1.5m量级SiC陶瓷素坯凝胶注模成型工艺

张舸

doi:10.3788/OPE.20132112.2989

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1.5m量级SiC陶瓷素坯凝胶注模成型工艺

现代应用光学 | 更新时间：2020-08-12

- 1.5m量级SiC陶瓷素坯凝胶注模成型工艺
- Gelcasting process of 1.5 m SiC ceramic green body
- 光学精密工程 2013年21卷第12期页码：2989-2993
- 作者机构：
  
  中国科学院长春光学精密机械与物理研究所光学系统先进制造技术中国科学院重点实验室,吉林长春 130033
- 作者简介：
  
  [ "张舸（1980-），男，重庆荣昌人，副研究员，主要从事空间用轻型碳化硅反射镜制备技术的研究。" ]
- 基金信息：
- DOI：10.3788/OPE.20132112.2989
  中图分类号： TH703;TQ174.6
- 收稿日期：2013-07-30，
  
  修回日期：2013-09-25，
  
  网络出版日期：2013-12-25，
  
  纸质出版日期：2013-12-25
- 稿件说明：
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张舸. 1.5m量级SiC陶瓷素坯凝胶注模成型工艺[J]. 光学精密工程, 2013,21(12): 2989-2993

ZHANG Ge. Gelcasting process of 1.5 m SiC ceramic green body[J]. Editorial Office of Optics and Precision Engineering, 2013,21(12): 2989-2993
张舸. 1.5m量级SiC陶瓷素坯凝胶注模成型工艺[J]. 光学精密工程, 2013,21(12): 2989-2993 DOI： 10.3788/OPE.20132112.2989.

ZHANG Ge. Gelcasting process of 1.5 m SiC ceramic green body[J]. Editorial Office of Optics and Precision Engineering, 2013,21(12): 2989-2993 DOI： 10.3788/OPE.20132112.2989.

摘要

利用凝胶注模成型工艺制备了1.5 m量级轻型碳化硅（SiC）陶瓷素坯。研究了颗粒级配、固相含量、混料时间对碳化硅浆料性能的影响。测试了SiC脱脂素坯的显微结构、力学性能和最终烧结体的机械性能和热学性能。结果表明：在最佳分散条件下，通过合理的颗粒级配，成功制备得到了固相含量高达65%，流动性良好的SiC陶瓷浆料。另外，随着固相含量的增加，SiC陶瓷浆料黏度急剧增大；随着混料时间的延长，浆料黏度出现先降低后升高的现象。将制备得到的浆料注入模具后，得到了1.5 m量级的SiC陶瓷素坯，脱脂后的素坯内部结构均匀抗弯强度为24.6 MPa。

Abstract

A 1.5 m silicon carbide(SiC) ceramic green body with a lightweight structure was prepared by gel casting method. The effects of Particle Size Distribution （PSD）

solid loading and milling time on the SiC suspension were studied systematically. Then the microstructure and bending strength of the SiC green body

and the mechanical and thermal properties of Reaction Bonded SiC(RBSiC) were measured. The results show that the 65% solid loading SiC slurry with good flow properties is prepared by optimum PSD in a stable dispersion condition. The slurry viscosity of SiC increases rapidly with the solid loading.However

the apparent viscosity of SiC slurry reduces and then increases with the milling time. Moreover

the SiC slurry was injected into a mould

and a 1.5 m SiC ceramic green body was obtained.The ceramic green body after degreasing has a uniform interior structure and a bending strength of 24.6 MPa.

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references

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