Hostname: page-component-5c6d5d7d68-xq9c7 Total loading time: 0 Render date: 2024-08-07T23:17:14.218Z Has data issue: false hasContentIssue false
  • English
  • Français

Chemistry, Bonding and Fracture of Grain Boundaries in Ni3Si

Published online by Cambridge University Press:  15 February 2011

Shanthi Subramanian ,
David A. Muller ,
John Silcox  and
Stephen. L. Sass
Shanthi Subramanian
Affiliation:
Department of Materials Science and Engineering, Cornell University, Ithaca, NY. 14853
David A. Muller
Affiliation:
Department of Applied and Engineering Physics, Cornell University, Ithaca, NY. 14853
John Silcox
Affiliation:
Department of Applied and Engineering Physics, Cornell University, Ithaca, NY. 14853
Stephen. L. Sass
Affiliation:
Department of Materials Science and Engineering, Cornell University, Ithaca, NY. 14853
Get access

Abstract

To obtain insight into the effect of dopants on the bonding and cohesive energy of gram boundaries in Ll2 intermetallic compounds, the chemistry and electronic structure at grain boundaries in B-free and B-doped Ni-23 at % Si alloys were examined, with electron energy loss spectroscopy (EELS) providing information on the former and energy dispersive X-ray spectroscopy (EDX) on the latter. Ni-enrichment was seen at large angle boundaries, both in the absence and presence of B. EELS of the Ni L3 edge showed that the bonding at Ni-rich grain boundaries was similar in both undoped and doped alloys. Comparison of the Ni L3 edge recorded at the grain boundary and in the bulk suggests that reduced hybridization and weaker bonding occurs at Ni-rich grain boundaries in both doped and undoped alloys. These changes in bonding are interpreted in terms of changes in the cohesive energy of the boundaries.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 460: Symposium Z – High-Temperature Ordered Intermetallic Alloys VII , 1996 , 647
Copyright
Copyright © Materials Research Society 1997

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Muller, D.A., Subramanian, S., Batson, P.E., Sass, S.L. and Silcox, J., Acta Metall. 44, 1637 (1996)Google Scholar
2. Subramanian, S., Muller, D. A., Sass, S. L. and Silcox, J., Acta Metali. 44, 1647 (1996)Google Scholar
3. Muller, D. A., Subramanian, S., Batson, P. E., Sass, S. L., Silcox, J., Phys. Rev. Lett. 75, 4744 (1995)Google Scholar
4. Liu, C. T., White, C. L. and Horton, J. A., Acta Metali. 33, 1585 (1985)Google Scholar
5. Liu, C. T. in Structural Intermetallics- Proceedings (eds. Darolia, R. et al) T.M.S. Warrendale, PA, 356 (1993)Google Scholar
6. Oliver, W.C. and White, C. L., in High Temperature Ordered Intermetallics. MRS Symposium 81, Materials Research Society, Pittsburgh, PA, 241 (1986)Google Scholar
7. Taub, A.I. and Briant, C. L., Met. Trans. A 20A, 2025 (1989)Google Scholar
8. Schulson, E.M., Briggs, L. J. and Baker, I., Acta Metall. 38, 207 (1990)Google Scholar
9. Liu, C. T. and Oliver, W.C., Scripta Metall. 25, 1933 (1991)Google Scholar
10. Liu, C.T., George, E. P. and Oliver, W. C., J. Intermetallics 4, 77 (1996)Google Scholar
11. Tomboulian, D.H., and Bedo, D. E., Phys. Rev. 104, 590 (1956)Google Scholar
12. Collex, C. and Jouffrey, B., Phil. Mag. 25, 511 (1972)Google Scholar
13. Brown, M., Peierls, R. E. and Stern, E. A., Phys. Rev. B 15, 738 (1977)Google Scholar
14. Matheiss, L.F. and Dietz, R. E., Phys. Rev. B 22, 1663 (1980)Google Scholar
15. Bisi, O. and Calandra, C., J. Phys C 14, 5479 (1981)Google Scholar
16. del Pennino, U., Mariani, C., Valeri, S., Ottaviani, G., Betti, M. G., Nannarone, S. and De Crescenzi, M., Phys. Rev B 34, 2875 (1986)Google Scholar
17. Betti, M. G., del Pennino, U., Mariani, C., Fiorello, A. M., Pedio, M., Perugini, S. and Nannarone, S., Physica Scripta 36, 153 (1987)Google Scholar
18. Leapman, R. D., Rez, P. and Mayers, D.F., J. Chem. Phys. 72, 1232 (1980)Google Scholar
19. Muller, D.A., Ph.D. Thesis, Cornell University, Ithaca, NY (1996), to be submitted to Phys. Rev. B).Google Scholar
20. Baker, I., Yuan, J. and Schulson, E. M., Metallurgical Trans. A. 24A, 283 (1993) 21.Google Scholar
11. Grunthaner, P. J., Grunthaner, F. G. and Madhukar, A., J. Vac. Sci and Tech. 20, 680 (1982)Google Scholar
22. Baker, I., Padgett, R. A. and Schulson, E. M., Scripta Metall. 23, 1969 (1989)Google Scholar
23. Chen, S. P., Voter, A. F., Albers, R. C, Boring, A. M. and Hay, P. J., J. Mater. Res., 5, 955 (1990)Google Scholar