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High Strength silicon carbide foams and Their Deformation Behavior

Journal of Materials Science & Technology 2006年第2期22卷 269-272页

作者： Chong TIAN Jinsong ZHANG Xiaoming CAO Qiang LIU Wanping HU Institute of Metal Research Chinese Academy of Sciences Shenyang 50016 China

silicon carbide （SIC） foams with a continuously connected open-cell structure were prepared and characterized for their mechanical performance. The apparent densities of SiC foams were controlled between about 0.4 and 2.3 g/cm^3, with corresponding compressive strengths ranging from about 23 to 60 MPa and flexural strengths from about 8 to 30 MPa. Compressive testing of the SiC foams yielded stress-strain curves with only one linear-elastic region, which is different from those reported on ceramic foams in literature. This can possibly be attributed to the existence of filaments with fine, dense and high strength microstructures. The SiC and the filaments respond homogeneously to applied loading.

关键词： silicon carbide foams Apparent density Strength Deformation behavior Linear-elastic behavior

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Hydrochlorination of Acetylene Using SiC Foam Supported Structured C/Au Catalysts

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Journal of Materials Science & Technology 2014年第5期30卷 434-440页

作者： Xiaodan Yang Chunhai Jiang Zhenming Yang Jinsong Zhang Institute of Metal Research Chinese Academy of Sciences

AuCl3 loaded structured catalysts were prepared on SiC foam supported with pre-coated activated carbon layers. The catalytic properties of the structured catalysts towards hydrochlorination of acetylene were tested in a fixed- bed reactor with the AuCl3 loaded on activated carbon pellets as a reference. For isopyknic catalysts, the structured catalyst with only one fifth of the Au amount as that was used on the reference catalyst exhibited even a little higher acetylene conversion and much better stability than the latter no matter what the gas hourly space velocities of acetylene were used. The results indicated that the more homogeneous distribution of AuCl3 particles and better heat transfer along the fixed-bed reactor originated from the low pressure drop and high thermal conductivity of the SiC foam supported structured catalysts might be able to account for their improved efficiency and stability. It is befieved that these novel structured C/Au catalysts can be potentially applied in VCM industrialization in view of their greatly reduced cost and much prolonged life.

关键词： Structured catalysts Acetylene hydrochlorination silicon carbide foams Carbon coating Heterogeneous reaction

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