苎麻纤维织物SiC陶瓷的制备与研究

发布时间：2018-05-11 08:48

  本文选题：生物SiC陶瓷 + 苎麻纤维　； 参考：《西安工程大学》2015年硕士论文

【摘要】：近年来随着科技的发展,生物Si C陶瓷受到了越来越多研究人员的关注。这是因为生物Si C陶瓷具有高气孔率、耐摩擦、耐腐蚀以及良好的化学稳定性等优点。制备生物Si C陶瓷的原料来源非常广泛,可利用自然界中的竹材、木材、高粱、小米以及经过人工加工的纸张、单纤维板等材料,广泛的原料来源使得制备生物Si C陶瓷的成本非常低廉。本文从低成本、合理利用自然资源以及环境保护的角度出发。利用在我国有着丰富含量的苎麻纤维为原料,在高温真空环境下制备出具有苎麻纤维织物组织的Si C陶瓷,本文研究了成型温度以及烧结助剂对所制备样品成型的影响。测试了样品的各项物理性能,并且利用X射线衍射仪、扫描电子显微镜和EDS能谱分析仪对样品的物相组成以及微观组织结构进行了深入研究与分析。通过分析可知在真空环境下制备的苎麻纤维织物Si C陶瓷,随着成型温度的上升显气孔率逐渐增大,样品密度逐渐减小,抗弯强度逐渐减小。通过实验制得样品的主晶相为β-Si C,很好的保留了苎麻纤维织物的微观形貌。随着温度上升苎麻纤维织物Si C陶瓷中杂质的含量逐渐减少,纤维之间的填充物逐渐减少,同时从形貌上可以看出在1500℃下Si C形貌更为圆润。经过HF腐蚀之后的样品,剩下较为纯净的Si C陶瓷,杂质成分基本被除去。在掺杂烧结助剂后制备的苎麻纤维织物Si C陶瓷未检测到杂质成分,通过测试分析可知添加了Al2O3-Y2O3-Mg O时样品的致密性、抗弯强度及微观形貌最为良好。通过对实验样品的测试分析可知,在制备工艺相同的情况下1500℃时杂质成分最少,所形成的Si C晶粒形貌最为良好。在相同温度下添加烧结助剂的样品性能更为良好,且多元烧结助剂的效果优于二元烧结助剂。
[Abstract]:In recent years, with the development of science and technology, more and more researchers pay attention to biological sic ceramics. This is due to the high porosity, friction resistance, corrosion resistance and good chemical stability of bioceramics. Biological sic ceramics can be made from a wide range of raw materials, such as bamboo, wood, sorghum, millet, artificial paper, single fiberboard and so on. A wide range of raw materials make the cost of preparing biological sic ceramics very low. This article starts from the angle of low cost, rational utilization of natural resources and environmental protection. Using Ramie fiber with abundant content as raw material, sic ceramics with Ramie fabric structure were prepared in high temperature and vacuum environment. The effects of molding temperature and sintering aids on the molding of the samples were studied in this paper. The physical properties of the samples were tested, and the phase composition and microstructure of the samples were studied and analyzed by X-ray diffractometer, scanning electron microscope and EDS spectrometer. The results show that the porosity, density and bending strength of Ramie fabric sic ceramics prepared in vacuum environment gradually increase with the increase of molding temperature. The main crystal phase of the sample was 尾 -Si C, which retained the microstructure of Ramie fabric. With the increase of temperature, the content of impurities in sic ceramics of Ramie fiber fabric decreases gradually, and the fillers between fibers decrease gradually. At the same time, it can be seen from the morphology that the morphology of sic is more rounded at 1500 鈩，

本文编号：1873278