| Numéro |
J. Phys. Colloques
Volume 49, Numéro C5, Octobre 1988
Interface Science and Engineering '87An International Conference on the Structure and Properties of Internal Interfaces |
|
|---|---|---|
| Page(s) | C5-441 - C5-446 | |
| DOI | https://doi.org/10.1051/jphyscol:1988553 | |
Interface Science and Engineering '87
An International Conference on the Structure and Properties of Internal Interfaces
J. Phys. Colloques 49 (1988) C5-441-C5-446
DOI: 10.1051/jphyscol:1988553
Department of Materials Science, University of Illinois at Urbana-Champaign, Urbana, IL-61801, U.S.A.
An International Conference on the Structure and Properties of Internal Interfaces
J. Phys. Colloques 49 (1988) C5-441-C5-446
DOI: 10.1051/jphyscol:1988553
UNUSUAL SEGREGATION BEHAVIOR OF BORON AND ITS EFFECT ON SEGREGATION OF SULFUR IN NICKEL
B. LADNA et H.K. BIRNBAUMDepartment of Materials Science, University of Illinois at Urbana-Champaign, Urbana, IL-61801, U.S.A.
Abstract
The co-segregation of B and S to the surface and grain boundaries of Ni was studied by SAES and SIMS. B showed an unusual segregation behavior wich resulted in the precipitation of Ni3B in the near surface layer and a continuous monolayer type B segregation at the grain boundary. The S segregation was not influenced by the presence of B and resulted in a uniform monolayer surface and grain boundary coverage. Analysis of hydrogen charged samples fractured in situ suggests that B segregated to the boundaries has a beneficial effect on their strength and also reduces the negative effect of S segregation.