Study on Microstructure Characteristics of Axially Braided Carbon/Carbon Composites Based on SEM and Micro-CT.

Chunguang Wang,Weikai Liu,Tao Zhu,Min Tang

doi:10.3390/ma13061414

Chunguang Wang, Weikai Liu + Show 2 more

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https://doi.org/10.3390/ma13061414

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Journal: Materials	Publication Date: Mar 20, 2020
Citations: 10	License type: CC BY 4.0

Affiliation: Shaanxi University of Science and Technology

Abstract

In order to study the microstructure characteristics of an axially braided Carbon/Carbon (C/C) composite, a comprehensive observation and study of the mesoscopic and microstructure characteristics of an axially braided C/C composite is conducted. Scanning electron microscopy and Micro-CT were used to obtain the microstructure characteristics and distribution rules of the axially braided C/C composite material. The physical model of the material and the geometric model of the representative unit were established. At the same time, the characteristics of this kind of material are also obtained. The microstructure characteristics show that the axially braided C/C composite is a polymer with cracks and pores of different sizes, which is a three-dimensional and four-directions carbon fiber braided body as the reinforcing phase and pitch carbon as the reinforcing matrix. The microcosmic data obtained in this chapter is the basis for carrying out material property prediction and qualitative comparison of macro performance.

Highlights

The Carbon/Carbon (C/C) composite material, namely carbon fiber reinforced carbon matrix composite material, is a structural composite material with a reinforcing property and a matrix phase composed of pure carbon with special properties developed in the late 1950s [1,2]
Many scholars have used a variety of different testing methods, testing equipment and analysis methods to study the micro-structure of C/C composite materials
The physical model can be cut at any position to structure is shown in Figure 12, and the analysis shows that the interface has a porosity between 0.254 obtain the microstructure characteristics of any part inside the composite material

Summary

Introduction

The Carbon/Carbon (C/C) composite material, namely carbon fiber reinforced carbon matrix composite material, is a structural composite material with a reinforcing property and a matrix phase composed of pure carbon with special properties developed in the late 1950s [1,2] It has a series of excellent properties such as high specific strength, good thermal stability, abrasion resistance, and anti-ablation, especially its mechanical properties. For the strength of this material does not decrease with the increase of temperature, so it has been widely used in aviation and aerospace 18 [3,4] Because it is a cross-scale structural material, the micromechanical characteristics of the material are the basis for studying the macroscopic properties of the material. The crack growth of C/C composites under load conditions can be observed in real time with a scanning electron microscope [7]

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Conclusion