Thermophysical properties of carbon/carbon composites and physical mechanism of thermal expansion and thermal conductivity

Luo, Ruiying; Liu, Tao; Li, Jinsong; Zhang, Hongbo; Chen, Zhijun; Gao, Tian

doi:10.1016/j.carbon.2004.06.024

Cited by 174 publications

(60 citation statements)

References 8 publications

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“…Fig. 1(a) shows the micrograph of sample impacted at 25 , pores and cracks were detected throughout the surface of the specimen, due to the bottleneck pores during CVI process and the matrix cracks resulting from CTE mismatch of the fi ber and matrix [13,14] . For the specimen impacted at 800 , the specimen surface was relatively smooth without large pores and cracks.…”

Section: 1 M I C R O S T R U C T U R E E V O L U T I O N O F C / C mentioning

confidence: 99%

Effects of temperature induced thermal expansion and oxidation on the Charpy impact property of C/C composites

Yan

et al. 2015

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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C/C composites are the emerging materials of choice for aero-engine hot-end components that will bear impact loading in thermal-oxidizing environments. For the components run for extended periods, the safe operation of components depends on how to evaluate damages under a dynamic load. In this study, Charpy impact tests at a temperature range of 25 to 1 200 were carried out on C/C composites to verify the effects of temperature induced thermal expansion and oxidation on their impact performance. Below 800 , oxidation was negligible and composites expanding played a leading role, resulting in the remarkable increase in fi ber/ matrix interface strength and impact energy. However, when the temperature was above 800 , the release of CO or CO 2 due to oxidation resulted in a lower impact energy.

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Section: 1 M I C R O S T R U C T U R E E V O L U T I O N O F C / C mentioning

confidence: 99%

Effects of temperature induced thermal expansion and oxidation on the Charpy impact property of C/C composites

Yan

et al. 2015

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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“…The emitted heat let the calorimeter temperature go up to the terminal value T n , and by calculating the changes of temperature, the mean specific heat was obtained, and furthermore the real specific heat could also be achieved. [9] The whole experiment process was performed under a vacuum condition and the room temperature of 25 C, and the accuracy of the measurements is AE3%.…”

Section: Measurement Of Specific Heatmentioning

confidence: 99%

Densified Kinetics and Properties of Carbon Matrix Composites Reinforced with Carbon Nanotubes Prepared by Dielectrophoresis

Guan

Luo

2015

Adv Eng Mater

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A carbon nanotube (CNT) reinforced carbon/carbon composite fabricated using the dielectrophoresis and chemical vapor infiltration is described. CNT content is found to decrease with increasing frequency and has a strong influence on the temperature distribution along the thickness direction of the preforms. The density variation with position in the CNT-added preform at 500 Hz is the smallest (0.012 g cm À3 ), while the CNT-added preforms at 50 Hz and 5 000 Hz could not be densified efficiently. The flexural strength and modulus of the composite at 500 Hz are increased by nearly 12.2 and 19.7%, respectively, compared to that of the composite at DC 30 V.

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“…For C-C composite the vibration of the crystal lattice is the source of heat conduction. According to quantum theory, the crystal lattice vibration can be described by the phonon interaction 9 . Phonon interaction in the C-C composites is divided into 3 types:…”

Section: Thermal Diffusivitymentioning

confidence: 99%

Development and Evaluation of Carbon-Carbon Threaded Fasteners for High Temperature Applications

Kushwaha

Sinnur

2012

DSJ

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Carbon-Carbon (C-C) threaded fasteners have been developed for joining C-C composites experiencing temperature above 1500 °C. The fasteners were fabricated from spun yarn graphitized carbon fabric through resin route and from needle punched carbon felt through pitch route techniques. The preforms were processed with multiple cycles of impregnation, carbonisation, and graphitisation up to densities of 1.78 gcm -3 and 1.90 gcm -3. Densification process cycles were repeated to obtain composites with reduced porosity and improved thermo-mechanical properties. Material evaluation of C-C fasteners is discussed and compared with existing graphite fasteners used in industrial and aerospace sectors. Scanning electron microscopy was also carried out to study microstructure of fractured specimens.

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Thermophysical properties of carbon/carbon composites and physical mechanism of thermal expansion and thermal conductivity

Cited by 174 publications

References 8 publications

Effects of temperature induced thermal expansion and oxidation on the Charpy impact property of C/C composites

Effects of temperature induced thermal expansion and oxidation on the Charpy impact property of C/C composites

Densified Kinetics and Properties of Carbon Matrix Composites Reinforced with Carbon Nanotubes Prepared by Dielectrophoresis

Development and Evaluation of Carbon-Carbon Threaded Fasteners for High Temperature Applications

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