Process and Properties of C/C Composites by Chemical Liquid-Vaporized Infiltration

李新涛; 李克智; 李贺军; 廖晓玲; 魏剑

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Process and Properties of C/C Composites by Chemical Liquid-Vaporized Infiltration

更新时间：2025-12-08

- Process and Properties of C/C Composites by Chemical Liquid-Vaporized Infiltration
- Vol. 41, Issue 5, Pages: 557-561(2007)
- 作者机构：
  
  西北工业大学材料学院,西安,710072
- 作者简介：
- 基金信息：
- DOI：
  CLC： TB332
- Online First：10 May 2007，
  
  Published：2007
- 稿件说明：
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李新涛, 李克智, 李贺军, et al. Process and Properties of C/C Composites by Chemical Liquid-Vaporized Infiltration[J]. 2007, 41(5): 557-561.
DOI：

李新涛, 李克智, 李贺军, et al. Process and Properties of C/C Composites by Chemical Liquid-Vaporized Infiltration[J]. 2007, 41(5): 557-561. DOI：

摘要

在不加和加入催化剂的条件下

采用化学液相气化沉积工艺分别在1000 ℃-10 h及900 ℃-8 h内制备出密度为1.67 g/cm

的大尺寸(110 mm×25 mm)C/C复合材料.不加催化剂制备的C/C复合材料主要以粗糙层为主

锥状结构明显

呈脆性断裂模式; 在加入催化剂的条件下

由于催化剂的存在能够增加C沉积时的形核点

降低C沉积温度

缩短沉积时间

所以制备的C/C复合材料均匀性增加

组织结构主要为光滑层和各向同性组织

断裂方式为台阶式假塑性断裂.热处理后两种材料的弯曲强度和模量都降低

石墨化度增加

而不加催化剂制备的复合材料的力学性能和石墨化度都高于加入催化剂条件下制备的复合材料.

Abstract

The large size of C/C composites(110 mm×25 mm)with a density of 1.67 g/cm

were fabricated by chemical liquid-vaporized infiltration with and without catalyst at 1000 ℃ for 10 h and 900 ℃ for 8 h

respectively. The C/C composite with catalyst consists of smooth laminar and isotropic pyrocarbon

and exposes a pseudo-plastic pattern with a rough step-like fracture surface morphology

while the C/C composite without catalyst exhibits cone-like rough laminar pyrocarbon

and presents brittle fracture. In the case of catalyst

the deposition temperature and period are reduced due to the increase of nucleation sites of carbon deposition. Both flexural strength and modulus decrease and graphitization degree increases by heat treatment. Compared to the C/C composite with c

atalyst

the higher mechanical properties and graphitization degree are found for the C/C composite without catalyst.

关键词

Keywords

references

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