title: Tetragonal to Cubic Transformation of SiO2-Stabilized ZrO2Polymorph through Dysprosium Substitutions.
abstract: Partially stabilized tetragonal zirconia (t-ZrO2) is of particular interest for hard tissue replacements. Aging-related failures of the ceramic associated with the gradual transformation from t-ZrO2to m-ZrO2(monoclinic zirconia) can lead to its premature removal from the implant site. In addition, monitoring the satisfactory performance of the implant throughout its lifespan without invasive techniques is a challenging task. The magnetic resonance imaging (MRI) contrast ability of dysprosium (Dy3+) is well-established. To this aim, varied levels of Dy3+additions in the ZrO2-SiO2binary oxide system were explored. The results indicate the effective role of Dy3+in the formation of thermally and mechanically stable c-ZrO2(cubic zirconia) phase at higher temperatures. The presence of SiO2influenced the t-ZrO2stabilization, whereas Dy3+tends to occupy the ZrO2lattice sites to induce c-ZrO2transition. Magnetic and MRI tests displayed the commendable contrast ability of Dy3+stabilized ZrO2-SiO2binary systems. Nanoindentation results demonstrate a remarkable enhancement of the mechanical properties.
authors.affiliation: Centre for Nanoscience and Technology, Pondicherry University , Puducherry 605 014, India.|School of Materials, University of Manchester , Manchester M13 9PL, United Kingdom.
authors.forename: Subramaniyan
authors.initials: S
authors.lastname: Vasanthavel
authors.affiliation: School of Materials, University of Manchester , Manchester M13 9PL, United Kingdom.
authors.forename: Brian
authors.identifier: http://orcid.org/0000-0001-5753-0166
authors.initials: B
authors.lastname: Derby
authors.affiliation: Centre for Nanoscience and Technology, Pondicherry University , Puducherry 605 014, India.
authors.forename: Sanjeevi
authors.identifier: http://orcid.org/0000-0003-2285-4907
authors.initials: S
authors.lastname: Kannan