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HfO2 doped 3Y-TZP on mechanical properties and low temperature degradation (LTD).
- Source :
-
Ceramics International . May2024, Vol. 50 Issue 10, p17890-17897. 8p. - Publication Year :
- 2024
-
Abstract
- The mechanical properties and ageing resistance of 0.5–10 mol% HfO 2 doped 3Y-TZP have been investigated. All samples were sintered at 1500 ◦C-2 h and characterized by density testing. Samples with polished surfaces were submitted to X-Ray diffraction (XRD) and microstructure testing and then cut into standards for 3-point bending testing. Group 2 was characterized by Vickers hardness and fracture toughness. Group 3 was accelerated ageing procession in autoclave condition containing at 134 °C and 0.2 MPa 10 h up to 40 h, and then detected by transmission electron microscopy (TEM) analysis. All sintered specimens presented nearly full densification. The grain size of 3Y0.5Hf-TZP was smaller than that of undoped 3Y-TZP after sintering. 3Y0.5Hf-TZP enhanced the bending strength by 34.6% compared to 3Y-TZP. The ageing kinetic parameter (n ∼ (0.66–1.64)) was related to the grain size and the ageing time from the onset of the transition until the transition reaches saturation. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02728842
- Volume :
- 50
- Issue :
- 10
- Database :
- Academic Search Index
- Journal :
- Ceramics International
- Publication Type :
- Academic Journal
- Accession number :
- 176436570
- Full Text :
- https://doi.org/10.1016/j.ceramint.2024.02.277