Hostname: page-component-8448b6f56d-sxzjt Total loading time: 0 Render date: 2024-04-25T06:29:59.771Z Has data issue: false hasContentIssue false
  • English
  • Français

Reactive Al-Li Powders Prepared by Mechanical Alloying

Published online by Cambridge University Press:  26 February 2011

Xiaoying Zhu ,
Mirko Schoenitz ,
Vern K. Hoffmann  and
Edward L. Dreizin
Xiaoying Zhu
Affiliation:
xz3@njit.edu, New Jersey Institute of Technology, 275 Hickory St.2R, Kearny, New Jersey, 07032, United States
Mirko Schoenitz
Affiliation:
mirko.schoenitz@njit.edu, New Jersey Institute of Technology, United States
Vern K. Hoffmann
Affiliation:
machineempire@yahoo.com, New Jersey Institute of Technology, United States
Edward L. Dreizin
Affiliation:
dreyzin@njit.edu, New Jersey Institute of Technology
Get access

Abstract

Mechanically alloyed powders with the composition Al0.7Li0.3 are synthesized. Materials milled for different times are studied using electron microscopy, x-ray diffraction, and thermal analysis. A solid solution of Li in Al (α-phase) is formed with as much as 10 at % of dissolved Li. The LiAl intermetallic δ-phase is readily produced by mechanical alloying but disappears after extended milling times. The final product of milling for 102 hours consists of an x-ray amorphous phase. Mechanically alloyed powders heated in inert environment exhibit several weak exothermic reactions between 420 and 700 K, and two endothermic reactions, around 810 and 870 K. All the observed relaxation processes become less pronounced and eventually become undetectable as the milling time increases and an amorphous material is produced. Ignition experiments performed for the powders coated on an electrically heated filament showed that the powders ignited in the vicinity of 1250 K. An experimental setup for studying combustion of reactive mechanically alloyed powders is developed and initial experimental results are described.

Keywords

mechanical alloyingLiAl
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 896: Symposium H – Multifunctional Energetic Materials , 2005 , 0896-H01-08
Copyright
Copyright © Materials Research Society 2006

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. O'Brlen, B. and Pradier, A., Proc. ESA Symp., ESTEC, Noordwijk (NL), 293–300 (21–23 March 1990)Google Scholar
2. Zakharov, V. V, Metal Science and Heat Treatment, 45 (1–2), 49–54 (2003)Google Scholar
3. Gilman, P. S., Brooks, J. W. and Bridges, P. J., Aluminum-Lithium Alloys III, edited by Baker, C. et al. , Institute of Metals, London, 112–120 (1986)Google Scholar
4. Ruch, W. and Starke, E. A. Jr, Aluminum-Lithium Alloys III, edited by Baker, C. et al. , Institute of Metals, London, 121–130 (1986)Google Scholar
5. Tack, W. T., and McNamara, D. K., Proc. 6th Int. Alum.-Lithium Conf., 2, 1209–1214 (1992)Google Scholar
6. Moore, J. T., Turns, S. R. and Yetter, R. A., Combust. Sci. and Tech., 177, 627–669 (2005)Google Scholar
7. Schoenitz, M. and Dreizin, E. L., Journal of Materials Research, 18(8), 1827–1836 (2003)Google Scholar
8. Schoenitz, M., Zhu, X. and Dreizin, E. L., J. of Metastable and Nanocrystalline Materials, 20–21, 455–461 (2004)Google Scholar
9. Larson, A. C., and Von Dreele, R. B., Los Alamos National Laboratory Report LAUR 86–748 (2000).Google Scholar
10. Trunov, M. A., Schoenitz, M. and Dreizin, E. L., Proc. of the 9th Int. Workshop on Combustion and Propulsion edited by DeLuca, L., Galfetti, L., and R.A. Pesce-Rodriguez., Arzago d'Adda (BG) Italy, 9.1 – 9.13 (2004)Google Scholar
11. Shoshin, Y. L., Trunov, M. A., Zhu, X., Schoenitz, M. and Dreizin, E. L., Combustion and Flame, 2005 (in press)Google Scholar
12. Ozbilen, S., TMS Annual Meeting, 217–224 (1998)Google Scholar
13. Abis, S., Caciuffo, R., Carsughi, F., Coppola, R., Magnani, M., Rustichelli, F. and Stefanon, M., Physical Review B, 42 (4), 2275–2281 (1990)Google Scholar
14. Shneider, G. L., Metal Science and Heat Treatment, 40 (7-8), 294–298 (1998)Google Scholar
15. Papazian, J. M., Thermal Analysis in Metallurgy, edited by Shull, R. D. and Joshi, A., The Minerals Metals and Materials Society, 259–278 (1992)Google Scholar
16. Axon, H. J., Hume-Rothery, W., Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences, 193 (1032), 1–24 (1948)Google Scholar
17. Sluiter, M. H., Watanabe, Y., de Fontaine, D. and Kawazoe, Y., Physical Review B, 53 (10), 6137–6151 (1996)Google Scholar
18. Levine, E. D. and Rapperport, E. J., Trans. Metall. Soc. AIME 227, 1204–1208 (1963)Google Scholar
19. Sansonetti, J. E. and Martin, W. C., Handbook of Basic Atomic Spectroscopic Data National Institute of Standards and Technology, Gaithersburg, MD 20899 (2005) http://physics.nist.gov/PhysRefData/Handbook/ Google Scholar