Behavior of ceramics based on Al2O3 and ZrO2 nanopowders under gamma-ray irradiation

被引：2
作者：
Khrustov V.R. [1 ]
Ivanov V.V. [1 ]
Zayats S.V. [1 ]
Kaygorodov A.S. [1 ]
Paranin S.N. [1 ]
Cholakh S.O. [2 ]
机构：
[1] Institute of Electrophysics, Ural Branch, Russian Academy of Sciences, Yekaterinburg
[2] Ural Federal University, Yekaterinburg
来源：
Inorganic Materials: Applied Research | 2014年 / 5卷 / 05期
基金：
俄罗斯基础研究基金会;
关键词：
aluminum oxide; ceramic; corundum; gamma-ray irradiation dose; grain size; microhardness; microstructure; ultimate bending strength; unit cell parameter; wear resistance; zirconium oxide;
D O I：
10.1134/S2075113314050098
中图分类号：
学科分类号：
摘要：
Hardness, fracture strength, wear resistance, and ultimate bending strength of ceramics based on aluminum oxide irradiated with gamma rays (0.8 MeV) up to 2000 Mrad are studied. It is found that mechanical properties of ceramics in which corundum prevails deteriorate under irradiation. Most resistant to gamma irradiation is a ceramic consisting of equal volume fractions of Al2O3 and 2.5 mol % of Y2O3 in ZrO2 (2.5YSZ) solid solution. A different trend of change in the unit cell parameter of the corundum crystal lattice under increasing irradiation dose is detected: as the irradiation dose increases, the unit cell parameter of the corundum crystal lattice increases in ceramics including zirconium oxide (α-Al2O3 + 10% ZrO2) (ZTA10) and α-Al2O3 + 55% YSZ (ATZ50)), and vice versa, it decreases if there is no zirconium oxide in the composition (Al2O3, α-Al2O3 + 4% MgAl2O4 (AM1)). © 2014, Pleiades Publishing, Ltd.
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页码：482 / 487
页数：5
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