| 摘要 |
PURPOSE:To improve the oxidation resistance of the SN plate by adding carbon fibers of a specific diameter and length, boron carbide and chromium carbide, respectively at specific parts wt., and a binder to the compd. of alumina aggregate, carbon and fine metallic powder, then kneading, molding the mixture and heat treating the molding at a specific temp. CONSTITUTION:The carbonaceous fibers having <=0.2mm diameter and 1 to 1mm length are added at 0.5 to 3 pts.wt., the boron carbide at 0.5 to 3 pts.wt. and the chromium carbide at 0.5 to 10 pts.wt. and phenol resin or pitch as the binder to the compd. contg. the alumina as the refractory aggregate and consisting of the others, such as carbon and fine metallic powder. The mixture composed thereof is kneaded and molded and the molding is heat treated at <=700 deg.C. The powder of a silicone resin having <=1mm grain size is added at 1 to 10 pts.wt. to this molding. The durability of the SN plate is enhanced in this way. |
