Hostname: page-component-848d4c4894-pftt2 Total loading time: 0 Render date: 2024-05-26T18:40:00.916Z Has data issue: false hasContentIssue false

The Microchemistry Studies of Ductile Ll2 Ni-Based Intermetallics

Published online by Cambridge University Press:  22 February 2011

Naoya Masahashi*
University of Cambridge, Department of Materials Science & Metallurgy Pembroke Street, Cambridge, CB2 3QZ, U.K.
Get access


Auger electron microscopy (AES) analysis of boron doped Ni3Al have shown boron segregation at grain boundary (GB). Boron segregation was enhanced with increasing bulk boron content independent of stoichiometry, suggesting that hypo-stoichiometric alloy is intrinsically ductile even without boron. A slight Ni cosegregation is confirmed using atom probe field ion microscope (APFIM). In Ni3(Si,Ti), no distinct composition fluctuation was identified between matrix and GB vicinity. These results suggest that atomic bonding atmosphere modification from covalent to metallic in the vicinity of GB is one of factors to modify ductility for Ll2-type intermetallics.

Research Article
Copyright © Materials Research Society 1995

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.)


1. Aoki, K. and Izumi, O., JJpn.Inst.Met., 43, 1190 (1979)Google Scholar
2. Williams, K. J., J. of Inst. Metals, 97, 112 (1969)Google Scholar
3. Takasugi, T., Izumi, O., J of Materials Science, 26, 1173 (1991)Google Scholar
4. Baker, I., Schulson, E.M. and Michael, J.R., Phil.Mag.B, 57, 379 (1988)Google Scholar
5. Taub, A.I. and Biant, C.L., Acta metall., 35, 1597 (1987)Google Scholar
6. Takasugi, T., Izumi, O. and Masahashi, N., Acta metall., 33, 1259 (1985)Google Scholar
7. Waugh, A.R., Richardson, C.H. and Jenkins, R., Surface Science 266, 501 (1992)Google Scholar
8. Takasugi, T., George, E.P., Pope, D.P. and Izumi, O., Scr.Met., 19, 551 (1985)Google Scholar
9. Ogura, T., Hanada, S., Masumoto, T. and Izumi, O., Met Trans.A,16A, 441 (1985)Google Scholar
10. Davis, L.E. and Joshi, A., in Surface Analysis Technique for Metallurgical Application edited by Carbonara, R.S. and Cutthill, J.R. (ASTM Special Technical Publication 596,1975) p.52 Google Scholar
11. Handbook of Auger Electron Spectroscopy, edited by Davis, L.E., MacDonald, N.C., Palmberg, P.W., Liach, G.E. and Weber, R.E. (Physical Electronic Division, Perkin-Elmer Corporation) p. 11 Google Scholar
12. Sieloff, D.D., Brenner, S.S. and Burke, M.G. in High Temperature Ordered Intermetallic Alloys II edited by Stoloff, N.S., Koch, C.C., Liu, C.T. and Izumi, O. (Mater.Res.Soc.Proc.81, Pittsburgh, PA, 1987) pp.8797 Google Scholar
13. Liu, C.T., White, C.L. and Horton, J.A., Acta metall., 33, 213 (1985)Google Scholar
14. Taub, A.I. and Briant, C.L., in High Temperature Ordered Intermetallic Alloys II edited by Stoloff, N.S., Koch, C.C., Liu, C.T. and Izumi, O. (Mater.Res.Soc.Proc.81, Pittsburgh, PA, 1987) pp.343353 Google Scholar
15. George, E.P., Liu, C.T. and Pope, D.P., Scripta metall., 28,857 (1990)Google Scholar
16. Sieloff, D.N., Brenner, S.S. and Ming-Jian, Hua in High Temperature Ordered Intermetallic Alloys III edited by Liu, C.T., Taub, A.I., Stoloff, N.S. and Koch, C.C. (Mater.Res.Soc.Proc.133, Pittsburgh, PA, 1989) pp. 155160 Google Scholar
17. Brenner, S.S. and Ming-Jian, H., Scripta metall., 24, 671 (1990)Google Scholar
18. Schulson, E.M., Bragg, L.J. and Baker, I., Acta metall., 38, 203 (1990)Google Scholar
19. Oliver, W.C. and White, C.L. in High Temperature Ordered Intermetallic Allovs II edited by Stoloff, N.S., Koch, C.C., Liu, C.T. and Izumi, O. (Mater.Res.Soc.Proc.81, Pittsburgh, PA, (1987) pp.241246 Google Scholar
20. Masahashi, N., Takasugi, T. and Izumi, O., Acta metall., 36, 1815 (1988)Google Scholar