Al-Si-C-N系組成物の焼結に及ぼす炭素の影響

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The composite in Al_4SiC_4-AlN and Al_4SiC_4-AlN-C system were sintered by a spark plasma sintering method. The powders of metal Al, Si and carbon black and AlN as starting materials were mixed. The mixture was calcined at 1300℃ and sintered at 1600° to 1800℃ by spark plasma sintering. Shrinkage during sintering, density, microstructure and phase of sintered bodies were measured. X-ray diffraction analysis gave Al_5SiC_4N (15R) and AlN (2H) phases in the bodies sintered at 1750℃. Densification did not occur in some composition in 50 to 80% AlN of the system Al_4SiC_4-AlN, but their densification was accelerated by addition of carbon. By the analysis of shrinkage during sintering and SEM observation of microstructure, the grain of Al_5SiC_4N (15R) and AlN (2H) grew, and pore exclusion was obstructed in the system Al_4SiC_4-AlN, though the grain did not grow, and pore exclusion was accelerated in the system Al_4SiC_4-AlN-C.
社団法人日本セラミックス協会の論文
2007-04-01