Lattice variations in nanocrystalline Y2O3 confined in magnesia (MgO) matrix

Chen Barad; Giora Kimmel; Dror Shamir; Kachal Hirshberg; Yaniv Gelbstein

doi:https://doi.org/10.1016/j.jallcom.2019.06.141

Lattice variations in nanocrystalline Y₂O₃ confined in magnesia (MgO) matrix

Chen Barad, Giora Kimmel, Dror Shamir, Kachal Hirshberg, Yaniv Gelbstein

Department of Materials Engineering

Ben-Gurion University of the Negev

Research output: Contribution to journal › Article › peer-review

Abstract

A special routine for suppression the grain growth process of yttrium oxide (Y₂O₃) by confining its nano crystallites in a polycrystalline magnesium oxide (MgO) matrix via the sol-gel method is currently being reported. The binary system of Y₂O₃-MgO was investigated as a function of the concentration of Y₂O₃ and calcination temperature. Enhanced isotropic uniform stresses during cooling down caused by the doubled thermal expansion coefficient of the MgO matrix were calculated. Both effects of applied hydrostatic pressure and inhibited grain growth of Y₂O₃ on the crystallographic phase transitions and morphology were investigated in the unique system of Y₂O₃-MgO.

Original language	American English
Pages (from-to)	375-380
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	801
DOIs	https://doi.org/10.1016/j.jallcom.2019.06.141
State	Published - 15 Sep 2019

Keywords

Ceramics
Crystal structure
Scaning Electrom Microscope (SEM)
Sol-gel processes
X-ray diffraction

All Science Journal Classification (ASJC) codes

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

https://doi.org/10.1016/j.jallcom.2019.06.141

Cite this

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title = "Lattice variations in nanocrystalline Y2O3 confined in magnesia (MgO) matrix",

abstract = "A special routine for suppression the grain growth process of yttrium oxide (Y2O3) by confining its nano crystallites in a polycrystalline magnesium oxide (MgO) matrix via the sol-gel method is currently being reported. The binary system of Y2O3-MgO was investigated as a function of the concentration of Y2O3 and calcination temperature. Enhanced isotropic uniform stresses during cooling down caused by the doubled thermal expansion coefficient of the MgO matrix were calculated. Both effects of applied hydrostatic pressure and inhibited grain growth of Y2O3 on the crystallographic phase transitions and morphology were investigated in the unique system of Y2O3-MgO.",

keywords = "Ceramics, Crystal structure, Scaning Electrom Microscope (SEM), Sol-gel processes, X-ray diffraction",

author = "Chen Barad and Giora Kimmel and Dror Shamir and Kachal Hirshberg and Yaniv Gelbstein",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

year = "2019",

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doi = "https://doi.org/10.1016/j.jallcom.2019.06.141",

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T1 - Lattice variations in nanocrystalline Y2O3 confined in magnesia (MgO) matrix

AU - Barad, Chen

AU - Kimmel, Giora

AU - Shamir, Dror

AU - Hirshberg, Kachal

AU - Gelbstein, Yaniv

PY - 2019/9/15

Y1 - 2019/9/15

N2 - A special routine for suppression the grain growth process of yttrium oxide (Y2O3) by confining its nano crystallites in a polycrystalline magnesium oxide (MgO) matrix via the sol-gel method is currently being reported. The binary system of Y2O3-MgO was investigated as a function of the concentration of Y2O3 and calcination temperature. Enhanced isotropic uniform stresses during cooling down caused by the doubled thermal expansion coefficient of the MgO matrix were calculated. Both effects of applied hydrostatic pressure and inhibited grain growth of Y2O3 on the crystallographic phase transitions and morphology were investigated in the unique system of Y2O3-MgO.

AB - A special routine for suppression the grain growth process of yttrium oxide (Y2O3) by confining its nano crystallites in a polycrystalline magnesium oxide (MgO) matrix via the sol-gel method is currently being reported. The binary system of Y2O3-MgO was investigated as a function of the concentration of Y2O3 and calcination temperature. Enhanced isotropic uniform stresses during cooling down caused by the doubled thermal expansion coefficient of the MgO matrix were calculated. Both effects of applied hydrostatic pressure and inhibited grain growth of Y2O3 on the crystallographic phase transitions and morphology were investigated in the unique system of Y2O3-MgO.

KW - Ceramics

KW - Crystal structure

KW - Scaning Electrom Microscope (SEM)

KW - Sol-gel processes

KW - X-ray diffraction

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