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Microstructure and properties of pressureless sintered ZrC-based materials

Published online by Cambridge University Press:  31 January 2011

Laura Silvestroni  and
Diletta Sciti
Laura Silvestroni
Affiliation:
National Research Council—Institute of Science and Technology for Ceramics (CNR-ISTEC), I-48018 Faenza, Italy
Diletta Sciti*
Affiliation:
National Research Council—Institute of Science and Technology for Ceramics (CNR-ISTEC), I-48018 Faenza, Italy
*
a)Address all correspondence to this author. e-mail: diletta.sciti@istec.cnr.it
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Abstract

ZrC-based composites were produced by pressureless sintering thanks to the addition of MoSi2 as sintering aid. After preliminary tests, a baseline ZrC material and two mixed ZrC–HfC and ZrC–ZrB2 composites with 20 vol% MoSi2 were densified at 1900 to 1950 °C reaching final relative densities of 96%–98%. Mean particle size of the dense bodies ranged from 5 to 9 μm. Secondary phases were found to form during sintering, such as SiC and Zr–Mo–Si-based compounds. Room-temperature mechanical properties were in the range of the values reported in the literature for similar materials densified by pressure-assisted techniques. The flexural strength was tested at room temperature, 1200 and 1500 °C.

Keywords

CeramicDensificationMicrostructure
Type
Articles
Information
Journal of Materials Research , Volume 23 , Issue 7 , July 2008 , pp. 1882 - 1889
Copyright
Copyright © Materials Research Society 2008

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References

REFERENCES

1Pierson, H.O.: Handbook of Refractory Carbides and Nitrides William Andrew Publishing/Noyes Westwood, NJ 1996 68Google Scholar
2Ogawa, T.Ikawa, K.: Diffusion of metal fission products in ZrC1.0. J. Nucl. Mater. 105, 331 1982CrossRefGoogle Scholar
3Barnier, P., Brodhag, C.Thevenot, F.: Hot pressing kinetics of zirconium carbide. J. Mater. Sci. 21, 2547 1986CrossRefGoogle Scholar
4Min-Haga, E.Scott, W.D.: Sintering and mechanical properties of ZrC–ZrO2 composites. J. Mater. Sci. 23, 2865 1988CrossRefGoogle Scholar
5Ryu, H.J., Lee, Y.W., Cha, S.I.Hong, S.H.: Sintering behaviour and microstructure of carbides and nitrides for the inert matrix fuel by spark plasma sintering. J. Nuclear Appl. 352, 341 2006Google Scholar
6Johnson, W.B., Nagelberg, A.S.Breval, E.: Kinetics of formation of a platelet-reinforced ceramic composite prepared by the directed reaction of zirconium with boron carbide. J. Am. Soc. 74, 2093 1991Google Scholar
7Tsuchida, T.Yamamoto, S.: MA–SHS and SPS of ZrB2–ZrC composites. Solid State Ionics 172, 215 2004CrossRefGoogle Scholar
8Kim, K.H.Shim, K.B.: The effect of lanthanum on the fabrication of ZrB2–ZrC composites by spark plasma sintering. Mater. Charact. 50, 31 2003Google Scholar
9Silvestroni, L.Sciti, D.: Effects of MoSi2 additions on the properties of (Hf–and Zr)B2 composites produced by pressureless sintering. Scr. Mater. 57, 165 2007CrossRefGoogle Scholar
10Sciti, D., Silvestroni, L.Bellosi, A.: High density pressureless-sintered HfC-based composites. J. Am. Ceram. Soc. 89, 2668 2006CrossRefGoogle Scholar
11Munz, D.G., Shannon, J.L. Jr., Bubsey, R.T.: Fracture toughness calculation from maximum load in four point bend tests of chevron notch specimens. Int. J. Fract. 16, R137 1980Google Scholar
12Gokhale, A.B.Abbaschian, G.J.: The Mo–Si (molybdenum– silicon) system. J. Phase Equilib. 12(4), 493 1991CrossRefGoogle Scholar
13Fan, X., Kack, K.Ishigawi, T.: Calculated C–MoSi2 and B–Mo5Si3 pseudo-binary diagrams for the use in advanced materials processing. Mater. Sci. Eng., A 278, 46 2000CrossRefGoogle Scholar
14Nomura, N., Suzuki, T., Nakatani, S., Yoshimi, K.Hanada, S.: Joining of oxidation-resistant Mo–Si–B multiphase alloy to heat-resistant Mo–ZrC in-situ composite. Intermetallics 11, 51 2003CrossRefGoogle Scholar
15Krajewski, A., D’Alessio, L.De Maria, G.: Physico-chemical and thermophysical properties of cubic binary carbides. Cryst. Res. Technol. 33, 341 19983.0.CO;2-I>CrossRefGoogle Scholar
16Materials Science and Engineering Handbook, 3rd ed edited by J.F. Shackelford and W. Alexander CRC Press Boca Raton, FL 2001 762Google Scholar
17Wiley, D.E., Manning, W.R., Hunter, O. Jr.: Elastic properties of polycrystalline TiB2, ZrB2, and HfB2 from room temperature to 1300 K. J. Less-Common Met. 18, 149 1969CrossRefGoogle Scholar
18Berkowitz-Mattuck, J.B.: High-temperature oxidation, IV. Zirconium and hafnium carbides. J. Electrochem. Soc. 114, 1030 1967CrossRefGoogle Scholar
19Sciti, D., Brach, M.Bellosi, A.: Oxidation behavior of a pressureless sintered ZrB2-MoSi2 ceramic composite. J. Mater. Res. 20, 922 2005CrossRefGoogle Scholar
20Zhu, Y.T., Shu, L.Butt, F.P.: Kinetics and products of molybdenum disilicide powder oxidation. J. Am. Ceram. Soc. 85, 507 2002CrossRefGoogle Scholar
21Savino, R., Stefano De Fumo, M., Silvestroni, L.Sciti, D.: Arc-jet testing on HfB2 and HfC-based ultra-high-temperature-ceramic materials. J. Eur. Ceram. Soc. 28, 1899 2008CrossRefGoogle Scholar