Portal de Periódicos da CAPES

Interaction between SiC Fibers and Aluminum Alloys

1983; Japan Institute of Metals and Materials; Volume: 47; Issue: 2 Linguagem: Inglês

10.2320/jinstmet1952.47.2_159

1880-6880

Shin rsquo ichi Towata, Sen rsquo ichi Yamada,

Material Properties and Applications

SiC fibers produced from organosilicon polymer were incorporated into pure aluminum and Al-Si alloy matrixes by the squeeze casting method. The tensile strength of the obtained composites were 500-750 MPa and the tensile modulus agreed with the rule-of-mixture. By use of the composites, the reactions between SiC fibers and aluminum alloys were investigated by differential thermal analysis, scanning electron microscopy and X-ray diffraction analysis.Aluminum carbide and elemental silicon were formed by the exothermic reaction at temperatures above the melting point of aluminum alloy matrix. The activation energy of the exothermic reaction was determined by Kissinger method to be about 200 kJ/mol. It was shown that the Si content (0-15%) in the matrix has little effect on the exothermic peak position in the D.T.A. diagram and the activation energy of the reaction. In the composite with Al-20%Si matrix, aluminum carbide and crystalline silicon carbide were formed by the exothermic reaction.