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Effect of cascade remnants on freely migrating defects in Cu-1% Au alloys

Abstract

The effects of cascade remnants on Freely Migrating Defects (FMD) were studied by measuring Radiation-Induced Segregation (RIS) in Cu-1%Au at 400degC during simultaneous irradiation with 1.5-MeV He and (400-800)-keV heavy ions (Ne, Ar or Cu). The large RIS observed during 1.5-MeV He-only irradiation was dramatically suppressed under simultaneous heavy ion irradiation. For Cu simultaneous irradiation, the suppression disappeared immediately after the Cu irradiation ceased, while for simultaneous inert gas (Ne or Ar) irradiation, the suppression persisted after the ion beam was turned off. These results demonstrate that the displacement cascades created by heavy ions introduce additional annihilation sites, which reduce the steady-state FMD concentrations. As the cascade remnants produced by Cu ions are thermally unstable at 400degC, the RIS suppression occurs only during simultaneous irradiation. On the other hand, the inert gas atoms which accumulate in the specimen apparently stabilize the cascade remnants, allowing the suppression to persist. (author)
Authors:
Iwase, A; Rehn, L E; Baldo, P M; Funk, L [1] 
  1. Argonne National Lab., IL (United States). Materials Science Div.
Publication Date:
Mar 01, 1997
Product Type:
Conference
Report Number:
JAERI-Conf-97-003; CONF-9603254-
Reference Number:
SCA: 360106; PA: JPN-97:010160; EDB-98:039017; SN: 98001890503
Resource Relation:
Journal Volume: 396; Conference: 7. international symposium on advanced nuclear energy research, Takasaki (Japan), 18-20 Mar 1996; Other Information: PBD: Mar 1997; Related Information: Is Part Of Recent progress in accelerator beam application. Proceedings of the 7th international symposium on advanced nuclear energy research; PB: 553 p.
Subject:
36 MATERIALS SCIENCE; COPPER BASE ALLOYS; GOLD ADDITIONS; CRYSTAL DEFECTS; MIGRATION; ATOM-ATOM COLLISIONS; ATOMIC DISPLACEMENTS; SEGREGATION; ION BEAMS; HEAVY IONS; TEMPERATURE RANGE 0400-1000 K
OSTI ID:
588420
Research Organizations:
Japan Atomic Energy Research Inst., Tokyo (Japan)
Country of Origin:
Japan
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 1946--4274; Other: ON: DE97764433; TRN: JP9710160
Availability:
OSTI as DE97764433
Submitting Site:
JPN
Size:
pp. 396-400
Announcement Date:

Citation Formats

Iwase, A, Rehn, L E, Baldo, P M, and Funk, L. Effect of cascade remnants on freely migrating defects in Cu-1% Au alloys. Japan: N. p., 1997. Web. doi:10.1557/PROC-396-179.
Iwase, A, Rehn, L E, Baldo, P M, & Funk, L. Effect of cascade remnants on freely migrating defects in Cu-1% Au alloys. Japan. doi:10.1557/PROC-396-179.
Iwase, A, Rehn, L E, Baldo, P M, and Funk, L. 1997. "Effect of cascade remnants on freely migrating defects in Cu-1% Au alloys." Japan. doi:10.1557/PROC-396-179. https://www.osti.gov/servlets/purl/10.1557/PROC-396-179.
@misc{etde_588420,
title = {Effect of cascade remnants on freely migrating defects in Cu-1% Au alloys}
author = {Iwase, A, Rehn, L E, Baldo, P M, and Funk, L}
abstractNote = {The effects of cascade remnants on Freely Migrating Defects (FMD) were studied by measuring Radiation-Induced Segregation (RIS) in Cu-1%Au at 400degC during simultaneous irradiation with 1.5-MeV He and (400-800)-keV heavy ions (Ne, Ar or Cu). The large RIS observed during 1.5-MeV He-only irradiation was dramatically suppressed under simultaneous heavy ion irradiation. For Cu simultaneous irradiation, the suppression disappeared immediately after the Cu irradiation ceased, while for simultaneous inert gas (Ne or Ar) irradiation, the suppression persisted after the ion beam was turned off. These results demonstrate that the displacement cascades created by heavy ions introduce additional annihilation sites, which reduce the steady-state FMD concentrations. As the cascade remnants produced by Cu ions are thermally unstable at 400degC, the RIS suppression occurs only during simultaneous irradiation. On the other hand, the inert gas atoms which accumulate in the specimen apparently stabilize the cascade remnants, allowing the suppression to persist. (author)}
doi = {10.1557/PROC-396-179}
volume = {396}
place = {Japan}
year = {1997}
month = {Mar}
}