Thermal shock behavior of ZrB2--SiC ceramics with different quenching media
Thermal shock behavior of ZrB2--SiC ceramics with different quenching media
Chang-An WANG1(), Ming-Fu WANG2
1. State Key Lab of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China; 2. Science and Technology on Scramjet Laboratory, Beijing 100074, China
The thermal shock behavior of ZrB2--SiC ceramics was studied with water, air and methyl silicone oil as quenching media, respectively. The temperature of all coolants was room temperature (25°C) and the residual strength of the ceramics after quenching was tested. The strength of the ceramics after water quenching had an obvious drop when the temperature difference, ΔT, was about 275°C, while the residual strength of the specimens quenched by air and silicone oil only varied a little and even increased slightly when the temperature difference was higher than 800°C. The different thermal conductive coefficient of the coolants and surface heat transfer coefficient resulted in the differences in the thermal shock behavior. The formation of oxidation layer was beneficial for improving the residual strength of the ceramics after quenching.
Corresponding Author(s):
WANG Chang-An,Email:wangca@mail.tsinghua.edu.cn
引用本文:
. Thermal shock behavior of ZrB2--SiC ceramics with different quenching media[J]. Frontiers of Materials Science, 2013, 7(2): 184-189.
Chang-An WANG, Ming-Fu WANG. Thermal shock behavior of ZrB2--SiC ceramics with different quenching media. Front Mater Sci, 2013, 7(2): 184-189.
Fahrenholtz W G, Hilmas G E, Talmy I G, . Refractory diborides of zirconium and hafnium. Journal of the American Ceramic Society , 2007, 90(5): 1347-1364
2
Wang H L, Wang C A, Chen D L, . Preparation and characterization of ZrB2-SiC ultra-high temperature ceramics by microwave sintering. Frontiers of Materials Science in China , 2010, 4(3): 276-280
3
Opeka M M, Talmy I G, Wuchina E J, . Mechanical, thermal, and oxidation properties of refractory hafnium and zirconium compounds. Journal of the European Ceramic Society , 1999, 19(13-14): 2405-2414
4
Opeka M M, Talmy I G, Zaykoski J A. Oxidation-based materials selection for 2000°C+ hypersonic aerosurfaces: theoretical considerations and historical experience. Journal of Materials Science , 2004, 39(19): 5887-5904
5
Monteverde F, Guicciardi S, Melandri C, . Densification, microstructure evolution and mechanical properties of ultrafine SiC particle-dispersed ZrB2 matrix composites, . In: Orlovskaya N,Lugovy M, eds. NATO Science for Peace and Security Series B: Physics and Biophysics. Boron Rich Solids: Sensors, Ultra High Temperature Ceramics, Thermoelectrics, Armor . Springer, 2011, 261 -272
6
Monteverde F. The addition of SiC particles into a MoSi2-doped ZrB2 matrix: Effects on densification, microstructure and thermo-physical properties. Materials Chemistry and Physics , 2009, 113(2-3): 626-633
7
Zhang Z P, Shao Y F, Song F. Characteristics of crack patterns controlling the retained strength of ceramics after thermal shock. Frontiers of Materials Science in China , 2010, 4(3): 251-254
8
Zimmermann J W, Hilmas G E, Fahrenholtz W G. Thermal shock resistance of ZrB2 and ZrB2-30% SiC. Materials Chemistry and Physics , 2008, 112(1): 140-145
9
Meng S H, Liu G Q, Guo Y, . Mechanisms of thermal shock failure for ultra-high temperature ceramic. Materials & Design , 2009, 30(6): 2108-2112
10
Hugot F, Glandus J C. Thermal shock of alumina by compressed air cooling. Journal of the European Ceramic Society , 2007, 27(4): 1919-1925
11
Osterstock F, Monot I, Desgardin G, . Influence of grain size on the toughness and thermal shock resistance of polycrystalline YBa2Cu3O7-δ. Journal of the European Ceramic Society , 1996, 16(7): 687-694
12
Absi J, Glandus J C. Improved method for severe thermal shocks testing of ceramics by water quenching. Journal of the European Ceramic Society , 2004, 24(9): 2835-2838
13
Tao W S. An Introduction to Heat Transfer. Beijing: Higher Education Press, 2002 (in Chinese)
14
Monteverde F, Scatteia L. Resistance to thermal shock and to oxidation of metal diborides-SiC ceramics for aerospace application. Journal of the American Ceramic Society , 2007, 90(4): 1130-1138
15
Kingery W D, Bowen H K, Uhlmann D R. Introduction to Ceramics (2nd edition). New York: John Wiley & Sons Publisher, 1975
16
Hu P, Wang Z, Sun X. Effect of surface oxidation on thermal shock resistance of ZrB2-SiC-G composite. International Journal of Refractory Metals & Hard Materials , 2010, 28(2): 280-285
