Mechanisms of defect production and atomic mixing in high energy displacement cascades: A molecular dynamics study

Conference · Wed Jun 05 00:00:00 EDT 1991

OSTI ID:5363162

Guinan, M W

We have performed molecular dynamics computer simulation studies of displacement cascades in Cu at low temperature. For 25 keV recoils we observe the splitting of a cascade into subcascades and show that cascades in Cu may lead to the formation of vacancy and interstitial dislocation loops. We discuss a new mechanism of defect production based on the observation of interstitial prismatic dislocation loop punching from cascades at 10 K. We also show that below the subcascade threshold, atomic mixing in the cascade is recoil-energy dependent and obtain a mixing efficiency that scales as the square root of the primary recoil energy. 44 refs., 12 figs.

• Research Organization: Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5363162
• Report Number(s): UCRL-JC-107488; CONF-9105130-6; ON: DE91017082
• Resource Relation: Conference: International conference on physics of irradiation effects in metals, Siofok (Hungary), 20-24 May 1991
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COPPER
PHYSICAL RADIATION EFFECTS
COMPUTERIZED SIMULATION
CRYSTAL STRUCTURE
DEFECTS
DISLOCATIONS
DYNAMICS
INTERSTITIALS
MOLECULES
TEMPERATURE DISTRIBUTION
X-RAY DIFFRACTION
COHERENT SCATTERING
CRYSTAL DEFECTS
DIFFRACTION
ELEMENTS
LINE DEFECTS
MECHANICS
METALS
POINT DEFECTS
RADIATION EFFECTS
SCATTERING
SIMULATION
TRANSITION ELEMENTS
360106* - Metals & Alloys- Radiation Effects
656002 - Condensed Matter Physics- General Techniques in Condensed Matter- (1987-)