研究了ZrB2-20vol%SiC超高温陶瓷在空气气氛中的氧化行为,分析了氧化温度、氧分压和氧化时间等对硅酸锆形成和晶体生长过程的影响,提出了ZrB2-SiC超高温陶瓷氧化过程中硅酸锆相的形成机制.热力学计算结果表明,硅酸锆相的形成与高温下SiC的活性氧化有关.实验结果表明,常压氧化过程中,硅酸锆的形成可分为两个阶段,(Ⅰ)形核,这一过程与SiC的活性氧化有关;(Ⅱ)晶体生长,随着氧化时间的延长,氧化后形成的富硅玻璃相与氧化锆在硅酸锆晶核处反应,晶粒进一步长大.研究表明,在1500℃氧化90min后,硅酸锆的晶粒尺寸达到100μm左右.
参考文献
| [1] | Opeka M M,Talmy I G,Zaykoski J A.Oxidation based materials selection for 2000℃ plus hypersonic aerosurfaces:theoretical considerations and historical experience.Journal of Materials Science,2004,39(19):5887-5904. |
| [2] | Opeka Mark M,TalmyInna G,Wuchina Eric J,et al.Mechanical,thermal,and oxidation properties of refractory hafnium and zirconium compounds.J.Euro.Ceram.Soc.,1999,19(13/14):2405-2414. |
| [3] | Diletta Sciti,Frédéric Monteverde,Stefano Guicciardi,et al.Microstructure and mechanical properties of ZrB2-MoSi2 ceramic.Materials Science and Engineering A,2006,434(1/2):303-309. |
| [4] | Zhang Xinghong,Xu Lin,Han Wenbo,et al.Microstructure and properties of silicon carbide whisker reinforced zirconium diboride ultra-high temperature ceramics.Solid State Science,2009,11(1):156-161. |
| [5] | 闫永杰,张辉,黄政仁,等(YAN Yong-Jie,et al),常压烧结zrB2-SiC复相材料的抗氧化行为研究.无机材料学报(Journal of Inorganic Materials),2009,24(3):631-635. |
| [6] | Frédéric Monteverde,Luigi Scatteia.Resistance to thermal shock and to oxidation of metal diborides-SiC ceramics for aerospace application.J.Am.Ceram.Soc.,2007,90 (4):1130-1138. |
| [7] | Parthasarathy T A,Rapp R A,Opeka M,et al.A model for the oxidation of ZrB2,HfB2 and TiB2.Acta Materialia,2007,55(17):5999-6010. |
| [8] | Rezaie Alireza,Fahrenholtz William G,Hilmas Gregory E.Evolution of structure during the oxidation of zirconium diboride-silicon carbide in air up to 1500℃.J.Euro.Ceram.Soc.,2007,27(6):2495-2501. |
| [9] | Han Wen-Bo,Hu Ping,Zhang Xing-Hong,et al.High-temperature oxidation at 1900℃ of ZrB2-xSiC ultrahigh-temperature ceramic composites.J.Am.Ceram.Soc.,2008,91(10):3328-3334. |
| [10] | Han Jiecai,Hu Ping,Zhang Xinghong,et al.Oxidation-resistant ZrB2-SiC composites at 2200℃.Composites Science and Technology,2008,68(3/4):799-806. |
| [11] | Fahrenholtz William G.The ZrB2 volatility diagram.J.Am.Ceram.Soc.,2005,88(12):3509-3512. |
| [12] | Fahrenholtz William G.Thermodynamics of ZrB2-SiC oxidation:the formation of a SiC-depleted region.J.Am.Ceram.Soc.,2007,90(1):143-148. |
| [13] | Gao Dong,Fu Jingying,Zhang Yue,et al.Oxidation of zirconium diboride-silicon carbide ceramics under an oxygen partial pressure of 200 Pa:formation of zircon.Corros.Sci.,2010,52(10):3297-3303. |
| [14] | Watson E B,Cherniak D J.Oxygen diffusion in zircon.Earth and Planetary Science Letters,1997,148(3/4):527-544. |
| [15] | Arno Kaiser,Markus Lobert,Rainer Telle.Thermal stability of zircon (ZrSiO4).J.Euro.Ceram.Soc.,2008,28(11):2199-2211. |
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