Hostname: page-component-586b7cd67f-dlnhk Total loading time: 0 Render date: 2024-11-23T16:28:19.651Z Has data issue: false hasContentIssue false
  • English
  • Français

New technique for pressureless infiltration of Al alloys into Al2O3 preforms

Published online by Cambridge University Press:  31 January 2011

B. Srinivasa Rao  and
V. Jayaram
B. Srinivasa Rao
Affiliation:
Department of Metallurgy, Indian Institute of Science, Bangalore-560 012, India
V. Jayaram
Affiliation:
Department of Metallurgy, Indian Institute of Science, Bangalore-560 012, India
Get access

Abstract

Al alloys were infiltrated into alumina preforms without the aid of pressure in N2 as well as in air at and above 750 °C. It was possible to eliminate termination of infiltration that was seen in open conditions (where N2 was in continuous contact with the melt) by modifying the infiltration geometry. This configuration enables the infiltration to continue for longer periods of time, consequently producing greater thickness of composite. In air, Mg placed at the interface getters the in-coming oxygen until the alloy billet melts and seals off the front from the ingress of the furnace atmosphere thereby eliminating the need for prealloying Al with Mg and N2 atmosphere. In addition, experiments in argon revealed that the infiltration requires some critical amount of N2 in the atmosphere.

Type
Articles
Information
Journal of Materials Research , Volume 16 , Issue 10 , October 2001 , pp. 2906 - 2913
Copyright
Copyright © Materials Research Society 2001

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

1Semlak, K.A. and Rhines, F.N., AMIE Trans. 212, 324 (1958).Google Scholar
2Aghajanian, M.K., Burke, J.T., White, D.R., and Nagelberg, A.S., SAMPE Quarterly 20, 43 (1989).Google Scholar
3Aghajanian, M.K., Rocazella, M.A., Burke, J.T., and Keck, S.D., J. Mater. Sci. 26, 447 (1991).CrossRefGoogle Scholar
4Schiroky, G.H., Miller, D.V., Aghajanian, M.K., and Fareed, A.S., Key Eng. Mater. 127–131, 141 (1997).Google Scholar
5Srinivasa Rao, B. and Jayaram, V., Acta Mater. 49, 2373 (2001).CrossRefGoogle Scholar
6Reding, J.N. and Bothwell, M.R., U.S. Patent No. 33, 64, 976.Google Scholar
7Schweighofer, A. and Kudela, S., Kovove Mater. 3, 257 (1977).Google Scholar
8Champion, J.A., Keene, B.J., and Sillwood, J.M., J. Mater. Sci. 4, 39 (1969).CrossRefGoogle Scholar
9Clarke, D.G., Little, J.A., and Clyne, T.W., in International Confer-ence on Advanced Composite Materials, edited by Chandra, T. and Dhingra, A.K. (TMS, 1993), p. 993.Google Scholar
10Laurent, V., Chatain, D., Chatillon, C., and Eustathopoulos, N., Acta. Metall. 36, 1797 (1988).CrossRefGoogle Scholar
11Brennan, J.J. and Pask, J.A., J. Am. Ceram. Soc. 15, 569 (1968).CrossRefGoogle Scholar
12Wolf, S.M., Levitt, A.P., and Brown, J., Chem. Eng. Sci. 62, 74 (1996).Google Scholar
13Weirauch, D.A. Jr., Ceramic Microstructures: ’86: Role of Inter-faces (Plenum Press, New York, 1987), Vol. 21, p. 329.CrossRefGoogle Scholar
14Eustathopoulos, N., Joud, J.C., Desre, P., and Hicter, J.M., J. Mater. Sci. 9, 1233 (1974).CrossRefGoogle Scholar
15Laurent, V., Chatain, D., and Eustathopoulos, N., J. Mater. Sci. 22, 244 (1987).CrossRefGoogle Scholar
16Madeleno, U., Liu, H., Shinoda, T., Mishima, Y., and Suzuki, T., J. Mater. Sci. 25, 3273 (1990).CrossRefGoogle Scholar
17Weirauch, A. Jr., J. Mater. Res. 3, 729 (1988).CrossRefGoogle Scholar
18Garcia-Cordovila, C., Louis, E., and Pamies, A., J. Mater. Sci. 21, 2787 (1986).CrossRefGoogle Scholar
19Chaklader, C.D., Armstrong, A.M., and Misra, S.K., J. Am. Ceram. Soc. 51, 630 (1968).CrossRefGoogle Scholar
20Washburn, E.W., Phys. Rev. 17, 273 (1921).CrossRefGoogle Scholar
21Goicoechea, C., Garcia-Cordovilla, C., Louis, E., and Pamies, A., J. Mater. Sci. 27, 5247 (1992).Google Scholar
22Gebhardt, E., Becker, M., and Dorner, S., Aluminium 7/8, 315 (1955).Google Scholar