X-ray elastic constants for α-Al2O3

被引：48

作者：

Hovis, DB ^{[1
]}

Reddy, A ^{[1
]}

Heuer, AH ^{[1
]}

机构：

[1] Case Western Reserve Univ, Dept Mat Sci & Engn, Cleveland, OH 44106 USA

来源：

APPLIED PHYSICS LETTERS | 2006年 / 88卷 / 13期

关键词：

D O I：

10.1063/1.2189071

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

It has recently been discovered that there is a long-standing error in the sign of c(14) for alpha-Al2O3-it is +22 rather than -22 GPa. Although c(14) is the smallest of the six elastic constants of alpha-Al2O3 (space group R (3) over barc), it has a significant effect on the Reuss x-ray elastic constants, particularly for the {02 (2) over bar4} reflection. Measurements using the Advanced Photon Source have confirmed that the sign of c(14) must be positive. Use of the wrong sign of c(14) can induce errors in excess of 30% in the measured residual stresses of alpha-Al2O3 scales. (c) 2006 American Institute of Physics.

引用

页数：3

共 16 条

[1]

BOLLENRATH F, 1967, Z METALLKD, V58, P76

[2]

BRINKSMEIER E, 1988, P 2 INT C RES STRESS, P335

[3]

BUERGER MH, 1952, INT TABLES CRYSTALLO, V1

[4] Diffraction elastic constants of a cubic polycrystal [J].

DeWit, R .

JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1997, 30 (04) :510-511

[5]

EVENSCHOR PD, 1971, Z METALLKD, V62, P38

[6] Reconciliation of ab initio theory and experimental elastic properties of Al2O3 [J].

Gladden, JR ;

So, JH ;

Maynard, JD ;

Saxe, PW ;

Le Page, Y .

APPLIED PHYSICS LETTERS, 2004, 85 (03) :392-394

[7]

HEUER AH, IN PRESS SER MAT

[8] THE ELASTIC BEHAVIOUR OF A CRYSTALLINE AGGREGATE [J].

HILL, R .

PROCEEDINGS OF THE PHYSICAL SOCIETY OF LONDON SECTION A, 1952, 65 (389) :349-355

[9] BERECHNUNG DER ELASTISCHEN KONSTANTEN DES VIELKRISTALLS AUS DEN KONSTANTEN DES EINKRISTALLS [J].

KRONER, E .

ZEITSCHRIFT FUR PHYSIK, 1958, 151 (04) :504-518

[10]

Kroner E, 1986, Modelling small deformations of polycrystals, P229

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