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Reaction sintering and mechanical properties of B4C with addition of ZrO2

Published online by Cambridge University Press:  31 January 2011

Hae-Won Kim
Affiliation:
School of Materials Science and Engineering, Seoul National University, Seoul, 151-742, Korea
Young-Hag Koh
Affiliation:
School of Materials Science and Engineering, Seoul National University, Seoul, 151-742, Korea
Hyoun-Ee Kim*
Affiliation:
School of Materials Science and Engineering, Seoul National University, Seoul, 151-742, Korea
*
a)Address all correspondence to this author. e-mail: kimhe@snu.ac.kr
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Abstract

The effect of ZrO2 addition on sintering behavior and mechanical properties of both hot-pressed and pressureless-sintered B4C was investigated. The addition of ZrO2 improved the densification behavior of B4C remarkably via a reaction with the B4C to form ZrB2 at elevated temperatures. When B4C was densified at 2000 °C by hot pressing, only a small amount (approximately 2.5 vol%) of ZrO2 was necessary to achieve a full densification. Excellent mechanical properties (hardness, elastic modulus, flexural strength, and fracture toughness) were observed in those specimens. As the amount of ZrO2 was increased further, the mechanical properties were reduced, except for the fracture toughness, apparently due to the formation of too much ZrB2 in the specimen. Without the applied pressure, larger amounts of ZrO2 should be added to obtain a body with high relative density. When the B4C was sintered at 2175 °C with addition of 10 vol% ZrO2, the specimen has a density higher than 95% of the theoretical, and hardness and flexural strength of 25 GPa and 400 MPa, respectively.

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Articles
Copyright
Copyright © Materials Research Society 2000

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References

REFERENCES

1.Samsonov, G.V. and Vinitskii, I.M., Handbook of Refractory Compounds (IFI/Plenum, New York, 1980).CrossRefGoogle Scholar
2.Tkachenko, Y.G., Yurehenko, D.Z., Yulyugin, V.K., and Lugovskaya, E.S., Sov. Powder Metall. Eng. 12, 41 (1984).Google Scholar
3.Murthy, S.R., J. Mater. Sci. 4, 603 (1985).Google Scholar
4.Evans, A.G., J. Am. Ceram. Soc. 73, 186 (1990).CrossRefGoogle Scholar
5.Hynes, T.V. and Alexander, M.N., J. Chem. Phys. 54, 5296 (1971).CrossRefGoogle Scholar
6.Thevenot, F., Key Eng. Mater. 56–57, 59 (1991).CrossRefGoogle Scholar
7.Range, R.G., Munir, Z.A., and Holt, J.B., Mater. Sci. Res. 6, 17 (1973).Google Scholar
8.Anger, R. and Beauvy, M., Ceram. Int. 10, 49 (1983).CrossRefGoogle Scholar
9.Dole, S. and Prochazska, S., Ceram. Eng. Sci. Proc. 6, 1151 (1985).CrossRefGoogle Scholar
10.Stribbs, D., Brown, C., and Thompson, R., U.S. Patent No. 3 146 571 (1973).Google Scholar
11.Champagne, B. and Angers, R., J. Am. Ceram. Soc. 62, 149 (1979).CrossRefGoogle Scholar
12.Vasilos, T. and Dutta, S.K., Am. Ceram. Soc. Bull. 53, 453 (1974).Google Scholar
13.Kanno, Y., Kawase, K., and Nakano, K., J. Ceram. Soc. Jpn. 95, 1137 (1987).Google Scholar
14.Telle, R., Brook, R.J., and Petzow, G., J. Hard Mater. 2, 79 (1991).Google Scholar
15.Bhattacharya, A.K. and Petrovic, J.J., J. Mater. Sci. 27, 2205 (1992).CrossRefGoogle Scholar
16.Kim, D.K. and Kim, J.H., Adv. Ceram. Mater. 3, 52 (1988).CrossRefGoogle Scholar
17.Zhao, L., Wu, L., Huang, Q., and Yang, Q., J. Mat. Sci. Lett. 15, 353 (1996).Google Scholar
18.Sigl, L.S., J. Eur. Ceram. Soc. 18, 1521 (1998).CrossRefGoogle Scholar
19.Weaver, G., U.S. Patent No. 4 320 204 (1982).Google Scholar
20.Prochazka, S., U.S. Patent No. 4 005 235 (1977).Google Scholar
21.Gototsi, G., Groushevsky, Y., and Ostraovoj, D., J. Mater. Sci. Lett. 7, 814 (1988).CrossRefGoogle Scholar
22.Lee, C.H. and Kim, C.H., J. Mater. Sci. 27, 6335 (1992).CrossRefGoogle Scholar
23.Telle, R. and Petaov, G., Mater. Sci. Eng. A105/106, 97 (1988).CrossRefGoogle Scholar
24.Kim, H-W., Koh, Y-H., and Kim, H-E., J. Am. Ceram. Soc. (in press).Google Scholar
25.Watanabe, T. and Shoubu, K., J. Am. Ceram. Soc. 68, C34 (1985).Google Scholar
26.Chantikul, P., Anstis, G.R., Lawn, B.R., and Marshall, D.B., J. Am. Ceram. Soc. 64, 539 (1981).CrossRefGoogle Scholar
27.JANAF Thermochemical Tables, 3rd ed. (National Bureau of Standards, Washington, DC, 1985).Google Scholar
28.Wu, C.C. and Rice, R.W., Ceram. Eng. Sci. Proc. 6, 977 (1985).CrossRefGoogle Scholar
29.Sigl, L.S. and Kleebe, H., J. Am. Ceram. Soc. 78, 2374 (1995).CrossRefGoogle Scholar