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Carbon foam with relatively high compressive strength and suitable thermal conductivity was prepared from mixtures of mesocarbon microbeads (MCMBs) and mesophase pitch, followed by foaming, carbonization and graphitization. The influence of addition amount of MCMB on the properties of as-prepared carbon foams was investigated in detail. Results showed that addition of MCMBs into mesophase pitch could...
Mesocarbon microbeads were molded at different pressures, and then heat-treated. The resulting carbonized/graphitized blocks were evaluated in terms of physical properties and textures to determine their potential as seal materials. In order to seek optimum technical conditions, different molding pressure and heat treatment temperatures (HTT) were investigated. Results indicated that the bulk density...
Fine-grain and coarse/fine-grain pitch-derived ZrC/C composites were prepared by a hot-pressing method. Their ablation resistance was tested in an oxyacetylene flame with high velocity gas. The effects of the Zr content and the dimension of particles in the composites on the ablation were studied. Results indicated that for the fine-grain composite, a dense and uniform ZrO 2 film could be...
Ti doped and Si-Ti doped graphites have been developed. The influence of the dopants on the properties and microstructure of doped graphites was analyzed. Test results reveal that Ti doped graphite has excellent bending strength and high thermal conductivity, with highest values reaching 50.2 MPa and 424 Wm -1 K -1 for a Ti concentration of 15 wt% in the raw materials. Si...
Fine-grained B 4 C-SiC/C composites were fabricated using a ball-milling dispersion process. The oxidation behaviors of both fine-grained B 4 C-SiC/C composites and coarse-grained B 4 C-SiC/C composites at temperatures of up to 1400 o C were analyzed by the differential thermal analysis technique, and the surface morphology of the composites after isothermal oxidation...
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