An Experimental Study of The Effects of Ceramic Composition on The Electrical and Thermal Properties of Al/SiC Composites

Öz

Al/SiC metal-matrix composites were investigated through Differential Thermal Analysis device as a function of volume fraction of SiC particles and sample temperature ranging 273 K to 373 K. It was found that electrical resistivity increased with increasing sample temperature and volume fraction of SiC. In contrast to electrical resistivity, electrical conductivity decreased with increasing sample temperature and volume fraction of SiC. Electrical conductivity decreased from 1,8x107 1/ohm.m to 2x106 1/ohm.m as the volume fraction of SiC increased to 60%. On the other hand, thermal conductivity decreased with increasing volume fraction of SiC particles, while being almost insensitive to temperature change between 273 K to 373 K. Thermal conductivity decreased from 120 W/mK to 10 W/mK as the volume fraction of SiC increased to 60%.

Anahtar Kelimeler

• Metal-Matrix composites
• Electrical conductivity
• Thermal conductivity
• Al/SiC

Al/SiC Kompozit Malzemelerde Seramik Bileşenin Hacimsel Oranının Elektriksel ve Isıl Özellikler Üzerindeki Etkilerinin Deneysel İncelemesi

Öz

Bu çalışmada Al/SiC metal matris kompozit malzemelerde, seramik bileşenin hacimsel değişiminin elektiriksel ve ısıl iletkenlik üzerindeki etkileri 273K- 373K sıcaklık aralığında, deneysel olarak ile incelenmiştir. Test sonuçlarında, sıcaklığın ve seramik bileşenin hacimsel oranının artmasıyla elektriksel direncin arttığı ve elektiriksel iletkenliğin azaldığı görülmüştür. Seramik bileşenin yapı içerisindeki hacimsel oranı %60’a artması ile elektriksel iletkenlik 1,8x107 1/ohm.m değerinden 2x106 1/ohm.m değerine düşmüştür. Ayrıca metal matris kompozit malzemelerde seramik bileşenin artması ile termal iletkenliği azalmış olup 273 ila 373K arasındaki sıcaklık değişiminin ısıl iletkenlik üzerinde önemli bir etkisi olmamıştır. Seramik bileşenin hacimsel oranının %60’a çıkması ile ısıl iletkenlik 120 W/mK değerinden 10 W/mK değerine düşmüştür.

Anahtar Kelimeler

• Metal-Matris kompozitler
• Elektriksel iletkenlik
• Isıl iletkenlik
• Al/SiC

Kaynakça

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