Hostname: page-component-cd9895bd7-dk4vv Total loading time: 0 Render date: 2024-12-25T02:55:57.979Z Has data issue: false hasContentIssue false
  • English
  • Français

X-Ray Diffraction Study of Ordering in Two Sigma Phases

Published online by Cambridge University Press:  06 March 2019

R. W. Spor ,
H. Claus  and
Paul A. Beck
R. W. Spor
Affiliation:
University of Illinois Urbana, Illinois
H. Claus
Affiliation:
University of Illinois Urbana, Illinois
Paul A. Beck
Affiliation:
University of Illinois Urbana, Illinois
Get access

Abstract

X-ray powder pattern line intensities were measured for the (Cr, Re)σ and (Re, Fe)σ phases by a step-scanning diffractometer, using CrKα radiation, scintillation counter, and a pulse height analyzer. The measured intensity ratios for all available pairs of adjacent lines were compared by means of a computer with the corresponding calculated intensity ratios based on approximately 1800 different ordering schemes for each alloy. The results showed ordering in both alloys, and indicated that the ordering was based on atomic size. These results are different from those obtained previously by Kasper and Waterstrat (no ordering), and by Ageyev et al. [In (Cr, Re)σ the Cr atoms are preferentially in large coordination number positions.]

Type
Research Article
Information
Advances in X-Ray Analysis , Volume 10: Fifteenth Annual Conference on Applications of X-ray Analysis, August 10-12, 1966 , 1966 , pp. 213 - 220
Copyright
Copyright © International Centre for Diffraction Data 1966

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

1. Hall, E. O. and Algie, S. H., “The Sigma Phase,” Met. Rev. 11: 61, 1966.Google Scholar
2. Sully, A. H. and Heal, T. J., “An Electron Compound in Alloys of the Transition Metals,” Research 1: 288, 1948.Google Scholar
3. Sully, A. H., “The Sigma Phase in Binary Alloys of the Transition Elements,” J. Inst. Metals 80: 173, 1951.Google Scholar
4. Rideout, S. P., Manly, W. D., Kamen, E. L., Lement, B. S., and Beck, P. A., “Intermediate Phases in Ternary Alloy Systems of Transition Elements,” Trans. AIME 191: 872–876, 1951.Google Scholar
5. Bloom, D. A. and Grant, N. J., “Regarding Sigma Phase Formation,” Trans. AIME 197: 88, 1953.Google Scholar
6. Greenfield, P. and Beck, P. A., “The Sigma Phase in Binary Alloys,” Trans. AIME 200: 253–257, 1954.Google Scholar
7. Greenfield, P. and Beck, P. A., “Intermediate Phases in Binary Systems of Certain Transition Elements,” Trans. AIME 206: 265, 1956.Google Scholar
8. Shoemaker, D. P. and Bergman, B. G., “The Crystal Structure of a Sigma Phase, FeCr,” J. Am. Chem. Soc. 72: 5793, 1950.Google Scholar
9. Dickens, G. J., Douglas, A. M., and Taylor, W. H., “Structure of the Sigraa-Phase in the Iron-Chromium and Cobalt-Chromium Systems,” Nature 167: 192, 1951.Google Scholar
10. Kasper, J. S., Decker, B. F., and Bélanger, J. R., “The Crystal Structure of the Sigma-Phase in the Co-Cr System,” J. Appl. Phys. 11: 361, 1951.Google Scholar
11. Kasper, J. D., “Atomicand Magnetic Ordering in Transition Metal Structures,” in: P. A. Beck (ed.), Theory of Alloy Phases, American Society for Metals, Cleveland, Ohio, 1956, p. 264.Google Scholar
12. Decker, B. F., Waterstrat, R. M., and Kasper, J. S., “Formation of Sigma Phase in the Mn-Mo System,” Trans. AIME 197: 1476, 1953.Google Scholar
13. Bergman, G. and Shoemaker, D. P., “The Determination of the Crystal Structure of the Sigma Phase in the Iron-Chromium and Iron-Molybdenum Systems,” Acta Cryst. 7: 857, 1954.Google Scholar
14. Dickens, G. J., Douglas, A. M. B., and Taylor, W. H., “The Crystal Structure of the Co-Cr Sigma Phase,” Acta Cryst. 9: 297, 1956.Google Scholar
15. Kasper, J. D. and Waterstrat, R. M., “Ordering of Atoms in the Sigma Phase,” Acta Cryst. 9: 289, 1956.Google Scholar
16. Wilson, C. G. and Spooner, F. J., “Ordering of Atoms in the Sigma Phase FeMo,” Acta Cryst. 16: 230, 1963.Google Scholar
17. Forsyth, J. B. and Da Veiga, L. M. D'Alte, “The Structure of the Sigma Phase Co2Mo3,” Acta Cryst. 16: 509, 1963.Google Scholar
18. Wilson, C. G., “Order in Binary Sigma Phases,” Acta Cryst. 16: 724, 1963.Google Scholar
19. Spooner, F. J. and Wilson, C. G., “Ordering in Binary Sigma Phase,” Acta Cryst. 17: 1533, 1964.Google Scholar
20. Algie, S. H. and Hall, E. O., “Site Ordering in Some Sigma Phase Structures,” Acta Cryst. 20: 142, 1966.Google Scholar
21. Waterstrat, R. M. and Kasper, J. S., “X-Ray Diffraction Study of the Sigma Phase in the Systems Re-Cr, Ru-Cr, and Os-Cr,” Trans. AIME 209: 872, 1957.Google Scholar
22. Ageev, N. V. and Shekhtman, V. Sh., “The Crystal Chemistry of the Compounds of Rhenium with Transition Metals,” in: B. W. Gonser (éd.), Rhenium, Elsevier Publishing Co., New York, 1962, p. 45.Google Scholar
23. Ageev, N. V. and Shekhtman, V. Sh., “On the Question of the Nature of the Sigma Phase,” Dokl. Akad. Nauk SSSR 135: 309, 1960.Google Scholar
24. Beck, P. A., “Certain Intermediate Phases in Alloys of the Transition Elements,” in: Conference on Bask Research in Metallurgy, O.O.R., U.S. Army, Durham, North Carolina, March 1958.Google Scholar
25. Rudman, P, S., “The Atomic Volumes of the Metallic Elements,” Trans. AIME 233: 864, 1965.Google Scholar
26. Nevitt, M. V., “Alloy Chemistry of Transition Elements,” in: P. A. Beck (ed.), Electronic Structure and Alloy Chemistry of the Transition Elements, Interscience Publishers, New York, 1963, p. 101.Google Scholar