摘要
为了研制新型轻质、低膨胀系数的复合材料,以玻璃为基质材料,根据复合材料混合法则,将β-锂霞石、多晶莫来石纤维和玻璃粉按一定比例球磨混合后,经冷等静压压制后,采用高温真空烧结的方法,制备了含锂霞石和莫来石纤维的玻璃基复合材料。通过对其表观形貌、显微结构、维氏硬度、膨胀系数进行测试,重点研究了纤维含量、纤维长径比、烧结温度对复合材料性能致密度、机械性能、膨胀系数的影响。结果表明,当纤维含量为18%(质量分数)时,材料的维氏硬度最高;当纤维含量为10%(质量分数),长径比为31,800 ℃真空烧结5 h后,复合材料在在150~400 ℃范围内的平均线膨胀系数为1.67×10^-6/K(<2×10^-6/K),是一种潜在的轻质、低膨胀复合材料。
According to the rule of mixture, glass-based composites containing β-eucryptite and mullite fibers were prepared by ball milling, cold isostatic pressing and high temperature vacuum sintering. The effects of fiber content, fiber length-diameter ratio and sintering temperature on the density, Vickers hardness and expansion coefficient of the composites were studied. The results show that composite exhibited high Vickers hardness value with a fiber content of 18wt%. Low expansion coefficient of 1.67×10^-6/K (150-400 ℃) could be obtained when the content of fiber was 10wt%, ratio of length to diameter was 31, and the vacuum sintering temperature was 800 ℃ for 5 h.
作者
薛耀辉
张辉
李毅
周亚西
李晓
文昌秀
许彦涛
郑瑞林
郭海涛
崔晓霞
XUE Yaohui;ZHANG Hui;LI Yi;ZHOU Yaxi;LI Xiao;WEN Changxiu;XU Yantao;ZHENG Ruilin;GUO Haitao;CUI Xiaoxia(Xi’an Modern Control Technology Research institute, Xi’an 710065, China;State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Xi’an 710119, China;College of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China)
出处
《功能材料》
EI
CAS
CSCD
北大核心
2019年第12期12190-12195,共6页
Journal of Functional Materials
基金
国家自然科学基金委面上资助项目(61475189)
关键词
β-锂霞石
复合材料
玻璃
低膨胀系数
轻质
β-eucryptite
composite
glass
low thermal expansion coefficients
light
