ウイスカ強化アルミニウム複合材料の調製と機械的性質

概要

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The present paper deals with the preparation mechanical properties of three kings of whisker reinforced aluminum matrix composites (Si_3N_4/Al, SiC/Al and K_2O・6TiO_2/Al). The squeeze casting method was employed for the preparation, and the bending and tensile strengths, the elastic modulus and the identation hardness of the composites were investigated. The results obtained are summarized as follows: (1) The composites were producible within the range of 10 to 45% volume fraction of whisker. (2) The bending and tensile strengths of composites increased with an increase in the volume fraction of whisker, and the maximum bending strength was 860 MPa at the volume fraction of 45% SiC whisker and the maximum tensile strength was 435 MPa at the volume fraction of 43% SiC whisker. (3) The elastic modulus of the composites increased with increase in the volume fraction of whisker, and agreed approximately with the prediction based on the rule of mixture. (4) The indentation hardness of the composites increased with an increase in the volume fraction of whisker. (5) The Si_3N_4 and SiC whisker reinforced aluminum matrix composites fractured, accompanying the failure of whisker. On the other hand, the K_2O・6TiO_2 whisker reinforced aluminum matrix composites fractured by separating at the whisker-matrix interface.
社団法人日本材料学会の論文
1985-01-15