Hostname: page-component-848d4c4894-nmvwc Total loading time: 0 Render date: 2024-06-26T12:30:35.183Z Has data issue: false hasContentIssue false
  • English
  • Français

Coherent orientation relationship among various quasicrystalline and crystalline phases in rapidly solidified Al78Mn20Ge2 alloy

Published online by Cambridge University Press:  29 June 2016

N. P. Lalla ,
R. S. Tiwari  and
O. N. Srivastava
N. P. Lalla
Affiliation:
Physics Department, Banaras Hindu University, Varanasi - 221 005, India
R. S. Tiwari
Affiliation:
Physics Department, Banaras Hindu University, Varanasi - 221 005, India
O. N. Srivastava
Affiliation:
Physics Department, Banaras Hindu University, Varanasi - 221 005, India
Get access

Abstract

Rapidly solidified Al78Mn20Ge2 alloy exhibits a curious structural feature; this corresponds to the simultaneous occurrence of almost all the quasicrystalline phases, e.g., primitive and face-centered icosahedral phase, rational approximant, and a new metastable cubic phase. The cubic crystalline phase shows yet another type of recently observed twin relation which effectively produces an icosahedral symmetry, a feature that has so far been specific to alloy systems Al–Mn–Si and Al–Mn–Fe–Si only. The diffraction evidences obtained in the present investigation reveal that the orientation of the structural subunit, which is a MacKay icosahedron, remains invariant across the various interphase boundaries. These results elucidate clearly the structural interrelationship among the various phases.

Type
Articles
Information
Journal of Materials Research , Volume 7 , Issue 1 , January 1992 , pp. 53 - 61
Copyright
Copyright © Materials Research Society 1992

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.Shechtmann, D., Blech, I., Gratias, D., and Cahn, J. W., Phys. Rev. Lett. 53, 1951 (1984).Google Scholar
2.Poon, S. J., Drehman, A. J., and Lawless, K. R., Phys. Rev. Lett. 55, 2324 (1985).Google Scholar
3.Chen, H. S. and Inoue, A., Scripta Metall. 21, 527 (1987).Google Scholar
4.Bendersky, L.A., Phys. Rev. Lett. 55, 1461 (1985).CrossRefGoogle Scholar
5.Chattopadhyay, K., Lele, S., Thangaraj, N., and Ranganathan, S., Acta Metall. 35, 727 (1987).Google Scholar
6.Tsai, A. P., Inoue, A., and Masumoto, T., Jpn. J. Appl. Phys. 26, L1505 (1987).Google Scholar
7.Ebalard, S. and Spaepen, F., J. Mater. Res. 4, 39 (1989).Google Scholar
8.Chattopadhyay, K. and Mukhopadhyay, N. K., Mater. Sci. Forum 22–24, 639 (1987).Google Scholar
9.Chen, C.H. and Chen, H.S., Phys. Rev. B 33, 2814 (1986).Google Scholar
10.Rokhsar, D. S., Mermin, N. D., and Wright, D. C., Phys. Rev. B 35, 5487 (1987).Google Scholar
11.Lalla, N. P., Tiwari, R. S., and Srivastava, O. N., Philos. Mag. B 63, 629 (1991).Google Scholar
12.Schaefer, R. J. and Bendersky, L. A., Scripta Metall. 20, 745 (1986).CrossRefGoogle Scholar
13.Koskenmaki, D. C., Chen, H. S., and Rao, K. V., Phys. Rev. B 33, 5326 (1986).Google Scholar
14.Bendersky, L. A., Cahn, J. W., and Gratias, D., Philos. Mag. B 60, 837 (1989).Google Scholar
15.Mukhopadhyay, N. K., Subbanna, G. N., Chattopadhyay, K., and Ranganathan, S., Proc. IV Asia-Pacific Conference on Electron Microscopy, Bangkok, 187 (1988).Google Scholar
16.Tsai, A. P., Inoue, A., Yokoyama, Y., and Masumoto, T., Philos. Mag. Lett. 61, 9 (1990).Google Scholar
17.Cooper, M. and Robinson, K., Acta Cryst. 20, 614 (1966).Google Scholar
18.Villars, P. and Calvert, L. D., Pearson's Handbook of Crystallographic Data for Intermetallic Phases (American Society for Metals, Metal Park, OH, 1985).Google Scholar
19.Li, F. H., Pan, G. Z., Tao, S. Z., Hui, M. J., Mai, Z. H., Chen, X. S., and Cai, L. Y., Philos. Mag. B 59, 535 (1989).Google Scholar
20.Fung, K. K. and Zhow, Y. Q., Philos. Mag. B 54, L27 (1986).Google Scholar
21.Mukhopadhya, N. K., Ishihara, K. N., Ranganathan, S., and Chattopadhyay, K., Acta Metall. (submitted, 1990).Google Scholar
22.Devaud-Rzepski, J., Quivy, A., Calvayrae, Y., Cornier-Quiquandon, M., and Gratias, D., Philos. Mag. B 60, 855 (1989).Google Scholar