Hostname: page-component-78c5997874-94fs2 Total loading time: 0 Render date: 2024-11-06T09:00:15.800Z Has data issue: false hasContentIssue false
  • English
  • Français

Effect of Cr Addition on the Multiphase Equilibria in the Nb-rich Nb-Si-Ti System - Thermodynamic Modeling and Designed Experiments

Published online by Cambridge University Press:  01 February 2011

Ying Yang ,
Bernard P Bewlay ,
Shuanglin chen ,
M R Jackson  and
Y. A. Chang
Ying Yang
Affiliation:
[email protected], CompuTherm LLC, Madison, Wisconsin, United States
Bernard P Bewlay
Affiliation:
[email protected], GE Global Research Center, Niskayuna, New York, United States
Shuanglin chen
Affiliation:
[email protected], CompuTherm LLC, Madison, Wisconsin, United States
M R Jackson
Affiliation:
[email protected], GE Global Research Center, Niskayuna, New York, United States
Y. A. Chang
Affiliation:
[email protected], University of Wisconsin-Madison, Materials Science and Engineering, Madison, Wisconsin, United States
Get access

Abstract

Refractory Metal Intermetallic Composites (RMICs) based on the Nb-Si system are considered as candidates of next-generation high temperature materials (i.e. >1200°C). Ti and Cr have been shown to have beneficial effects on the oxidation resistance and mechanical properties of Nb-Si alloys. Phase equilibria in the Nb-Si-Ti system have been studied in detail. The present study has investigated multiphase equilibria in the Nb-Si-Ti alloys with Cr additions via an approach of integrating thermodynamic modeling with designed experiments. The alloying effects of Cr on the microstructure of the Nb-Si-Ti alloys are described using both phase equilibria and solidification paths that were calculated from the thermodynamic description of the Nb-Cr-Si-Ti system developed in the present study.

Keywords

phase equilibriaalloysimulation
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1128: Symposium U – Advanced Intermetallic-Based Alloys for Extreme Environment and Energy Applications , 2008 , 1128-U05-42
Copyright
Copyright © Materials Research Society 2009

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. Bewlay, B. P., Jackson, M. R., Zhao, J. C., and Subramanian, P. R., Metall Mater Trans A, 34A(10), 2043 (2003).Google Scholar
2. Bewlay, B. P., Jackson, M. R., Zhao, J. C., Subramanian, P. R., Mendiratta, M. G., and Lewandowski, J. J., MRS Bull, 28(9), 646 (2003).Google Scholar
3. Bewlay, B. P., Jackson, M. R., and Lipsitt, H. A., Metall Mater Trans A, 27A(12), 3801 (1996).Google Scholar
4. Bewlay, B. P., Jackson, M. R., and Subramanian, P. R., JOM, 51(4), 32(1999).Google Scholar
5. Jackson, M. R., Bewlay, B. P., Rowe, R. G., Skelly, D. W., and Lipsitt, H. A., JOM, 48(1), 39 (1996).Google Scholar
6. Mendiratta, M. G., Lewandowski, J. J., and Dimiduk, D. M., Metall Mater Trans A, 22A(7), 1573 (1991).Google Scholar
7. Muggianu, Y. M., Gambino, M., and Bros, J. P., J Chem Phys, 72(1), 83 (1975).Google Scholar
8. Yang, Y. and Chang, Y. A., Thermodynamic Database of Nb Silicide Based Alloys, CompuTherm LLC, Madison, WI 53719 (2008).Google Scholar
9. Yang, Y., Bewlay, B. P., and Chang, Y. A., Intermetallics, Submitted (2008).Google Scholar
10. Du, Y. and Schuster, J. C., Scand J Metall, 31(1), 25 (2002).Google Scholar
11. Chen, S. L., Daniel, S., Zhang, F., Chang, Y. A., Yan, X. Y., Xie, F. Y., Schmid-Fetzer, R., and Oates, W. A., Calphad, 26(2), 175–188 (2002).Google Scholar
12. Scheil, E., Z Metallkd, 34, 242–246 (1942).Google Scholar