耐火材料 ›› 2021, Vol. 55 ›› Issue (6): 487-490.DOI: 10.3969/j.issn.1001-1935.2021.06.006

• 研究开发 • 上一篇    下一篇

保温时间对SiC-TiC复合粉末物相组成和显微结构的影响

刘鑫(), 胡继林(), 朱凌, 田修营, 彭秧锡   

  1. 湖南人文科技学院材料与环境工程学院 精细陶瓷与粉体材料湖南省重点实验室 湖南娄底 417000
  • 收稿日期:2021-02-02 出版日期:2021-12-15 发布日期:2021-12-10
  • 通讯作者: 胡继林,男,1978年生,博士,教授。E-mail: hujilin@126.com
  • 作者简介:刘鑫:男,1973年生,硕士,副教授。E-mail: zzhliuxin@163.com
  • 基金资助:
    湖南省科技计划项目(2016TP1028)

Effect of holding time on phase composition and microstructure of SiC-TiC composite powder

Liu Xin(), Hu Jilin(), Zhu Ling, Tian Xiuying, Peng Yangxi   

  1. Hunan Provincial Key Laboratory of Fine Ceramics and Powder Materials,School of Materials and Environmental Engineering,Hunan University of Humanities,Science and Technology,Loudi 417000,Hunan,China
  • Received:2021-02-02 Online:2021-12-15 Published:2021-12-10
  • Contact: Hu Jilin

摘要:

以硅溶胶、淀粉和TiO2为初始原料,采用碳热还原法于1 550 ℃保温不同时间制备了SiC-TiC复合粉末。采用XRD、SEM、EDS探讨了保温时间(1、2和3 h)对合成粉末的物相组成和显微结构的影响。结果表明:所合成的SiC-TiC复合粉末在1 550 ℃保温2 h后合成反应已进行较为完全,合成粉末中除了生成一定量的片状颗粒和大量近似球状颗粒(粒径约在50~100 nm)外,还存在一定量的大小均匀且细长的直径约为50~100 nm 的以SiC为主的晶须。

关键词: 淀粉, 碳热还原法, SiC-TiC复合粉末, 显微结构

Abstract:

SiC-TiC composite powders were prepared at 1 550 ℃ for different durations by the carbothermic reduction method,using silica sol,starch and TiO2 as the starting materials.The influences of the holding time (1 h,2 h and 3 h) on the phase composition and the microstructure of the synthesized powders were discussed by XRD,SEM and EDS.The results show that the synthesis reaction of the SiC-TiC composite powder at 1 550 ℃ for 2 h is relatively complete.In addition to a certain amount of flake particles and many approximately spherical particles (with particle diameter of 50-100 nm),some SiC-based whiskers with uniform sizes and the diameter of 50-100 nm exist.

Key words: starch, carbothermal reduction method, silicon carbide-titanium carbide composite powder, microstructure

中图分类号: