Freely-migrating-defect production during irradiation at elevated temperatures

Journal Article · Thu Dec 15 04:00:00 EST 1988 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.38.12868· OSTI ID:6604701

Hashimoto, T; Rehn, L E; Okamoto, P R

Radiation-induced segregation in a Cu--1 at. % Au alloy was investigated using in situ Rutherford backscattering spectrometry. The amount of Au atom depletion in the near surface region was measured as a function of dose during irradiation at 350 /sup 0/C with four ions of substantially different masses. Relative efficiencies for producing freely migrating defects were evaluated for 1.8-MeV /sup 1/H, /sup 4/He, /sup 20/Ne, and /sup 84/Kr ions by determining beam current densities that gave similar radiation-induced segregation rates. Irradiations with primary knock-on atom median energies of 1.7, 13, and 79 keV yielded relative efficiencies of 53, 7, and 6 %, respectively, compared to the irradiation with a 0.83-keV median energy. Despite quite different defect and host alloy properties, the relative efficiencies for producing freely migrating defects determined in Cu-Au are remarkably similar to those found previously in Ni-Si alloys. Hence, the reported efficiencies appear to offer a reliable basis for making quantitative correlations of microstructural changes induced in different alloy systems by a wide variety of irradiation particles.

• Research Organization: Energy Research Laboratory, Hitachi Ltd., 1168 Moriyamacho, Hitachi, Ibaraki 316, Japan
• OSTI ID: 6604701
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 38:18; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360106* -- Metals & Alloys-- Radiation Effects
ALLOY SYSTEMS
ALLOYS
BINARY ALLOY SYSTEMS
CATIONS
CHARGED PARTICLES
COLLISIONS
COPPER ALLOYS
COPPER BASE ALLOYS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
ELASTIC SCATTERING
ENERGY RANGE
GOLD ALLOYS
HELIUM IONS
HIGH TEMPERATURE
HYDROGEN IONS
HYDROGEN IONS 1 PLUS
ION COLLISIONS
IONS
KRYPTON IONS
MEV RANGE
MEV RANGE 01-10
MICROSTRUCTURE
NEON IONS
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
RUTHERFORD SCATTERING
SCATTERING