihaichelvan, and Ramesh Singh (Submitted October 16, 2017; in revised form May 17, 2018) In this work, we investigated the role of sintering atmosphere and temperature on low-temperature degradation of 3 mol.% yttria tetragonal zirconia polycrystals ceramics. Green compacts were prepared by die-pressing followed by cold isostatic pressing at 200 MPa. The green bodies were sintered between the temperature range of 1250 and 1500 C in air and argon gas atmosphere. Sintered samples were tested to determine bulk density, Youngs modulus, Vickers hardness and fracture toughness. The results revealed that the mechanical properties of air-sintered samples were better than that of argon-sintered samples sintered at 1400 C and below while the argon sintering marginally improves the fracture toughness and hardness when sintered at 1450 C and above. FESEM images showed that the tetragonal grain size was similar when sintered in argon atmosphere. However, regardless of sintering atmosphere, grain growth was inevitable as the sintering temperature was increased. Hydrothermal aging test in superheated steam was performed in an autoclave at temperature of 180 C and 10 http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Materials Engineering and Performance Springer Journals

Effect of Air and Argon Sintering Atmospheres on Properties and Hydrothermal Aging Resistance of Y-TZP Ceramics

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Publisher
Springer US
Copyright
Copyright © 2018 by ASM International
Subject
Materials Science; Characterization and Evaluation of Materials; Tribology, Corrosion and Coatings; Quality Control, Reliability, Safety and Risk; Engineering Design
ISSN
1059-9495
eISSN
1544-1024
D.O.I.
10.1007/s11665-018-3428-1
Publisher site
See Article on Publisher Site

Abstract

JMEPEG ASM International https://doi.org/10.1007/s11665-018-3428-1 1059-9495/$19.00 Effect of Air and Argon Sintering Atmospheres on Properties and Hydrothermal Aging Resistance of Y-TZP Ceramics Sutharsini Ubenthiran, Murugathas Thanihaichelvan, and Ramesh Singh (Submitted October 16, 2017; in revised form May 17, 2018) In this work, we investigated the role of sintering atmosphere and temperature on low-temperature degradation of 3 mol.% yttria tetragonal zirconia polycrystals ceramics. Green compacts were prepared by die-pressing followed by cold isostatic pressing at 200 MPa. The green bodies were sintered between the temperature range of 1250 and 1500 C in air and argon gas atmosphere. Sintered samples were tested to determine bulk density, Youngs modulus, Vickers hardness and fracture toughness. The results revealed that the mechanical properties of air-sintered samples were better than that of argon-sintered samples sintered at 1400 C and below while the argon sintering marginally improves the fracture toughness and hardness when sintered at 1450 C and above. FESEM images showed that the tetragonal grain size was similar when sintered in argon atmosphere. However, regardless of sintering atmosphere, grain growth was inevitable as the sintering temperature was increased. Hydrothermal aging test in superheated steam was performed in an autoclave at temperature of 180 C and 10

Journal

Journal of Materials Engineering and PerformanceSpringer Journals

Published: May 29, 2018

References

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