Direct calorimetric measurement of grain boundary and surface enthalpies in yttria-stabilized zirconia

被引：21

作者：

Chen, Shushu ^{[1
,2
]}

Avila-Paredes, Hugo J. ^{[3
]}

Kim, Sangtae ^{[2
,3
]}

Zhao, Jinfeng ^{[3
]}

Munir, Zuhair A. ^{[3
]}

Navrotsky, Alexandra ^{[1
,2
,3
]}

机构：

[1] Univ Calif Davis, Peter A Rock Thermochem Lab, Davis, CA 95616 USA

[2] Univ Calif Davis, NEAT ORU, Davis, CA 95616 USA

[3] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2009年 / 11卷 / 17期

关键词：

SOLUTE SEGREGATION; ENERGETICS; ENERGY;

D O I：

10.1039/b819740g

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We measured the change in enthalpy with grain size of a dense nanograined yttria-stabilized zirconia by oxide melt solution calorimetry and derived a grain boundary enthalpy, 0.73 +/- 0.19 J m(-2). Surface enthalpies of nanopowders are 2.21 +/- 0.14 J m(-2) (anhydrous surface) and 1.60 +/- 0.09 J m(-2) (hydrous surface). The grain boundary enthalpy is about a factor of two smaller than the enthalpy of the anhydrous surface, suggesting that densification which maintains nanosized grains is indeed thermodynamically driven. This is the first direct calorimetric measurement of grain boundary enthalpy in a ceramic.

引用

页码：3039 / 3042

页数：4

共 18 条

[1] Enhanced low-temperature protonic conductivity in fully dense nanometric cubic zirconia
Anselmi-Tamburini, Umberto
Maglia, Filippo
Chiodelli, Gaetano
Riello, Pietro
Bucella, Stefania
Munir, Zuhair A.
[J]. APPLIED PHYSICS LETTERS, 2006, 89 (16)
[2] STABILIZATION OF TETRAGONAL STRUCTURE IN ZIRCONIA MICROCRYSTALS
GARVIE, RC
[J]. JOURNAL OF PHYSICAL CHEMISTRY, 1978, 82 (02) : 218 - 224
[3] Grain boundary blocking effect in zirconia: A Schottky barrier analysis
Guo, X
Maier, J
[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2001, 148 (03) : E121 - E126
[4] Haberko K., 1975, CERAMURGIA INT, V1, P111
[5] KILNER JA, 1981, NONSTOICHIOMETRIC OX, P254
[6] Enthalpy of formation of cubic yttria-stabilized zirconia
Lee, TA
Navrotsky, A
Molodetsky, I
[J]. JOURNAL OF MATERIALS RESEARCH, 2003, 18 (04) : 908 - 918
[7] Ab initio calculations of pristine and doped zirconia Σ5 (310)/[001] tilt grain boundaries
Mao, ZG
Sinnott, SB
Dickey, EC
[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2002, 85 (06) : 1594 - 1600
[8] The energetics of cubic zirconia from solution calorimetry of yttria- and calcia-stabilized zirconia
Molodetsky, I
Navrotsky, A
[J]. ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS, 1998, 207 : 59 - 65
[9] Progress and new directions in high temperature calorimetry revisited
Navrotsky, A
[J]. PHYSICS AND CHEMISTRY OF MINERALS, 1997, 24 (03) : 222 - 241
[10] Energy crossovers in nanocrystalline zirconia
Pitcher, MW
Ushakov, SV
Navrotsky, A
Woodfield, BF
Li, GS
Boerio-Goates, J
Tissue, BM
[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2005, 88 (01) : 160 - 167

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