Formation and mechanical properties of alumina ceramics based on Al2O3 micro- and nanoparticles

Research outputpeer-review

8 Citations (Scopus)

Abstract

Alumina micro- and nanopowders with the particle size from 200 mu m to 40 nm synthesized by the sol-gel method are studied. The particle size dependence of gamma-Al2O3 ->alpha-Al2O3 phase transformation is studied by differential thermal analysis, X-ray diffraction method, and transmission electron microscopy. X-ray diffraction data show that for alumina nanoparticles gamma-Al2O3 ->alpha-Al2O3 phase transformation occurs at 900A degrees C, and for micro-particles it occurs in the temperature range 1150-1200A degrees C. The alumina ceramics produced of alumina nanoparticles is shown to have higher flexural strength under three-point bending than the ceramics produced of micro-particles. The obtained results demonstrate that alumina particle size reduction stabilizes the formation of alpha-Al2O3 at lower temperatures, due to which the grain growth rate decreases and the flexural strength of monolithic oxide ceramics increases.
Original languageEnglish
Pages (from-to)134-138
Number of pages5
JournalPhysical Mesomechanics
Volume18
Issue number2
DOIs
Publication statusPublished - 2015

Fingerprint

Aluminum Oxide
microparticles
Alumina
aluminum oxides
mechanical properties
ceramics
Nanoparticles
Mechanical properties
nanoparticles
flexural strength
Particle size
Bending strength
phase transformations
Phase transitions
X ray diffraction
Grain growth
diffraction
Differential thermal analysis
Oxides
Sol-gel process

Scopus subject areas

  • Materials Science(all)

Cite this

@article{cc5202c1d6ea48e0b9be3cde29b2f0b1,
title = "Formation and mechanical properties of alumina ceramics based on Al2O3 micro- and nanoparticles",
abstract = "Alumina micro- and nanopowders with the particle size from 200 mu m to 40 nm synthesized by the sol-gel method are studied. The particle size dependence of gamma-Al2O3 ->alpha-Al2O3 phase transformation is studied by differential thermal analysis, X-ray diffraction method, and transmission electron microscopy. X-ray diffraction data show that for alumina nanoparticles gamma-Al2O3 ->alpha-Al2O3 phase transformation occurs at 900A degrees C, and for micro-particles it occurs in the temperature range 1150-1200A degrees C. The alumina ceramics produced of alumina nanoparticles is shown to have higher flexural strength under three-point bending than the ceramics produced of micro-particles. The obtained results demonstrate that alumina particle size reduction stabilizes the formation of alpha-Al2O3 at lower temperatures, due to which the grain growth rate decreases and the flexural strength of monolithic oxide ceramics increases.",
author = "E.G. Zemtsova and A.V. Monin and V.M. Smirnov and B.N. Semenov and N.F. Morozov",
year = "2015",
doi = "10.1134/S1029959915020058",
language = "English",
volume = "18",
pages = "134--138",
journal = "Physical Mesomechanics",
issn = "1029-9599",
publisher = "Springer",
number = "2",

}

TY - JOUR

T1 - Formation and mechanical properties of alumina ceramics based on Al2O3 micro- and nanoparticles

AU - Zemtsova, E.G.

AU - Monin, A.V.

AU - Smirnov, V.M.

AU - Semenov, B.N.

AU - Morozov, N.F.

PY - 2015

Y1 - 2015

N2 - Alumina micro- and nanopowders with the particle size from 200 mu m to 40 nm synthesized by the sol-gel method are studied. The particle size dependence of gamma-Al2O3 ->alpha-Al2O3 phase transformation is studied by differential thermal analysis, X-ray diffraction method, and transmission electron microscopy. X-ray diffraction data show that for alumina nanoparticles gamma-Al2O3 ->alpha-Al2O3 phase transformation occurs at 900A degrees C, and for micro-particles it occurs in the temperature range 1150-1200A degrees C. The alumina ceramics produced of alumina nanoparticles is shown to have higher flexural strength under three-point bending than the ceramics produced of micro-particles. The obtained results demonstrate that alumina particle size reduction stabilizes the formation of alpha-Al2O3 at lower temperatures, due to which the grain growth rate decreases and the flexural strength of monolithic oxide ceramics increases.

AB - Alumina micro- and nanopowders with the particle size from 200 mu m to 40 nm synthesized by the sol-gel method are studied. The particle size dependence of gamma-Al2O3 ->alpha-Al2O3 phase transformation is studied by differential thermal analysis, X-ray diffraction method, and transmission electron microscopy. X-ray diffraction data show that for alumina nanoparticles gamma-Al2O3 ->alpha-Al2O3 phase transformation occurs at 900A degrees C, and for micro-particles it occurs in the temperature range 1150-1200A degrees C. The alumina ceramics produced of alumina nanoparticles is shown to have higher flexural strength under three-point bending than the ceramics produced of micro-particles. The obtained results demonstrate that alumina particle size reduction stabilizes the formation of alpha-Al2O3 at lower temperatures, due to which the grain growth rate decreases and the flexural strength of monolithic oxide ceramics increases.

U2 - 10.1134/S1029959915020058

DO - 10.1134/S1029959915020058

M3 - Article

VL - 18

SP - 134

EP - 138

JO - Physical Mesomechanics

JF - Physical Mesomechanics

SN - 1029-9599

IS - 2

ER -