TEM observations of the coexistence of perfect and dissociated dislocations in SiC under high stress

被引：14

作者：

Demenet, JL ^{[1
]}

Milhet, X ^{[1
]}

Rabier, J ^{[1
]}

机构：

[1] Univ Poitiers, CNRS, UMR 6630, Met Phys Lab, F-86962 Futuroscope, France

来源：

Physica Status Solidi C - Conferences and Critical Reviews, Vol 2, No 6 | 2005年 / 2卷 / 06期

关键词：

D O I：

10.1002/pssc.200460541

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

TEM observations of the microstructure of 4H-silicon carbide deformed at 150 degrees C under 5 GPa are reported which confirm the coexistence of perfect and dissociated dislocations under such conditions. It is argued that dislocations are nucleated as perfect dislocations in the shuffle set, then they cross-slip in the more stable glide set where they dissociate into partials.

引用

页码：1987 / 1991

页数：5

共 16 条

[1] Plastic deformation of minerals under extreme pressure using a multi-anvil apparatus [J].

Cordier, P ;

Rubie, DC .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2001, 309 :38-43

[2] Plastic behavior of 4H-SiC single crystals deformed at low strain rates [J].

Demenet, JL ;

Hong, MH ;

Pirouz, P .

SCRIPTA MATERIALIA, 2000, 43 (09) :865-870

[3] TEM observations of 4H-SiC deformed at room temperature and 150°C [J].

Demenet, JL ;

Milhet, X ;

Rabier, J ;

Cordier, P .

SILICON CARBIDE AND RELATED MATERIALS 2003, PRTS 1 AND 2, 2004, 457-460 :343-346

[4] Microstructures of 4H-SiC single crystals deformed under very high stresses [J].

Demenet, JL ;

Rabier, J ;

Milhet, X ;

Hong, MH ;

Pirouz, P ;

Stretton, I ;

Cordier, P .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2002, 14 (48) :12961-12966

[5] Dislocation motion in silicon: The shuffle-glide controversy [J].

Duesbery, MS ;

Joos, B .

PHILOSOPHICAL MAGAZINE LETTERS, 1996, 74 (04) :253-258

[6] Stacking fault energy of 6H-SiC and 4H-SiC single crystals [J].

Hong, MH ;

Samant, AV ;

Pirouz, P .

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 2000, 80 (04) :919-935

[7]

Pirouz P, 2004, SOLID MECH APPL, V115, P139

[8]

Pirouz P., 2001, PHILOS MAG A, V85, P1027

[9] Stability and core structure of undissociated screw dislocations in group IV materials investigated by means of atomistic calculations [J].

Pizzagalli, L ;

Beauchamp, P ;

Rabier, J .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2002, 14 (48) :12681-12688

[10] Plastic deformation of Si at low temperature under high confining pressure [J].

Rabier, J ;

Cordier, P ;

Demenet, JL ;

Garem, H .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2001, 309 (309-310) :74-77

← 1 2 →