| 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) | C5-227 - C5-232 | |
| DOI | https://doi.org/10.1051/jphyscol:1988524 | |
Interface Science and Engineering '87
An International Conference on the Structure and Properties of Internal Interfaces
J. Phys. Colloques 49 (1988) C5-227-C5-232
DOI: 10.1051/jphyscol:1988524
1 Department of Materials Science and Engineering, Cornell University, Ithaca, NY, U.S.A.
2 Ceramics Division, National Bureau of Standards, Gaithersburg, MD 20899, U.S.A.
An International Conference on the Structure and Properties of Internal Interfaces
J. Phys. Colloques 49 (1988) C5-227-C5-232
DOI: 10.1051/jphyscol:1988524
GRAIN BOUNDARY STRUCTURE IN Ni3Al
R.A.D. MacKENZIE1, M.D. VAUDIN1, 2 et S.L. SASS11 Department of Materials Science and Engineering, Cornell University, Ithaca, NY, U.S.A.
2 Ceramics Division, National Bureau of Standards, Gaithersburg, MD 20899, U.S.A.
Abstract
The influence of boron segregation and non-stoichiometry on grain boundary structure in Ni3Al was studied by transmission and scanning electron microscopy techniques. Small angle twist and tilt boundaries were produced by hot pressing misoriented single crystals of both doped and undoped material. Dislocation structures were observed in both bicrystal and polycrystal grain boundaries. In most cases the grain boundary dislocations were found to have the expected a<100> Burgers vector, however in one case dislocations with Burgers vector a/2<110> have been observed. Using a SEM diffraction technique the frequency of occurrence of grain boundary types was examined and found to be unchanged by the addition of boron.