S042034 不連続繊維強化セラミック複合材料の作製および機械的特性の評価([S04203]セラミックスおよびセラミックス系複合材料(3))

概要

論文の詳細を見る
40 vol% SiC whisker reinforced alumina matrix composites (SiCw/Al_2O_3) were fabricated using a spark plasma sintering (SPS) technique. In this study, to decrease the thermal mismatch between SiCw and Al_2O_3, SiC particle (SiCp) was added into Al203 matrix (SiCw/SiCp/Al_2O_3). The relative density of the fabricated specimens was more than 99%, so that the sufficient densification was accomplished. Then, the mechanical properties and fracture morphology were examined. It was found that the mechanical properties of composites were increased from the monolithic Al203 and SiCw/Al_2O_3 composites. SEM observation of fracture surface after bending test showed that the amount of pull-out SiCw and the pull-out length in SiCw/SiCp/Al_2O_3 composites was larger than SiCw/Al_2O_3 composites. Therefore, the interfacial shear strength was successfully reduced due to SiCp addition. Consequently, it was suggested that the improvement of mechanical properties of SiCw/SiCp/Al_2O_3 composites may be accomplished by optimizing the interfacial shear strength due to SiCp addition.
一般社団法人日本機械学会の論文
2011-09-11