Structural, Mechanical, and Transport Properties of Scandia and Yttria Partially Stabilized Zirconia Crystals

被引：2

作者：

Agarkova, E. A. ^{[1
]}

Borik, M. A. ^{[2
]}

Kulebyakin, A. V. ^{[2
]}

Kuritsyna, I. E. ^{[1
]}

Lomonova, E. E. ^{[2
]}

Milovich, F. O. ^{[3
]}

Myzina, V. A. ^{[2
]}

Osiko, V. V. ^{[2
]}

Tabachkova, N. Yu. ^{[2
,3
]}

机构：

[1] Russian Acad Sci, Inst Solid State Phys, Akad Osipyana 2, Chernogolovka 142432, Moscow Oblast, Russia

[2] Russian Acad Sci, Prokhorov Gen Phys Inst, Ul Vavilova 38, Moscow 119991, Russia

[3] Natl Univ Sci & Technol, Moscow Inst Steel & Alloys, Leninskii Pr 4, Moscow 119049, Russia

来源：

INORGANIC MATERIALS | 2019年 / 55卷 / 07期

基金：

俄罗斯基础研究基金会;

关键词：

solid electrolyte; zirconia; crystal growth; ionic conductivity; mechanical properties; PHASE-COMPOSITION; MELT;

D O I：

10.1134/S0020168519070021

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

-Crystals of (ZrO2)(1 -x - y)(Sc2O3)(x)(Y2O3)(y) (x = 0.003-0.045, y = 0.005-0.03) solid solutions have been grown by directional solidification in a cold crucible. All of the crystals consist of a mixture of two tetragonal phases of zirconia, t and t', differing in the degree of tetragonality (c/): 1.014-1.015 and 1.004-1.005 for the t- and t'-phases, respectively. All of the crystals have high microhardness (13.5-15.0 GPa) and high fracture toughness (on the order of 6-7 MPa m(1/2)). Their fracture toughness decreases with an increase in the total content of the stabilizing oxides, which is well consistent with the associated changes in phase composition, namely, with the increase in the percentage of the (transformable) t-phase. All of the crystals are similar in electrical conductivity: on the order of 0.04 S/cm at a temperature of 1173 K.

引用

页码：748 / 753

页数：6

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