Mechanism for recombination of radiation-induced point defects at interphase boundaries
- Los Alamos National Laboratory
- Univ. of Nebraska–Lincoln
- MIT
MD studies of collision cascades in KS-type Cu-Nb interfaces are performed, revealing that Cu interstitials are preferentially loaded into the interface while on the bcc Nb side there is very little absorption of interstitials. The interstitial loading effect at two types of heterogeneous Cu-Nb interfaces, both KS-type and SPD {l_brace}112{r_brace}-type interfaces is studied: (a) The Cu interstitials are observed to spontaneously emit from both types of interfaces to annihilate vacancies in the nearby bulk, (b) MD and NEB studies are used to characterize low barrier emission processes. Our study also indicates that interstitials do not lose their identity when absorbed even at interfaces where they become significantly delocalized.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE Laboratory Directed Research and Development (LDRD) Program
- DOE Contract Number:
- AC52-06NA25396
- OSTI ID:
- 1044106
- Report Number(s):
- LA-UR-12-22299; TRN: US201214%%309
- Resource Relation:
- Journal Volume: 85; Journal Issue: 1; Conference: COSIRES 2012 Computer Simulations of Radiation Effects in Solids ; 2012-06-24 - 2012-06-29 ; Santa Fe, New Mexico, United States
- Country of Publication:
- United States
- Language:
- English
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