The influence of Fe content on spreading ability of tungsten heavy alloys matrix on tungsten surface

• Autorzy: Kaczorowski M. , Skoczylas P. , Krzyńska A.
• Języki publikacji: EN

Abstrakty

EN

The results of experimental study of tungsten spreading ability with W-Ni-Co-Fe matrix are presented. The aim of these investigations was to see how Fe concentration in W – Ni – Co matrix influences the wettability of tungsten grains during liquid phase sintering. Four green compact specimens containing 50%W, 10%Co and Ni + Fe = 40% but with different Ni to Fe ratio were prepared. The cylindrical specimen 5mm diameter and 5mm height were put on clean pure tungsten substrate and then 20 minutes heated at 1520ºC in hydrogen atmosphere. After heating the specimens were carefully measured and then the specimens for structure observations were prepared. It was concluded, that increase of Fe content decrease the melting temperature of W – Ni – Co alloy. The melting point decrease caused by Fe content increase substantially the spreading ability of tungsten substrate with W – Ni – Co alloy. Metallography investigations showed some microstructure changes in “reaction zone” identified in tungsten substrate – (WNi_40-xCo₁₀Fe_x) interface. The results of the study confirmed our earlier observations that even relative small Fe addition promotes Weight Heavy Alloys (WHA) liquid phase sintering.

Słowa kluczowe

EN

weight heavy alloy; microstructure change; liquid phase sintering

PL

wolframowy stop ciężki; zmiana mikrostruktury; faza ciekła spiekania

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2011
• Tom: Vol. 11, iss. 3 spec.
• Strony: 103--106
• Opis fizyczny: Bibliogr. 13 poz., rys., tab., wykr.

Twórcy

autor

Kaczorowski M.

• Institute of Mechanics and Printing, Faculty of Production Engineering, Warsaw University of Technology, ul. Narbutta 85, 02-524 Warszawa, Poland

autor

Skoczylas P.

• Institute of Mechanics and Printing, Faculty of Production Engineering, Warsaw University of Technology, ul. Narbutta 85, 02-524 Warszawa, Poland

autor

Krzyńska A.

• Institute of Technology, Faculty of Production Engineering, Warsaw University of Technology, ul. Narbutta 85, 02-524 Warszawa, Poland

Bibliografia

• [1] R.M. German, in: A. Bose, R.J. Dowling (Eds), Proc. Int. Conference on Tungsten and Tungsten Alloys, MPIF, Princeton, New Jersey, 1992, pp. 3.
• [2] A. Bose, D. Kapoor, L.S.Jr Magness, R.J. Dowling: Proc. Int. Conference on Tungsten and Tungsten Alloys, MPIF, Princeton, New Jersey, 1997, p. 321.
• [3] L.S. Magness, Proc. Int. Conference on Tungsten and Tungsten Alloys, MPIF, Princeton, New Jersey, 1995, p. 133.
• [4] J.W. Noh. E.P. Kim, H.S. Song, W.H. Baek, K.S. Churn, S.J.L. Kang: Met. Trans., A 24 (1993) pp. 2411.
• [5] R.J. Dowling, M.C. Hogwood, L. Wong, R.L. Woodward, in: A Bose R.J. Dowling (Eds.) Proc. Int. Conference on Tungsten and Refractory Metals, MPIF, New Jersey, 1994, p. 3.
• [6] M. Zhou. R.J. Clifton, J. Appl. Mech. 64 (1997) p. 487.
• [7] D.K. Kim, S. Lee, H.S. Song: Met. Mater. Trans. A 29 (1998) p. 1057.
• [8] E.P. Kim, M.H. Hong, W.H. Baek, I.H. Moon : Met. Mater. Trans., A30 (1999) p. 627.
• [9] D.K. Kim, S. Lee, H.J. Ryu, S.H. Hong, J.W. Noh, Met. Mat. Trans. A 31 (2000) p. 2475.
• [10] S.P. Andrew, R.D. Caligiuru, L.E. Eiselstein, in: A. C, E.S. Chen (Eds.) Tungsten and Tungsten Alloys – Recent Advances, TES, Warrendale, PA, 1991, p. 141.
• [11] L.S. Magness, T.G. Farrad, in: Proc. Of 1990 Army Soc. Conf. Durham, NC, May 1990.
• [12] A. Bose, R.M. German , Metall. Trans. A 19 (1988) p. 3100.
• [13] A. Fernández Guillermet, “Thermodynamics of the Co-Ni-W System: A preliminary CALPHAD Analysis”, Report Trita-Mac-0373, The Royal Institute of Technology, Stockholm, Sweden, 1988.