| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a silicon carbide-based heat-resistant ultra lightweight porous material having the shape of a spongy porous body and a method of easily manufacturing the same. <P>SOLUTION: Slurry containing silicon powder and a resin is applied to the framework of the spongy porous structural body by an impregnation method in such a manner that interconnected pores of the porous body are not plugged with the slurry and the resulting porous structural body is carbonized at a temperature of 900-1350°C in vacuum or in an inert atmosphere. The resulting carbonized porous structural body is subjected to reactive sintering at a temperature of ≥1350°C in vacuum or in an inert atmosphere, whereby silicon carbide having high wettability to molten silicon is produced and open pores due to a volume reduction reaction are formed in one step. The molten silicon is inpregnated into the resulting porous structural body at a temperature of 1300-1800°C in vacuum or in an inert atmosphere, whereby the silicon carbide-based heat-resistant, ultra lightweight, porous structural material is produced. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
