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低温常压烧结制备碳化硅–莫来石复相材料

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Abstract:

将6H-SiC和α-Al2O3按质量比为73混合,添加0~10%的[BaO+TiO2]作为烧结助剂,球磨后的均匀粉体压制成生坯,在1200℃预氧化1h后在氢气气氛下常压烧结1h制备SiC-莫来石复相材料。研究了烧成温度和BaO–TiO2含量对该复相材料烧结性能和相组成的影响。结果表明1500℃下,随着烧结助剂含量的增加,烧结致密性明显提高,当含量(质量分数)达到8%时,获得显气孔率为0.17%的致密复相材料。预氧化时,烧结助剂中的BaO与α-Al2O3及SiC氧化生成的方石英反应,生成钡长石BaAl2Si2O8,烧成过程中,钡长石转化成玻璃相,促进莫来石的生成,同时促进烧结。复相材料主晶相为6H-SiC和莫来石,次相为玻璃相和Al2SiO5。

References

[1]  ? She Jihong, Yang JianFeng, Naoki K, et al. High-strength porous silicon carbide ceramics by an oxidation-bonding technique [J]. J Am Ceram Soc, 2002, 85(11): 2852.
[2]  ? Ren Fengzhang, Wang Zhe, Ma Zhanhong, et al. Effects of Fe2O3 concentration on microstructures and properties of SiC-based ceramic foams [J]. Mater Sci Eng, A, 2009, 515: 113–116.
[3]  ? 步文博, 丘泰, 徐洁. AlN-SiC复相材料的制备及其微波衰减性能[J]. 硅酸盐学报, 2003, 31(9): 828–831.
[4]  BU Wenbo, QIU Tai, XU Jie. J Chin Ceram Soc, 2003, 31(9): 828– 831.
[5]  ? ZHANG F C, LUO H H, Roberts S G. Mechanical properties and microstructure of Al2O3-mullite Composite [J]. J Mater Sci, 2007, 42: 6798–6802.
[6]  ? Du?an Galusek, Róbert Klement, et al. Al2O3-SiC composites prepared by infiltration of pre-sintered alumina with a poly(allyl)carbo- silane [J]. J Eur Ceram Soc, 2011, 31: 111–119.
[7]  ? Ma Jingmei, Ye Feng, Liu Limeng, et al. Processing and microstructure characterization of liquid-phase-sintered, α-SiC matrix composites [J]. J Alloy Compd, 2010, 493: L15–L18.
[8]  ? Zawrah M F, Shaw Leon. Liquid-phase sintering of SiC in presence of CaO [J]. Ceram Int, 2004, 30: 721–725.
[9]  ? Can A, Herrmann M, McLachlan D S, et al. Densification of liquid phase sintered silicon carbide [J]. J Eur Ceram Soc, 2006, 26: 1707–1713.
[10]  ? Andrei Kirianov, Akira Yamaguchi. Sintering and oxidation resistance of compositions in the SiC–La2O3–Al2O3–Cr2O3 system [J]. Ceram Int, 2000, 26: 441–446.
[11]  ? 朱玉梅, 靳正国. 预氧化在SiC基陶瓷材料烧结中的作用[J]. 天津大学学报, 2006, 36(6): 769–772.
[12]  ZHU Yumei, JIN Zhengguo. J Univ Tianjin, 2006, 36(6): 769–772.
[13]  ? 翁润生. 工业岩石学[M]. 武汉: 中国地质大学出版社, 1990: 23–24.
[14]  

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