ＳiCウィスカ•Al2O3粒子/6061アルミニウム合金複合材料の強化

Mixing law for expressing strength of composite materials reinforced by SiC whiskers and Al2O3 particles was investigated based on the results in tensile tests of them. It is found that the average length of SiC whiskers after extrusion is exponentially decreased with the increase in volume fraction of whisker. The regressive expression of the relationship between average length and volume fraction of whiskers is proposed. It is also found that a maximum value in the tensile strength of these materiales appears and varies as the strength and the volume fraction of whiskers and the strength of matrix. Therefore, an optimum combination of strength of whisker and matrix, and an optimum content ratio of whiskers and particles exist respectively.