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Title: Bismuth segregation at copper grain boundaries

Abstract

The dependence of Bi segregation on the grain-boundary (GB) geometry for various Bi concentrations in Cu at different temperatures is investigated systematically. The GB segregation of Bi in Cu(Bi) bicrystals was determined quantitatively using energy dispersive X-ray spectroscopy (EDS) in a dedicated scanning transmission electron microscope (STEM). The Miller indices of the corresponding GB planes were determined by high resolution transmission electron microscopy (HRTEM). The energies of all experimentally investigated GBs were calculated by atomistic computer simulations. Gibbs segregation free energies were determined from the experimentally measured amount of Bi segregation using the classical McLean segregation theory. The free energies decrease monotonically with increasing calculated GB energies. The Fowler-Guggenheim segregation theory yields an attractive interaction between the segregated Bi atoms. No Bi-induced changes in the bonding at the GBs could be detected by electron energy loss spectroscopy (EELS).

Authors:
; ;
Publication Date:
Research Org.:
Max-Planck-Inst. fuer Metallforschung, Stuttgart (DE)
OSTI Identifier:
20005382
Resource Type:
Journal Article
Journal Name:
Acta Materialia
Additional Journal Information:
Journal Volume: 47; Journal Issue: 15-16; Conference: Materials Science and Mechanics of Interfaces, La Jolla, CA (US), 10/25/1998--10/30/1998; Other Information: PBD: 12 Nov 1999; Journal ID: ISSN 1359-6454
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; GRAIN BOUNDARIES; COPPER; BISMUTH ADDITIONS; SEGREGATION; TEMPERATURE DEPENDENCE; SPECTROSCOPY; MICROSCOPY; THERMODYNAMICS; COMPUTERIZED SIMULATION

Citation Formats

Alber, U, Muellejans, H, and Ruehle, M. Bismuth segregation at copper grain boundaries. United States: N. p., 1999. Web. doi:10.1016/S1359-6454(99)00265-7.
Alber, U, Muellejans, H, & Ruehle, M. Bismuth segregation at copper grain boundaries. United States. doi:10.1016/S1359-6454(99)00265-7.
Alber, U, Muellejans, H, and Ruehle, M. Fri . "Bismuth segregation at copper grain boundaries". United States. doi:10.1016/S1359-6454(99)00265-7.
@article{osti_20005382,
title = {Bismuth segregation at copper grain boundaries},
author = {Alber, U and Muellejans, H and Ruehle, M},
abstractNote = {The dependence of Bi segregation on the grain-boundary (GB) geometry for various Bi concentrations in Cu at different temperatures is investigated systematically. The GB segregation of Bi in Cu(Bi) bicrystals was determined quantitatively using energy dispersive X-ray spectroscopy (EDS) in a dedicated scanning transmission electron microscope (STEM). The Miller indices of the corresponding GB planes were determined by high resolution transmission electron microscopy (HRTEM). The energies of all experimentally investigated GBs were calculated by atomistic computer simulations. Gibbs segregation free energies were determined from the experimentally measured amount of Bi segregation using the classical McLean segregation theory. The free energies decrease monotonically with increasing calculated GB energies. The Fowler-Guggenheim segregation theory yields an attractive interaction between the segregated Bi atoms. No Bi-induced changes in the bonding at the GBs could be detected by electron energy loss spectroscopy (EELS).},
doi = {10.1016/S1359-6454(99)00265-7},
journal = {Acta Materialia},
issn = {1359-6454},
number = 15-16,
volume = 47,
place = {United States},
year = {1999},
month = {11}
}