Nanomechanical properties of zirconia- yttria and alumina zirconia- yttria biomedical ceramics,subjected to low temperature aging |
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| Affiliation: | 1. Centro de Investigación en Materiales Avanzados S.C., and Laboratorio Nacional de Nanotecnología, Miguel de Cervantes 120, Complejo Industrial Chihuahua, C.P. 31109, México;2. Facultad de Odontología, Universidad Autónoma de Chihuahua, Pascual Orozco y Avenida Universidad, s/n C.P. 31000, Mexico;3. Centro de Ingeniería y Desarrollo Industrial, Santiago de Querétaro 76130, Qro, México;4. Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA;1. Department of Materials and Metallurgical Engineering, Iran University of Science and Technology, Tehran, Iran;2. National Cell Bank of Iran, Pasteur Institute of Iran, PO Box 13169-43551, Tehran, Iran;3. International Center for Young Scientists (ICYS), National Institute for Materials Science (NIMS), Tsukuba, Japan;1. University of Stuttgart, IFKB, Allmandring 7b, D-70569 Stuttgart, Germany;2. Department of Applied Science and Technology, INSTM – R.U. PoliTO – LINCE Laboratory, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Torino, Italy;3. Department of Materials Science and Metallurgy, Universitat Politècnica de Catalunya – BarcelonaTech UPC, Avenida Diagonal 647, 08028 Barcelona, Spain;1. KU Leuven, Department of Materials Engineering, Kasteelpark Arenberg 44, Belgium;2. KU Leuven BIOMAT, Department of Oral Health Sciences, KU Leuven & Dentistry, University Hospitals Leuven, Belgium;3. UMR CNRS 5510 (MATEIS), National Institute of Applied Sciences, INSA de Lyon, France;1. Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg, Belgium;2. KU Leuven BIOMAT, Department of Oral Health Sciences, KU Leuven & Dentistry, University Hospitals Leuven, Belgium |
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| Abstract: | Samples of ZTA composites {80 wt%Al2O3+20 wt%TZ-3Y}, ATZ composites {20 wt%Al2O3+80 wt%TZ-3Y}, tetragonal polycrystalline zirconia (3Y-TZP), and cubic stabilized zirconia (8Y-CSZ) were prepared to study the nanomechanical properties by nanoindentation before and after low temperature aging or degradation. Moreover, structural properties and crystalline present phases were evaluated by X-Ray Diffraction (XRD) and Electron Diffraction Patterns from transmission electron microscopy (TEM). The 8Y-CSZ ceramic showed the best mechanical behavior among all the analyzed materials (ZTA, ATZ and 3Y-TZP), the 8Y-CSZ sample did not showed any phases transformations when subjected to low temperature degradation (LTD). Absolute nanohardness, Young's modulus and fracture toughness after the LTD were carried out in different samples, the obtained results, in a decreasing order were: 8Y-CSZ>ZTA>3Y-TZP>ATZ, 8Y-CSZ>3Y-TZP>ZTA>ATZ and 8Y-CSZ>3Y-TZP>ATZ>ZTA, respectively. The 8Y-CSZ ceramic, did not showed any variations in nanomechanical properties due to the absence of anisotropic behavior, manifesting high hardness, elastic modulus and relative values of fracture toughness. Perhaps this material could be candidate for biomedical applications. |
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| Keywords: | Zirconia and Alumina Ceramics Mechanical properties Nanoindentation |
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