ScholarLens Back to search
2002•Acta Aeronautica Et Astronautica SinicaRequires access

INFLUENCE OF HIGH TEMPERATURE TREATMENT ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF 2D-C/C COMPOSITES PREPARED BY LIQUID-VAPORIZED PROCESSING

Sun Wan

Open publisher page 0 citations

Abstract

D\|C/C composites fabricated by a rapid densification process-Liquid\|Vaporized CVI were heat treated at various high temperatures. The microstructural change and graphitability of the pyrocarbon matrix were studied with X\|ray diffraction (XRD) technology; changes in mechanical properties and fracture behaviour were correlated with scanning electron microscopy (SEM) observations of fracture surfaces, fiber and matrix microstructures, and fiber/matrix interfacial structures. It was confirmed from XRD that the interlaminar distance of (002) planes (d 002 ) decreased from 3.501to 3.376; the microcrystalline stack height (L c ) increased; flexural strength was found to decrease drastically, while interlaminar shear strength (ILSS) to increase obviously after graphitization, and at the same time, the fracture toughness to increase.

About this research paper

What this paper is about

D\|C/C composites fabricated by a rapid densification process-Liquid\|Vaporized CVI were heat treated at various high temperatures. The microstructural change and graphitability of the pyrocarbon matrix were studied with X\|ray diffraction (XRD) technology; changes in mechanical properties and fracture behaviour were correlated with scanning electron microscopy (SEM) observations of fracture surfaces, fiber and matrix microstructures, and fiber/matrix interfacial structures. It was confirmed from XRD that the interlaminar distance of (002) planes (d 002 ) decreased from 3.501to 3.376; the microcrystalline stack height (L c ) increased; flexural strength was found to decrease drastically, while interlaminar shear strength (ILSS) to increase obviously after graphitization, and at the same time, the fracture toughness to increase.

Why it matters

A significance statement is not available in the OpenAlex record.

Key contribution

A contribution statement is not available in the OpenAlex record.

Method / approach

Method details are not available in the OpenAlex metadata.

Main findings

Findings are not separately available in the OpenAlex metadata.

Limitations

Limitations are not available in the OpenAlex metadata.

Applications

Application details are not available in the OpenAlex metadata.

Available abstract

D\|C/C composites fabricated by a rapid densification process-Liquid\|Vaporized CVI were heat treated at various high temperatures. The microstructural change and graphitability of the pyrocarbon matrix were studied with X\|ray diffraction (XRD) technology; changes in mechanical properties and fracture behaviour were correlated with scanning electron microscopy (SEM) observations of fracture surfaces, fiber and matrix microstructures, and fiber/matrix interfacial structures. It was confirmed from XRD that the interlaminar distance of (002) planes (d 002 ) decreased from 3.501to 3.376; the microcrystalline stack height (L c ) increased; flexural strength was found to decrease drastically, while interlaminar shear strength (ILSS) to increase obviously after graphitization, and at the same time, the fracture toughness to increase.

Key concepts: Materials science, Microstructure, Composite material, Flexural strength, Scanning electron microscope, Fracture toughness, Microcrystalline, Fiber

Related papers

Related paper 1Related paper 2Related paper 3
Back to paper searchBrowse research topicsOriginal source
INFLUENCE OF HIGH TEMPERATURE TREATMENT ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF 2D-C/C COMPOSITES PREPARED BY LIQUID-VAPORIZED PROCESSING — Research Paper | ScholarLens