Abstract
The segregation features and interface characteristics in an Al/W composite system processed through liquid metallurgy technique under 1 g conditions has been studied. The effect of various melting parameters on the Al/W system containing 60 wt% (about 20 at%) tungsten particles, was investigated and the consequent metallographic features of these composites were studied. Although most of the segregation of tungsten particles was observed at the bottom of the sample, segregation was also noticed towards the side walls and the top portion of the sample. The segregation pattern is explained in terms of force under Stoke's law and conventional convection. The formation of intermetallic compounds between aluminium and tungsten, and limited solubility between these two elements, is also reported.
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L. CASTELLANI, P. GONDI, F. BARBIERI and N. COSTA, in “Proceedings of the 3rd European Symposium on Material Sciences in Space”, Grenoble, 1979, edited by T. D. Guyenne (ESA Scientific and Technical Publications Branch, Noordwijk) ESA SP-142, p. 81.
D. UHLMAN, NASA Report TM-X 3458 (NASA) Ch. III, pp. III. I–III. 40.
D.M. STEFANESCU, A. MOITRA, A. S. KACAR and B. K. DHINDAW, Met. Trans. 21A (1990) 231.
B. K. DHINDAW, A. MOITRA, D. M. STEFANESCU and P. CURRERI, ibid. 19A (1988) 1899.
J. POTSCHKE and K. HOHENSTEIN, Acta Astronaut. 9 (1982) 261.
F. BARBEIRI, C. PATUELLI, P. GONDI and R. MONTANARI, in “Proceedings of the 5th European Symposium on Materials Sciences under Microgravity”, Schloss Elmau, 1984, edited by T. D. Guyenne, ESA SP-222, p. 101.
H. KLEIN and R. NAHLE, in “Proceedings of the 4th European Symposium on Materials Sciences under Microgravity”, Madrid, 1983, edited by T. D. Guyenne and J. Hunt, ESA SP-191, p. 37.
T. KAWADA, S. YOSHIDA, S. YAKAHASHI, E. OZAGA and R. YODA, in “AIAA 15th Aerospace Meeting”, (1977), p. 77.
S. TAKAHASHI, in “Proceedings of the 5th International Conference on Composite Materials”, San Diego, CA, (1985) p. 747.
R. J. NAUMANN and H. W. HERRING, “Materials Processing in Space: Early Experiments” (NASA Scientific and Technical Information Branch, Washington, 1980), p. 70.
D. R. UHLMANN, SPAR V Final Report, NASA TM 78275 (NASA, 1980), pp. II.1–II.49.
Idem, SPAR IV Final Report, NASA T M 78235 (NASA, 1980), pp. II.1–II.46.
L. RAYMOND and C. Y. ANG, SPAR II Final Report, NASA TM-X 78-215 (NASA) p. II. 1
H. U. WALTER, in “Proceedings of the 3rd European Symposium on Materials Sciences in Space”, p. 245.
H. HAMACHER, in “Materials Sciences in Space”, edited by B. Feuerbacher, H. Harnacher and R. J. Naumann (Springer, 1986) p. 34.
V. S. AVDUYEVSKY, (ed.), “Scientific Foundations of Space Manufacturing” (MIR, Moscow, 1984) p. 32.
M. A. BAYOUMI and M. SUERY, in “Proceedings of the World Materials Congress”, edited by Fishwan and Dhingra (ASM, Chicago, 1988), p. 167.
L. F. MONDOLFO, “Aluminium Alloys: Structures and Properties” (Butterworths, London, 1976) p. 394.
L. FROYEN and A. DERUYTTERE, in “Proceedings of the 5th European Symposium on Materials Sciences under Microgravity”, p. 69.
“Metals Handbook”, Vol. 2 10th Edn, (ASM International, 1990) p. 1090.
A. MOITRA, B. K. DHINDAW and D. M. STEFANESCU, in “Proceedings of the Conference on Solidification of Metal Matrix Composites”, Indianapolis, edited by P. Rohatgi (TM, PA, 1990) p. 159.
S. RAMSESHAN, in “Proceedings of the Workshop on Materials Processing in Space”, Bangalore, edited by S. Ramseshan and M. K. Tiwari (Indian Academy of Sciences, Bangalore, 1982) p. 3.
RODNEY P. ELLIOTT, “Constitution of Binary Alloys” (McGraw-Hill, New York, 1965) p. 63.
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Sharma, S.C., Narayanan, P.R., Sinha, P.P. et al. Processing characteristics of Al/W composite under 1 g conditions. JOURNAL OF MATERIALS SCIENCE 29, 5719–5724 (1994). https://doi.org/10.1007/BF00349971
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DOI: https://doi.org/10.1007/BF00349971