Evolution of Porous Structure and Fatigue Behavior of C/C Composites

Liao, Xiao; Xu, Wen Feng; Li, He Jun

doi:10.4028/www.scientific.net/kem.324-325.599

Cited by 4 publications

(5 citation statements)

References 16 publications

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“…The results indicated that the critical reaction temperature between W and C was 1200°C. C/C composites were composed of the carbon fiber, pyrolytic carbon matrix with a lamination microstructure, and 4-6 vol.% pores resulting from the preparation method of chemical vapor infiltration [17,18]. In general, the atoms on a void surface diffuse from high chemical potential regions to low chemical potential region, which causes the void to change its shape or drift along the metal line.…”

Section: Methodsmentioning

confidence: 99%

Effect of heat-treatment at different temperatures on the phase and morphology of the surface of W-coated C/C composites

Chen

Zhang

Wang

et al. 2009

Journal of Nuclear Materials

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Section: Methodsmentioning

confidence: 99%

Effect of heat-treatment at different temperatures on the phase and morphology of the surface of W-coated C/C composites

Chen

Zhang

Wang

et al. 2009

Journal of Nuclear Materials

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“…In the rectangular waveguide as shown in Fig. 2, the input impedence in the face of sample away from the short circuit board is L Z , the waveguide is filled with air, which can be regarded as lossless transmission line, meanwhile j γ β = , taking these parameters into the expression (2) can get the load impedence as follows [4]:…”

Section: Samplementioning

confidence: 99%

Research and Manufacture of Microwave Material Automatic Measurement System of Slotted Line

Cui

et al. 2016

KEM

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In this paper we designed a microwave material measurement system by using slotted line waveguide.Compared with the VNA,this system have the smaller size and lower cost.Considering the test technical specifications, test methods of complex permittivity of microwave materials, and the performance of test system,we used the short-circuited line method to test the complex permittivity of the microwave material, and used the TI DSP [1] (TMS320C6747) as a minimum core processor system. Developed a set of X-band automatic slotted line system, this paper carried out the design of the prototype test system and the programing of the system's automated testing software. Finally,we used the measuring system to test two kinds of sample(fiberglass and quartz) and compare the result with the other result testing by the VNA.it is not difficult to conclude the measured result is relatively accurate.

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“…19,20 The laminative pyrolytic carbon was beneficial to the diffusion of W element toward the interior of the C/C composite substrate. Figure 8 shows SEM micrograph and EDS spectrum of the cross section of W-coated C/C composite after heat treatment.…”

Section: Experimental Processmentioning

confidence: 99%

Effect of heat treatment at 1300°C on W coating prepared by double-glow plasma on carbon/carbon composite

et al. 2008

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W-coated carbon/carbon composite has been considered as an attractive ITER plasma facing material in fusion devices. In this paper, W coating was prepared on the carbon/carbon composite substrate by double-glow plasma method using pure W as target. Argon was input into the chamber as the plasma and the reactive gas. W-coated carbon/carbon composite was heat-treated in vacuum furnace at 1300°C for 1 h. Phase and microstructure of W coating were examined by X-ray diffraction and scanning electron microscopy, respectively. The chemical composition of W coating was analyzed by energy dispersive spectroscopy. The micro-hardness of the W coating was estimated by nano-indentation instrument. The results indicated that a continuous and dense W-modified layer could be successfully coated on the carbon/carbon composite surface by double-glow plasma method. W coating completely reacted with C to form WC at 1300°C. WC almost completely diffused into the carbon/carbon composite after heat treatment. The great decrease in elemental W on the carbon/carbon composite surface after heat treatment led to a significant reduction in micro-hardness.

show abstract

Evolution of Porous Structure and Fatigue Behavior of C/C Composites

Cited by 4 publications

References 16 publications

Effect of heat-treatment at different temperatures on the phase and morphology of the surface of W-coated C/C composites

Effect of heat-treatment at different temperatures on the phase and morphology of the surface of W-coated C/C composites

Research and Manufacture of Microwave Material Automatic Measurement System of Slotted Line

Effect of heat treatment at 1300°C on W coating prepared by double-glow plasma on carbon/carbon composite

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