硅酸盐通报2025，Vol.44Issue(1)：321-331,11.DOI:10.16552/j.cnki.issn1001-1625.2024.0779
莫来石晶须增强硅酸铝纤维复合材料的制备与性能研究
Preparation and Properties of Mullite Whisker Reinforced Aluminum Silicate Fiber Composites
摘要
Abstract
In this paper,a non-toxic and low-energy-consuming process for in-situ growth of mullite whiskers on the surface of aluminum silicate fiber was developed.Firstly,the thermophysical properties and morphology of mullite whisker reinforced aluminum silicate fiber composites were characterized,and the optimum heat treatment temperature for in-situ growth of mullite whiskers under borax fluxing was determined.Then,under the optimum heat treatment temperature,silica sol and aluminum nitrate were used as silicon source and aluminum source respectively,and borax was used as flux.The effects of flux concentration and holding time on whisker morphology,phase composition,density and compressive strength were analyzed.The results show that mullite whiskers with"thin needle shape"are successfully grown on the surface of aluminum silicate fiber under borax fluxing.The optimum conditions are as follows:heat treatment temperature 900 ℃,holding time 2 h,flux concentration 0.17 mol/L,silica sol concentration 0.17 mol/L,aluminum nitrate concentration 0.51 mol/L.The compressive deformation of mullite whisker reinforced aluminum silicate fiber can reach up to 60％,and the compression strength of this material can reach up to 0.462 MPa at 60％compression deformation.关键词
莫来石晶须/硅酸铝纤维/助熔剂/原位增强/力学性能/热物理性能Key words
mullite whisker/aluminum silicate fiber/flux/in-situ enhancement/mechanical property/thermophysical property分类
通用工业技术引用本文复制引用
马晓亮,汪桂根,张孟予,赵宝军,钟业盛,史丽萍,赫晓东..莫来石晶须增强硅酸铝纤维复合材料的制备与性能研究[J].硅酸盐通报,2025,44(1):321-331,11.基金项目
国家重点研发计划(2023YFC3806104) （2023YFC3806104）
特种环境复合材料技术国家级重点实验室基金(6142905232102) （6142905232102）
中国建筑国际集团科技研发项目(CSCI-2021-Z-8) （CSCI-2021-Z-8）
特种环境复合材料技术国家级重点实验室科学基金(JZKJW20230074-02) （JZKJW20230074-02）
