Microstructure and Mechanical Properties of ZrB2-SiC-ZrSi2 Composites Fabricated by Spark Plasma Sintering

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In this work, we fabricated ZrB2-SiC-ZrSi2 composites containing different fractions (0.5-5 vol.%) of ZrSi2 by spark plasma sintering at 1600 °C under a uniaxial pressure of 30 MPa. The addition effect of ZrSi2 on the composition, microstructure and mechanical properties of the composites were investigated. The results indicated that the densification of ZrB2-SiC-ZrSi2 composites could be enhanced along with the increase of the added fraction of ZrSi2, with its relative density reaching the maximum of about 85.6% when 3 vol.% of ZrSi2 was added. The hardness of the composites would decrease after the addition of ZrSi2 in the range of 960-1200 HV5. The flexural strength initially increased and then decreased with the addition of ZrSi2, reaching a maximum of about 330 MPa when 3 vol.% of ZrSi2 was added.

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Edited by:

Yiwang Bao, Danyu Jiang and Jianghong Gong

Pages:

143-147

Citation:

C. Chen et al., "Microstructure and Mechanical Properties of ZrB2-SiC-ZrSi2 Composites Fabricated by Spark Plasma Sintering", Key Engineering Materials, Vol. 726, pp. 143-147, 2017

Online since:

January 2017

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$38.00

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[1] C Mroz, Zirconium diboride, Am. Ceram. Soc. Bull. 73 (1994) 141-142.

[2] R Telle, L S Sigl, K Takagi, Boride-based hard materials, in Handbook of Ceramic Hard Materials, ed. by R. Riedel. Wiley-VCH, Wiinheim, Germany, 2000, pp.803-945.

DOI: https://doi.org/10.1002/9783527618217.ch22

[3] K Upadhya, J M Yang, W P Hoffmann, Materials for ultrahigh temperature structural applications. Am. Ceram. Soc. Bull. 76 (1997) 51-56.

[4] M Pastor, Metallic borides: preparation of solid bodies. sintering methods and properties of solid bodies, in Boron and Refractory Borides, ed. by V. I. Matkovich. Springer, New York, 1977, pp.457-493.

DOI: https://doi.org/10.1007/978-3-642-66620-9_25

[5] F Monteverde, A Bellosi, Effect of the addition of silicon nitride on sintering behavior and microstructure of zirconium diboride, Scripta Mater. 46 (2002) 223-228.

DOI: https://doi.org/10.1016/s1359-6462(01)01229-5

[6] F Monteverde, A Bellosi, Development and characterization of metal diboride-based composites toughened with ultra-fine SiC particulates, Solid State Sci. 7 (2005) 622-630.

DOI: https://doi.org/10.1016/j.solidstatesciences.2005.02.007

[7] F Monteverde, A Bellosi, Beneficial effects of AlN as sintering aid on microstructure and mechanical properties of hot-pressed ZrB2, Adv. Eng. Mater. 5 (2003) 508-512.

DOI: https://doi.org/10.1002/adem.200300349

[8] W C Tripp, H H Davis, H C Graham, Effect of a SiC addition on the oxidation of ZrB2, Am. Ceram. Soc. Bull. 52 (1973) 612-616.

[9] A Rezaie, W G Fahrenholtz, G E Hilmas, Oxidation of zirconium diboride-silicon carbide at 1500 ºC at a low partial pressure of oxygen, J. Am. Ceram. Soc. 89 (2006) 3240-3245.

DOI: https://doi.org/10.1111/j.1551-2916.2006.01229.x

[10] D Sciti, S Guicciardi, A Bellosi, G Pezzotti, Properties of a pressureless-sintered ZrB2-MoSi2 ceramic composites, J. Am. Ceram. Soc. 89 (2006) 2320-2322.

DOI: https://doi.org/10.1111/j.1551-2916.2006.00999.x

[11] A Bellosi, F Monteverde, D Sciti, Fast densification of ultra-hightemperature ceramics by spark plasma sintering, Int. J. Appl. Ceram. Technol. 3 (2006) 32-40.

[12] S Q Guo, T Nishimura, Y Kagawa, Mechanical properties of hot-pressed ZrB2-MoSi2-SiC composites, J. Eur. Ceram. Soc. 28 (2008) 1891-1898.

DOI: https://doi.org/10.1016/j.jeurceramsoc.2008.01.003