以聚硼硅氮烷(PBSZ)为先驱体,经熔融纺丝、不熔化以及在氨气气氛中高温裂解制备了Si-B-N纤维,然后在高纯氮气保护下加热至超高温.利用元素分析、FTIR、XRD、SEM、力学性能分析和波导法等研究了纤维的耐超高温性能.结果表明:Si-B-N纤维1 500℃退火几乎不失重,在惰性气体中非晶状态可以保持至1 700℃,加热到1 850℃才形成Si3N4和BN等结晶相;Si-B-N纤维的拉伸强度为1.72 GPa,弹性模量为196 GPa,1 500℃退火Si-B-N纤维的拉伸强度为1.86 GPa,弹性模量为205 GPa,Si-B-N纤维具有很好的耐超高温性能;此外,采用波导法测量,Si-B-N纤维表现出优良的介电性能,测试频率为8～12 GHz,1 400℃退火的Si-B-N纤维平均介电常数和介电损耗角正切值分别为约3.68和0.001 1.
参考文献
| [1] | Feng Cao;Zhenyu Fang;Changrui Zhang.High-temperature properties and associated structure evolution of continuous SiNO fiber-reinforced BN composites for wave transparency[J].Materials & design,2013Jan.(Jan.):258-263. |
| [2] | Liu, K.;Zhang, C.;Xiao, Y.;Cao, F.;Wang, S.;Li, B..Synthesis of Si_3N_4-BN composites using borazine as the precursor[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2013:48-50. |
| [3] | 唐云;王军;李效东;李文华;王小宙;王浩.先驱体转化法制备高性能Si-B-N陶瓷纤维[J].化学学报,2009(23):2750-2754. |
| [4] | 李仲平.防热复合材料发展与展望[J].复合材料学报,2011(02):1-9. |
| [5] | 余娟丽;李森;吕毅;张天翔;赵英民.先驱体浸渍-裂解法制备SiBN纤维增强SiBN陶瓷基复合材料[J].复合材料学报,2015(2):484-490. |
| [6] | Yang Li;Jiacheng Gao.Preparation of silicon nitride ceramic fibers from polycarbosilane fibers by γ-ray irradiation curing[J].Materials Letters,2013Nov.1(Nov.1):102-104. |
| [7] | 于栋利;何巨龙;田永君.BN纤维氮化中晶体结构演化过程的研究[J].复合材料学报,2000(4):26. |
| [8] | Yongpeng Lei;Yingde Wang;Jingen Xue;Yongcai Song.Influence of pyrolysis conditions on fabrication of polymer-derived BN fiber for wave transparent application[J].Composites, Part B. Engineering,2013Aug.(Aug.):254-259. |
| [9] | Laura Gottardo;Samuel Bernard;Christel Gervais.Study of the intermediate pyrolysis steps and mechanism identification of polymer-derived SiBCN ceramics[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,201234(34):17923-17933. |
| [10] | YuQing Peng;KeQing Han;Xi Zhao.Large-scale preparation of SiBN ceramic fibres from a single source precursor[J].CERAMICS INTERNATIONAL,20143(3):4797-4804. |
| [11] | Dusan Galusek;Stefan Reschke.In-Situ Carbon Content Adjustment in Polysilazane Derived Amorphous SiCN Bulk Ceramics[J].Journal of the European Ceramic Society,199910(10):1911-1921. |
| [12] | 唐云;王军;李文华;王浩;李效东;商遥.先驱体转化法制备SiBNC陶瓷[J].稀有金属材料与工程,2008(z1):477-480. |
| [13] | van Wullen L.;Jansen M..Random inorganic networks: a novel class of high-performance ceramics[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,20011(1):223-229. |
| [14] | P. A. Ramakrishnan;Y. T. Wang;D. Balzar;Linan An;C. Haluschka;R. Riedel;A. M. Hermann.Silicoboron-carbonitride ceramics: A class of high-temperature, dopable electronic materials[J].Applied physics letters,200120(20):3076-3078. |
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