Plastic Deformation of ⟨001⟩ Single-Crystal SrTiO3 by Compression at Room Temperature

被引:32
作者
Yang, Kai-Hsun [1 ]
Ho, New-Jin [1 ]
Lu, Hong-Yang [1 ]
机构
[1] Natl Sun Yat Sen Univ, Dept Mat Sci, Ctr NanoSci & Technol, Kaohsiung 80424, Taiwan
关键词
SAPPHIRE ALPHA-AL2O3; STRONTIUM-TITANATE; DISLOCATIONS; FLOW; RELAXATION; BEHAVIOR; GLIDE; SLIP; FCC;
D O I
10.1111/j.1551-2916.2011.04473.x
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 plastic deformation of (001) single-crystal SrTiO3 is investigated using compression along [001] at room temperature. A total plastic strain of similar to 19%+/- 2% is consistently obtained. The stress-strain curve exhibiting four work-hardening stages are describable using the stage 0 of axis rotation, the stage I "easy glide," the stage II multiple slip and the wall-and-cell structure, and the stage III work softening and dynamic recovery before sample fracture takes place. It is revealed by analyzing the microstructure for each work-hardening stage that the plastic deformation of single-crystal SrTiO3 closely resembles that of metals. The primary slip systems of [011] (0 (1) over bar1) and [01 (1) over bar] (011) predominate in stage I where plastic deformation occurs by the migration of kink pairs in collinear partial dislocations. The activation of multiple slips including [101] ((1) over bar 01) and [10 (1) over bar] (101), and [011] (0 (1) over bar1) and [0 (1) over bar1] (011) in stage II produces the cell-and-wall structure which is also characteristic of plastically deformed metals. In stage III with decreasing work-hardening rate, the bow-out dislocation interaction from opposite walls results in annihilation. The reaction between dislocations from adjacent walls produces the resultant dislocations with b = [(1) over bar 10] parallel to the load axis [001]. These dislocations are sessile, which eventually leads to sample fracture.
引用
收藏
页码:3104 / 3111
页数:8
相关论文
共 41 条
[1]   ON THE STRESS DEPENDENCE OF THE DISLOCATION VELOCITY IN SILICON [J].
ALEXANDER, H ;
KISIELOWSKIKEMMERICH, C ;
SWALSKI, AT .
PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 1987, 104 (01) :183-192
[2]   A NEW MECHANISM OF WORK-HARDENING IN THE LATE STAGES OF LARGE-STRAIN PLASTIC-FLOW IN FCC AND DIAMOND CUBIC-CRYSTALS [J].
ARGON, AS ;
HAASEN, P .
ACTA METALLURGICA ET MATERIALIA, 1993, 41 (11) :3289-3306
[3]   DEFORMATION OF PLASTICALLY NON-HOMOGENEOUS MATERIALS [J].
ASHBY, MF .
PHILOSOPHICAL MAGAZINE, 1970, 21 (170) :399-&
[4]   Mechanical behaviour of ferroelectric films on perovskite substrate [J].
Bernard, O ;
Andrieux, M ;
Poissonnet, S ;
Huntz, AM .
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2004, 24 (05) :763-773
[5]   Surprising results of a study on the plasticity in strontium titanate [J].
Brunner, D ;
Taeri-Baghbadrani, S ;
Sigle, W ;
Rühle, M .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2001, 84 (05) :1161-1163
[6]   Low-temperature plasticity and flow-stress behaviour of strontium titanate single crystals [J].
Brunner, Dieter .
ACTA MATERIALIA, 2006, 54 (19) :4999-5011
[7]   Deformation of sapphire (α-Al2O3) by basal slip and basal twinning below 700° C [J].
Castaing, J ;
He, A ;
Lagerlöf, KPD ;
Heuer, AH .
PHILOSOPHICAL MAGAZINE, 2004, 84 (11) :1113-1125
[8]   PLASTIC DEFORMATION OF ALKALI HALIDE CRYSTALS AT HIGH PRESSURE - WORK-HARDENING EFFECTS [J].
DAVIS, LA ;
GORDON, RB .
JOURNAL OF APPLIED PHYSICS, 1969, 40 (11) :4507-&
[9]   WORK SOFTENING IN STOICHIOMETRIC SPINEL (MGAL2O4) [J].
DONLON, WT ;
MITCHELL, TE ;
HEUER, AH .
PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1982, 45 (06) :1013-1036
[10]   ANNIHILATION OF DISLOCATIONS DURING TENSILE AND CYCLIC DEFORMATION AND LIMITS OF DISLOCATION DENSITIES [J].
ESSMANN, U ;
MUGHRABI, H .
PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1979, 40 (06) :731-756