Effects of collision cascades on recombination and clustering of point defects

Conference · Tue May 01 04:00:00 EDT 1990

OSTI ID:6999628

Woo, C H ^[1]; Singh, B N ^[2]; Heinisch, H ^[3]

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1. Atomic Energy of Canada Ltd., Pinawa, MB (Canada)
2. Risoe National Lab., Roskilde (Denmark). Metallurgy Dept.
3. Pacific Northwest Lab., Richland, WA (USA)

In order to understand the radiation effects under cascade damage conditions where vacancies and interstitials are created in a localized and segregated fashion, a programme has been initiated to model the evolution of point defect microstructure between cascades and among subcascades. The model and some preliminary results are presented of analytical and numerical calculations of the space and time dependent diffusion and clustering of self-interstitial atoms. The calculation includes the effect of back diffusion of self- interstitial atoms to the vacancy-rich cascade core. It is concluded that a diffusion-rate theory model of the point defect evolution in cascade zones appears to be feasible. 7 refs., 3 figs.

• Research Organization: Pacific Northwest Lab., Richland, WA (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 6999628
• Report Number(s): PNL-SA-18233; CONF-891204--35; ON: DE90011932
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700209* -- Fusion Power Plant Technology-- Component Development & Materials Testing
COLLISIONS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DIFFUSION
MATERIALS
MICROSTRUCTURE
PHYSICAL RADIATION EFFECTS
POINT DEFECTS
RADIATION EFFECTS
RECOMBINATION
SPACE-TIME
SWELLING
THERMONUCLEAR REACTOR MATERIALS