Lanthanum zirconate ceramic toughened by ferroelastic domain switching of LaAlO3

被引：23

作者：

Han, Jing ^{[1
]}

Wang, Yanfei ^{[1
]}

Liu, Rongjun ^{[1
]}

Cao, Yingbin ^{[1
]}

机构：

[1] Natl Univ Def Technol, Sci & Technol Adv Ceram Fibers & Composites Lab, Changsha 410073, Hunan, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2018年 / 44卷 / 13期

基金：

美国国家科学基金会;

关键词：

Ferroelastic domain switching; Ferroelastic toughening; Lanthanum zirconate; Lanthanum aluminate; Compressive stress toughening; MECHANICAL-PROPERTIES; FRACTURE-TOUGHNESS; PHASE; STRESS;

D O I：

10.1016/j.ceramint.2018.06.016

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The poor fracture toughness limits the wide application of the cubic lanthanum zirconate (La2Zr2O7) ceramics. The current study reports a dramatic fracture toughness improvement of lanthanum zirconates by the introduction of lanthanum aluminates (LaAlO3), a ferroelastic second phase. A composite ceramic with the composition of x LaAlO3/(1-x) La2Zr2O7, where x = 10, 20, 30, 40, 50 mol%, has been fabricated by a spark plasma sintering method. It is found that, the ferroelastic domains of LaAlO3 in x LaAlO3/(1-x)La2Zr2O7 composite ceramics clearly switch towards a direction that is normal to a propagating crack. In addition, the processing zone width of ferroelastic domains is found to decrease with an increase of LaAlO3 inclusion, attributing to that the residual tensile stress in LaAlO3 caused by the thermal expansion coefficient mismatch, which helps to expand the processing zone, decreases with more LaAlO3 included.

引用

页码：15954 / 15958

页数：5

共 22 条

[1] Materials selection guidelines for low thermal conductivity thermal barrier coatings [J].

Clarke, DR .

SURFACE & COATINGS TECHNOLOGY, 2003, 163 :67-74

[2] THE EFFECT OF BINDER THICKNESS AND RESIDUAL-STRESSES ON THE FRACTURE-TOUGHNESS OF CEMENTED CARBIDES [J].

CUTLER, RA ;

VIRKAR, AV .

JOURNAL OF MATERIALS SCIENCE, 1985, 20 (10) :3557-3573

[3] Synthesis of LaAlO3 based materials for potential use as methane-fueled solid oxide fuel cell anodes [J].

da Silva, Cristiane A. ;

de Miranda, Paulo Emilio V. .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2015, 40 (32) :10002-10015

[4] La2Zr2O7 TBCs toughened by Pt particles prepared by cathode plasma electrolytic deposition [J].

Deng, Shun-jie ;

Wang, Peng ;

He, Ye-dong ;

Zhang, Jin .

INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS, 2016, 23 (06) :704-715

[5]

Evans AG., 1977, P 4 INT C FRACT, V1

[6] Phase diagram of the Al2O3-ZrO2-La2O3 system [J].

Lakiza, SM ;

Lopato, LM .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2005, 25 (08) :1373-1380

[7] Lanthanum zirconate ceramic toughened by BaTiO3 secondary phase [J].

Li, J. Y. ;

Dai, H. ;

Zhong, X. H. ;

Zhang, Y. F. ;

Ma, X. F. ;

Meng, J. ;

Cao, X. Q. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2008, 452 (02) :406-409

[8] Effect of the addition of YAG(Y3Al5O12) nanopowder on the mechanical properties of lanthanum zirconate [J].

Li, J. Y. ;

Dai, H. ;

Zhong, X. H. ;

Zhang, Y. F. ;

Ma, X. F. ;

Meng, J. ;

Cao, X. Q. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2007, 460 :504-508

[9] Dielectric and mechanical characteristics of lanthanum aluminate ceramics with strontium niobate addition [J].

Liu, XQ ;

Chen, XM .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2004, 24 (07) :1999-2004

[10] On a ferroelastic mechanism governing the toughness of metastable tetragonal-prime (t′) yttria-stabilized zirconia [J].

Mercer, C. ;

Williams, J. R. ;

Clarke, D. R. ;

Evans, A. G. .

PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 2007, 463 (2081) :1393-1408

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