TU Darmstadt / ULB / TUbiblio

Thermomechanical analysis of 0.94Na1/2Bi1/2TiO3-0.06BaTiO3/ZnOcomposites usingfinite element method

Meena, Manish Kumar ; Kumar, Manish ; Kodumudi Venkataraman, Lalitha ; Patel, Satyanarayan (2021)
Thermomechanical analysis of 0.94Na1/2Bi1/2TiO3-0.06BaTiO3/ZnOcomposites usingfinite element method.
In: Journal of Alloys and Compounds, 854
doi: 10.1016/j.jallcom.2020.157161
Article, Bibliographie

Abstract

Object-orientedfinite element (OOF2) analysis has been carried out on composites constituting of 0.94Na0.5Bi0.5TiO3-0.06BaTiO3(NBT-6BT) matrix phase and ZnO inclusions (4%, 7.5%, 10.78%, and 14% byvolume). The effect of ZnO inclusions on the thermomechanical properties of NBT-6BT is investigated andthe results are compared with theoretical methods. The thermal stress and strain variation are analyzedunder the homogeneous and heterogeneous temperature conditions as a function of volume fraction ofthe inclusions. The residual stresses localized at the NBT-6BT/ZnO interface are evaluated using the realmicrostructure of the composite (SEM micrographs), thus providing an actual spatial distribution ofstress in the material. In the case of a gradient temperature application, orientation of the grain alsovaries the stress concentration. Based on the above, the depolarization temperature of the composite canbe further improved if the ZnO nano-wire/nano-rods are used instead of ZnO nanoparticle/powder(depending on the orientation of nanowire). Further, the elastic loading conditions mimic the experi-mental response and as expected, material failure initiates at the pores thus validating the model.

Item Type: Article
Erschienen: 2021
Creators: Meena, Manish Kumar ; Kumar, Manish ; Kodumudi Venkataraman, Lalitha ; Patel, Satyanarayan
Type of entry: Bibliographie
Title: Thermomechanical analysis of 0.94Na1/2Bi1/2TiO3-0.06BaTiO3/ZnOcomposites usingfinite element method
Language: English
Date: 15 February 2021
Publisher: Elsevier
Journal or Publication Title: Journal of Alloys and Compounds
Volume of the journal: 854
DOI: 10.1016/j.jallcom.2020.157161
Abstract:

Object-orientedfinite element (OOF2) analysis has been carried out on composites constituting of 0.94Na0.5Bi0.5TiO3-0.06BaTiO3(NBT-6BT) matrix phase and ZnO inclusions (4%, 7.5%, 10.78%, and 14% byvolume). The effect of ZnO inclusions on the thermomechanical properties of NBT-6BT is investigated andthe results are compared with theoretical methods. The thermal stress and strain variation are analyzedunder the homogeneous and heterogeneous temperature conditions as a function of volume fraction ofthe inclusions. The residual stresses localized at the NBT-6BT/ZnO interface are evaluated using the realmicrostructure of the composite (SEM micrographs), thus providing an actual spatial distribution ofstress in the material. In the case of a gradient temperature application, orientation of the grain alsovaries the stress concentration. Based on the above, the depolarization temperature of the composite canbe further improved if the ZnO nano-wire/nano-rods are used instead of ZnO nanoparticle/powder(depending on the orientation of nanowire). Further, the elastic loading conditions mimic the experi-mental response and as expected, material failure initiates at the pores thus validating the model.

Uncontrolled Keywords: Object-orientedfinite element (OOF2), CeramicsPiezoelectricity Thermal analysis, NBT-BT
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
Date Deposited: 04 Feb 2021 06:06
Last Modified: 04 Feb 2021 06:06
PPN:
Export:
Suche nach Titel in: TUfind oder in Google
Send an inquiry Send an inquiry

Options (only for editors)
Show editorial Details Show editorial Details