Evolution of microstructure and residual stresses in gradually ground/polished 3Y-TZP |
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| Affiliation: | 1. Biomaterials, Biomechanics and Tissue Engineering Group (BBT), Department of Materials Science and Metallurgical Engineering, Universitat Politècnica de Catalunya, 08019 Barcelona, Spain;2. Center for Structural Integrity, Reliability and Micromechanics of Materials (CIEFMA), Department of Materials Science and Metallurgical Engineering, Universitat Politècnica de Catalunya, 08019 Barcelona, Spain;3. Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya, 08019 Barcelona, Spain;4. Functional Materials, Department of Materials Science and Engineering, Saarland University, 66123 Saarbruecken, Germany;5. Institute for Bioengineering of Catalonia (IBEC), Barcelona Institute of Technology (BIST), 08028 Barcelona, Spain;1. Instituto de Investigaciones en Ciencia y Tecnología de Materiales (INTEMA), CONICETUNMdP, B7606BWV, Mar del Plata, Argentina;2. Laboratorio de Materiales y Superficies, Departamento de Física Aplicada I, Universidad de Málaga, 29071, Málaga, Spain;3. Departamento de Ingeniería Química, Universidad de Málaga, 29071, Málaga, Spain;1. Department of Physics, Quaid-i-Azam University, Islamabad, Pakistan;2. Department of Physics and Astronomy, University of Delaware, Newark, Delaware, 19716, USA;3. Department of Material Science and Engineering, University of Delaware, Newark, DE, 19716, USA;4. Comstech Secretariat, Islamabad, 44000, Pakistan;1. Bundesanstalt für Materialforschung und -prüfung (BAM), Unter den Eichen 87, 12205 Berlin, Germany;2. University of Potsdam, Institute of Physics and Astronomy, Karl-Liebknecht-Str.24-25, 14476 Potsdam, Germany;1. University of São Paulo, São Carlos School of Engineering, Department of Materials Engineering, Av. João Dagnone 1100, 13563-120, São Carlos, SP, Brazil;2. Saarland University, Department of Materials Science and Engineering, Campus D3.3, 66123, Saarbrücken, Germany;3. Brazilian Synchrotron Light Laboratory, Brazilian Center for Research in Energy and Materials, R. Giuseppe Maximo Scolfaro 10000, 13083-970, Campinas, Brazil;4. SENAI CIMATEC, Institute of Innovation for Forming and Joining of Materials, Av. Orlando Gomes 1845, 41650-010, Salvador, Brazil;5. Pontifical Catholic University of Minas Gerais, Av. Dom José Gaspar 500, 30535-901, Belo Horizonte, Brazil;6. AB Sandvik Coromant R&D, Lerkrogsvägen 19, SE, 12680, Stockholm, Sweden |
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| Abstract: | A comprehensive study of progressively ground/polished 3Y-TZP was performed with the aim of better understanding the mechanisms driving the microstructural modifications observed after such procedures, and identifying the processing parameters leading to optimal microstructures (i.e. ageing-protective and damage-free). Gradually ground/polished surfaces were produced, yielding four different topographies of increasing roughness (grades 1–4) and two different textures (unidirectionally, U, and multidirectionally, M). Phase transformation, microstructure and residual stresses were investigated by means of advanced characterization techniques. It was found that low-roughness mildly ground/polished specimens (i.e. 2-M/U) presented a nanometric layer with the ageing-related protective features generally associated with coarsely ground specimens. A lower limit for grain refinement in terms of surface abrasion was also found, in which partial recrystallization took place (i.e. 1-M/U). A mathematical relation was established between average surface roughness (Sa), monoclinic volume fraction (Vm) and surface compressive residual stresses, demonstrating that if the processing parameters are controlled, both Vm and residual stresses can be predicted by the measurement of Sa. |
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| Keywords: | Zirconia Grinding Microstructure Phase transformation Residual stresses |
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