A high-temperature ceramics-based composite exhibits superior heat and oxidation resistance and frictional properties. The material comprises a dense carbon-fiber-reinforced SiC-infiltrated composite or a dense SiC-infiltrated composite with granular carbon dispersed. It shows excellent machineability and frictional properties. Its high oxidation resistance allows use at 1800°C or higher. The material can be effectively used for areas requiring high heat resistance and high mechanical strength and reliability.
A superconductive magnetic levitation transportation system performs short to long distance transport of cargo such as mail and foods. The transportation vehicle is levitated on the magnetic levitation guide at the stable floated position, with the binding force by the pinning effect of the superconductor. The vehicle travels at high speed in the vacuum transportation passage by potential energy induced by the level difference between the start and the destination locations. Since external driving power is not needed and there is almost no pollution, the transportation system can help save energy and solve environmental problems.
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