Preparation and properties of lanthana doped ZTA ceramics with plate-like crystals by microwave sintering

被引：0

作者：

Lu, H. -X. ^{[1
]}

Cai, Y. ^{[1
]}

He, M. ^{[1
]}

Fan, B. -B. ^{[1
]}

Zhang, L. -W. ^{[1
,2
]}

Chen, D. -L. ^{[1
]}

Wang, H. -L. ^{[1
]}

Yang, D. -Y. ^{[1
]}

Xu, H. -L. ^{[1
]}

Zhang, R. ^{[1
,3
]}

机构：

[1] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Peoples R China

[2] Xinxiang Univ, Xinxiang 453003, Peoples R China

[3] Zhengzhou Inst Aeronaut Ind Management, Zhengzhou 450015, Peoples R China

来源：

MATERIALS RESEARCH INNOVATIONS | 2012年 / 16卷 / 06期

基金：

中国国家自然科学基金;

关键词：

ZTA; Microwave sintering; Plate-like crystals; Toughening; ALUMINA; COMPOSITES; BEHAVIOR;

D O I：

10.1179/1433075X12Y.0000000023

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Lanthana doped zirconia toughened alumina (ZTA) ceramics with in situ formation of plate-like crystals have been prepared by microwave sintering derived from ZrOCl2 center dot 8H(2)O, Al(NO3)(3)center dot 9H(2)O and La(NO3)(3)center dot 6H(2)O. Samples were detected for phase analysis by X-ray diffraction, and the microstructure was examined using SEM. In addition, the sintering behaviour and mechanical properties (hardness and fracture toughness) of the ZTA material were investigated. Results show that LaAl11O18 plate-like crystals are formed in situ in the ZTA matrix when a certain amount of La2O3 is added, and the quantity, size, dispersion degree and crystallite growth of LaAl11O18 crystals are greatly influenced by microwave sintering. Compared to traditional sintering, samples obtained by microwave sintering possess improved performances. The optimal mechanical properties are achieved by doping of 1.5 mol.-%La2O3, with fracture toughness and Vickers hardness being 7.1 MPa m(1/2) and 17.2 GPa respectively.

引用

页码：406 / 412

页数：7

共 23 条

[11] LANGE FF, 1982, J MATER SCI, V17, P225, DOI 10.1007/BF00809057
[12] Evolution of crystalline aluminates from hybrid gel-derived precursors studied by XRD and multinuclear solid state MAS NMR -: III.: Lanthanum hexaluminate, LaAl11O18
MacKenzie, KJD
Schmucker, M
Mayer, L
[J]. THERMOCHIMICA ACTA, 1999, 335 (1-2) : 73 - 78
[13] Microwave sintering of alumina-zirconia nanocomposites
Menezes, R. R.
Kiminami, R. H. G. A.
[J]. JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2008, 203 (1-3) : 513 - 517
[14] EVALUATION OF KLC OF BRITTLE SOLIDS BY THE INDENTATION METHOD WITH LOW CRACK-TO-INDENT RATIOS
NIIHARA, K
MORENA, R
HASSELMAN, DPH
[J]. JOURNAL OF MATERIALS SCIENCE LETTERS, 1982, 1 (01) : 13 - 16
[15] Preparation and properties of porous lanthanum doped alumina ceramic composites with self-organization
Nishio, Yoshitoyo
Ozawa, Masakuni
[J]. JOURNAL OF THE CERAMIC SOCIETY OF JAPAN, 2009, 117 (1364) : 499 - 502
[16] SOLID-STATE KINETICS OF LAAL11O18
ROPP, RC
CARROLL, B
[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1980, 63 (7-8) : 416 - 419
[17] SINTERING WITH RIGID INCLUSIONS - PAIR INTERACTIONS
SUNDARESAN, S
AKSAY, IA
[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1990, 73 (01) : 54 - 60
[18] Microwave processing: fundamentals and applications
Thostenson, ET
Chou, TW
[J]. COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING, 1999, 30 (09) : 1055 - 1071
[19] Tsukuma K., 1985, J AM CERAM SOC, V68, pC
[20] Effects of fine alumina dispersion on ionic conductivity and mechanical properties of ytterbia stabilized cubic zirconia
Wada, M
Sekino, T
Kusunose, T
Nakayama, T
Choa, YH
Niihara, K
[J]. MATERIALS RESEARCH INNOVATIONS, 2004, 8 (02) : 115 - 120

← 1 2 3 →