Abstract
The mechanical properties of inviscid melt spun (IMS) CaO-Al2O3 (46.5 wt % CaO-53.5 wt % Al2O3) eutectic fibres were examined by fractographic analysis as well as four-point bending and micro-indentation. The averaged fracture strength and elastic modulus values of the IMS Calcia-Alumina (CA) fibre were determined to be 460 MPa and 99.8 GPa, respectively by using four-point bending tests. The inner mirror constant (M) was determined to be 2.39 MPa·m1/2 by using the plot of the fracture strength (σf) obtained from the bending tests as a function of r −1/2, where r is the inner mirror radius measured from scanning electron microscopy (SEM) on the fractured CA fibres. The flaw-to-mirror ratio (c/r) for the CA fibre was calculated to be 1∶11.24. Also, the critical flaw size (c) of the CA fibre was estimated to be 2.35 μm. The averaged elastic modulus value from Knoop micro-indentation was determined to be 102.5 GPa which is in good agreement with that from the four-point bending tests.
Similar content being viewed by others
References
R. E. Cunningham, L. F. Rakestraw and S. A. Dunn, in “Spinning Wire From Molten Metal” AIChE Symposium Series, Vol. 74, edited by J. W. Mottern and W. J. Privott (American Institute of Chemical Engineers, NY, 1978) p. 20.
B. S. Mitchell, K. Y. Yon, S. A. Dunn and J. A. Koutsky, Mater. Lett. 10 (1990) 71.
F. T. Wallenberger, N. E. Weston and S. A. Dunn, J. Non-Cryst. Solids 24 (1990) 116.
F. T. Wallenberger, Ceram. Bull. 69 (1990) 1646.
F. T. Wallenberger, N. E. Weston and S. A. Dunn, J. Mater. Res. 5 (1990) 2682.
Idem, SAMPE Quart. 21 (1990) 30.
F. T. Wallenberger, N. E. Weston, K. Motzfelt and D. G. Swartzfager, J. Amer. Ceram. Soc. 75 (1992) 629.
Y.-M. Sung, S. A. Dunn and J. A. Koutsky, Ceram. Inter. 21 (1995) 169.
B. S. Mitchell, K. Y. Yon, S. A. Dunn and J. A. Koutsky, Chem. Engng Comm. 106 (1991) 87.
Y.-M. Sung, S. A. Dunn and J. A. Koutsky, Ceram. Inter. 20 (1994) 337.
Y.-M. Sung, J. A. Koutsky, and S. A. Dunn, J. Mater. Sci. 30 (1995) 5995.
Y.-M. Sung and S. A. Dunn, J. Mater. Sci. in press.
J. O. Carlsson, in “Encyclopedia of Materials Science and Engineering” edited by M. B. Bever (Pergamon Press, Oxford, 1986) p. 4406.
P. Martinean, M. Lahaye, R. Pailler, R. Nalsan, M. Couzi and F. Cruege, J. Mater. Sci. 19 (1984) 2371.
S. R. Nutt and F. E. Wawner, Ibid.— 20 (1985) 1953.
J. A. Dicarlo, Ibid.— 21 (1986) 217.
S. Yajima, Y. Hasegawa, J. Hayasi and M. Imura, Ibid.— 13 (1978) 2569.
Y. Hasegawa, Ibid.— 24 (1989) 1177.
K. Okamura, M. Sato, T. Matsuzawa, T. Seguchi and S. Kawanishi, Ceramic Engng Sci. Proc. 9 (1988) 909.
J. D. Birchall, in “Encyclopedia of Materials Science and Engineering” edited by M. B. Bever (Pergamon Press, Oxford, 1986) p. 2333.
J. D. Birchall, J. A. Bradbury and J. Dinwoodie, in “Handbook of Composites” edited by W. Watt and B. V. Perov (North-Holland, Amsterdam, 1985).
S. Nourbakhsh, F. L. Liang and H. Margolin, J. Mater. Sci. Lett. 8 (1989) 1252.
K. R. Venkatachari, L. T. Moeti, M. D. Sacks and J. H. Simmons, Ceram. Engng Sci. Proc. 11 (1990) 1512.
D. D. Johnson, A. R. Holtz and M. F. Grether, Ibid.— 8 (1987) 744.
T. Nishio and Y. Fujika, J. Ceram. Soc. Jpn, Int. 99 (1991) 638.
Y.-M. Sung, S. A. Dunn and J. A. Koutsky, J. Eur. Ceram. Soc. 14 (1994) 455.
K.-Y. Yon, B. S. Mitchell, S. A. Dunn and J. A. Koutsky, Cement & Concrete Composites 15 (1993) 165.
Y.-M. Sung, K.-Y. Yon, S. A. Dunn and J. A. Koutsky, J. Mater. Sci. 29 (1994) 5583.
Y.-M. Sung, in preparation.
W. C. Levengood, J. Appl. Phys. 29 (1958) 820.
E. B. Shand, J. Amer. Ceram. Soc. 42 (1959) 474.
J. W. Johson and D. G. Holloway, Phil. Mag. 14 (1966) 731.
J. J. Mecholsky, R. W. Rice and S. W. Freiman, J. Amer. Ceram. Soc. 57(1974) 440.
J. J. Mecholsky, S. W. Freiman, and R. W. Rice, J. Mater. Sci. 11 (1976) 1310.
J. J. Mecholsky and M. G. Drexhage, J. Amer. Ceram. Soc. 63 (1980) 347.
D. A. Krohn and D. P. H. Hasselman, Ibid— 54 (1971) 411.
S. R. Choi, Phys. & Chem. Glass. 32 (1991) 79.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Sung, Y.M., Sung, I.M. Fractographic analysis of vitreous calcia-alumina eutectic fibres produced by inviscid melt spinning (IMS). JOURNAL OF MATERIALS SCIENCE 31, 4775–4778 (1996). https://doi.org/10.1007/BF00355860
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF00355860