通过TG/DSC和高温XRD对石英纤维的高温相转变行为进行了研究,通过高分辨SEM对经不同温度处理过的石英纤维的表面形貌进行了研究,并用抗拉强度实验机测量了这些石英纤维的抗拉强度.研究结果表明,低于1000℃处理的石英纤维热损伤可分为两个阶段:(1)在低于600℃的热处理温度范围内,由于石英纤维表面处理剂的挥发,石英纤维直径逐渐减小,原来表面的裂纹、条状和圆形凸起等缺陷逐渐显露出来,导致石英纤维抗拉强度缓慢降低;(2)在600～1000℃的热处理温度范围内,石英纤维表面处理剂挥发完毕,在热处理的升降温过程中,由于热应力的作用,表面的条状和圆形凸起开始剥落,造成一定数量的新的表面裂口和裂纹缺陷.温度越高,石英纤维表面的条状和圆形凸起剥落现象越明显,这是造成这一温度条件下石英纤维强度显著降低的主要因素之一.此外,结合TG/DSC和XRD的研究结果,石英纤维低于1000℃热处理后,虽然没有明显的相变化,但是晶体结构有序化程度提高,表面开始析出?方石英并导致纤维表面形成一定数量的凸起缺陷,这也是导致高温处理后石英纤维热损伤的原因之一.
参考文献
| [1] | 陈虹,张联盟,李勇,等.三维编织SiO2基复合材料性能的研究[J].硅酸盐学报,2003,31(10):919-922.Chen Hong,Zhang Lianmeng,Li Yong,et al.Study on the property of three-dimensional SiO2 composites[J].Journal of the Chinese Ceramic Society,2003,31(10):919-922. |
| [2] | 李杰,许斌,冯志海.2.5D石英/酚醛复合材料的性能研究[J].宇航材料工艺,2002,32(1):35-37.Li Jie,Xu Bin,Feng Zhihai.Properties of 2.5D braided quartz/phenolic composites[J].Aerospace Materials and Technology,2002,32(1):35-37. |
| [3] | Chawla N,Tur Y K,Holmes J W,et al.High-frequency fatigue behavior of woven-fiber-fabric-reinforced polymer-derived ceramic-matrix composites[J].J Am Ceram Soc,1998,81(6):1221-1230. |
| [4] | Qi Gongjin,Zhang Changrui,Hu Haifeng,et al.Crystalliza-tion behavior of three-dimensional silica fiber reinforced silicon nitride composite[J].J Crystal Growth,2005,284 (1/2),293-296. |
| [5] | Wagstaff F E,Richards K J.Preparation and crystallization behavior of oxygen-deficient vitreous silica[J].J Am Ceram Soc,1965,48(7),382-383. |
| [6] | Li H,Tomozawa M,Lou V K.Effects of nitrogen and carbon ion implantation on devitrification of silica glasses[J].J Non-Crystalline Solid,1994,168 (1/2):56-63. |
| [7] | Bihuniak P P,Calabrese A,Erwin E.Effect of trace impurity levels on the viscosity of vitreous silica[J].J Am Ceram Soc,1983,66 (8):134-135. |
| [8] | Bihuniak P P.Effect of trace impurities on divitrification of vitreous silica[J].J Am Ceram Soc,1983,66(10):188-198. |
| [9] | Agarwal A,Tomozawa M.Correlation of silica glass proper-ties with the infrared spectra[J].J Non-Cryst Solids,1997,209(1/2):166-174. |
| [10] | Agarwal A,Tomozawa M.Surface and bulk structural relaxa-tion kinetics of silica glass[J].J Non-Cryst Solids,1997,209(3):264-272. |
| [11] | 温广武,雷廷权,周玉.不同形态石英玻璃的析晶动力学研究[J].材料科学与工艺,2001,9(1):1-5.Wen Guangwu,Lei Tingquan,Zhou Yu.Crystallization kinetics of different morphologies of fused silica glass[J].Materials Science & Technology,2001,9(1):1-5. |
| [12] | 邢建申,王树彬,张跃.石英纤维析晶行为[J].复合材料学报,2006,23(6):75-79.Xing Jianshen,Wang Shubin,Zhang Yue.Crystallization of quartz fiber[J].Acta Materiae Compositae Sinica,2006,23(6):75-79. |
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