Professor Gustavo Dalpian

@article{Ussui2022,

title = {Room temperature plasticity of zirconia-yttria-titania ceramics: Experimental indications and structural modelling},

author = {Valter Ussui and Dolores Ribeiro Lazar and Nelson de Lima and Anelyse Arata and Fabio Ribeiro and Gustavo M. Dalpian and Juliana Marchi and José Octavio Paschoal},

doi = {10.2298/pac2204367u},

issn = {2406-1034},

year  = {2023},

date = {2023-00-00},

urldate = {2023-00-00},

journal = {PAC},

volume = {16},

number = {4},

pages = {367--373},

publisher = {National Library of Serbia},

abstract = {Yttria-stabilized tetragonal zirconia (Y-TZP) ceramics have excellent

   mechanical properties. However, such materials cannot undergo plastic

   deformation at room temperature due to their high hardness and brittleness

   values, hindering machinability. To overcome these limitations, we propose a

   zirconia-yttria-titania ceramics, based on zirconia containing 3mol% yttria

   and up to 15mol% titania. The zirconia-yttria-titania powders were

   synthesized by co-precipitation method, uniaxially pressed and sintered at

   1400?C/5 h. Sample characterizations were carried out by X-ray diffraction,

   scanning electron microscopy and mechanical properties through Vickers

   hardness and toughness measurements. Compared to the Y-TZP ceramics, the

   yttria stabilised tetragonal zirconia ceramics co-doped with 10mol%Ti showed

   noticeable increase of tetragonality parameter, higher toughness and lower

   hardness values, indicating plasticity at room temperature. Furthermore, the

   atomistic simulation by Density Functional Theory methodology suggests the

   occurrence of spatial arrangement of the atoms, explaining the proposed

   plasticity.},

keywords = {Ceramics and Composites},

pubstate = {published},

tppubtype = {article}

}