pISSN : 1598-706X / eISSN : 2288-8381
한국주조공학회지 (36권5호 147-152)
Effect of Boron on Electrical and Thermal Conductivities of Aluminum
알루미늄의 전기 및 열전도도에 미치는 Boron의 영향
Min-Kyung Park*,**, Jae-Ik Cho†*, Seong-Hee Lee†** and Cheol-Woo Kim*
*Korea Institute of Industrial Technology,**Dept. Materials Science and Engineering, Mokpo National University
Aluminum has been used as an alternative material for copper, due to its good electrical and thermal conductivities. However,small quantities of transition elements such as Ti and V affect the conductivities of aluminum. Therefore, in this study, the influence of B addition to reduce the effects of Ti and V on the conductivities of aluminum was investigated. Both the electrical and thermal conductivities of aluminum were improved with addition of B up to 0.05 wt%, while the conductivities were gradually reduced with an excess amount of B. SEM-EDS and XRD results e exhibited that B reacted with Ti and V element to form diborides, such as TiB2 and VB2 phase, and those diborides tended to settle down to the bottom of the crucible because their densities were higher than that of aluminum melt. As a result, B reduced the deleterious effects of Ti and V, and the electrical and thermal conductivities of aluminum were improved.
Aluminum, Boron, Electrical conductivity, Thermal conductivity
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