Abstract
ZrB2 (zirconium diboride)-based ceramics reinforced by 15vol.% SiC whiskers with high density were successfully prepared using MoSi2 as sintering aids. The effects of sintering condition and MoSi2 content on densification behavior, phase composition, and mechanical properties of SiCw/ZrB2 composites were studied. Nearly, fully dense materials (relative density >99%) were obtained by hot-pressing (HP) at 1700°C–1800°C in flow argon atmosphere. The grain size of ZrB2 phase in the samples sintered by HP at 1700°C–1800°C were very fine, with mean size below 5 μm. Mechanical properties (such as flexural strength, fracture toughness, and Vickers hardness) of the sintered samples were measured. The sample with 15vol.% MoSi2 addition sintered by HP at 1750°C displayed the best mechanical properties.
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Fahrenholtz WG, Hilmas G E, Talmy I G, et al. Refractory diborides of zirconium and hafnium. Journal of the American Ceramic Society, 2007, 90(5):1347–1364
Monteverde F, Bellosi A, Guicciardi S. Processing and properties of zirconium diboride-based composites. Journal of the European Ceramic Society, 2002, 22(3):279–288
Yan Y, Zhang H, Huang Z, et al. In situ synthesis of ultrafine ZrB2-SiC composite powders and the pressureless sintering behaviors. Journal of the American Ceramic Society, 2008, 91(4):1372–1376
Wang H L, Wang C A, Zhang R, et al. Mechanical properties of ZrB2-based ceramics reinforced by nano-SiC whiskers. Key Engineering Materials, 2007, 353–358:1564–1567
Zhang X H, Xu L, Han W B, et al. Microstructure and properties of silicon carbide whisker reinforced zirconium diboride ultra-high temperature ceramics. Solid State Sciences, 2009, 11(1): 156–161
Yang F Y, Zhang X H, Han J C, et al. Processing and mechanical properties of short carbon fibers toughened zirconium diboridebased ceramics. Materials & Design, 2008, 29(9):1817–1820
Mishra S K, Das S K, Ray A K, et al. Effect of Fe and Cr addition on the sintering behavior of ZrB2 produced by self-propagating high-temperature synthesis. Journal of the American Ceramic Society, 2002, 85(11):2846–2848
Monteverde F, Bellosi A. Effect of the addition of silicon nitride on sintering behavior and microstructure of zirconium diboride. Scripta Materialia, 2002, 46(3):223–228
Wang H L, Wang C A, Yao X F, et al. Processing and mechanical properties of zirconium diborede based ceramics prepared by spark plasma sintering. Journal of the American Ceramic Society, 2007, 90(7):1992–1997
Fahrenholtz W G, Hilmas G E, Zhang S C, et al. Pressureless sintering of zirconium diboride: particle size and additive effects. Journal of the American Ceramic Society, 2008, 91(5):1398–1404
Silvestroni L, Sciti D. Effects of MoSi2 addition on the properties of Hf-and Zr-B2 composites produced by pressureless sintering. Scripta Materialia, 2007, 57(2):165–168
Sciti D, Monteverde F, Guicciardi S, et al. Microstructure and mechanical properties of ZrB2-MoSi2 ceramic composites produced by different sintering techniques. Materials Science and Engineering A, 2006, 434(1–2):303–309
Balbo A S, Sciti D. Spark plasma sintering and hot pressing of ZrB2-MoSi2 ultra-high-temperature ceramics. Materials Science and Engineering A, 2008, 475(1–2):108–112
Sciti D, Guicciardi S, Bellosi A. Properties of a pressureless-sintered ZrB2-MoSi2 ceramic composites. Journal of the American Ceramic Society, 2006, 89(7):2320–2322
Wang H L, Wang C A. Preparation and mechanical properties of laminated zirconium diboride/molybdemum composites sintered by spark plasma sintering. Frontiers of Materials Science in China, 2009, 3(3):273–280
Jeng Y L, Lavernia E J. Processing of molybdenum disilicide. Journal of Materials Science, 1994, 29(10):2557–2571
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Li, CW., Lin, YM., Wang, MF. et al. Preparation and mechanical properties of ZrB2-based ceramics using MoSi2 as sintering aids. Front. Mater. Sci. China 4, 271–275 (2010). https://doi.org/10.1007/s11706-010-0084-2
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DOI: https://doi.org/10.1007/s11706-010-0084-2