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"Aluminum, as a conductor material, has long been used for high-voltage overhead transmission lines due to its economic value and high electrical conductivity. By adding Al2O3np and alloying elements such as zirconium (Zr), cerium (Ce), and magnesium (Mg), aluminum’s strength and performance could be improved without compromising too much of its electrical conductivity. The focus of this research was to investigate the mechanical, electrical properties, and microstructure of Al-0.12%Zr-0.15%Ce-5%Mg, reinforced with different volume fractions (from 0.5 to 1.5%) of Al2O3 nano particles, using the stir casting method. The tensile strength of the composite was improved by up to 1.2 vf-% in alumina, and decreased with further addition due to clustering and pores, while elongation was reduced with when increasing the reinforcement. It was found that the electrical conductivity of the composite generally decreased with the addition of reinforcement. The microstructure observations showed that the composites yielded finer grains and more pores than the unreinforced alloy, with 1.2vf-% of reinforcement having the finest grain. The electrical conductivity of the composite was 44% IACS, which is still lower than that of the unreinforced alloy."

"Aluminium sebagai bahan konduktor sangatlah luas pengaplikasiannya. Salah satunya adalah untuk kebutuhan kabel transmisi tinggi. Semaikin hari kriteria yang harus dimiliki kabel transmisi ini semakin tinggi, mengingat kebutuhan listrik yang semakin meningkat. Didalam penelitian ini akan dibahas mengenai pembuatan serta pengkarakterisasian material komposit AlZrCe/Al2O3 nano partikel dengan metode pengecoran aduk untuk keperluan kabel transmisi.Di dalam matriks, zirkonium akan menambah ketahanan panas sedangkan cerium akan menjaga konduktivitas listrik agar tidak turun dan diharapakan penambahan partikel Al2O3 akan meningkatkan kekuatan tarik dari komposit ini. Magnesium sebesar 5 wt% ditambahkan sebagai unsur peningkat kemampubasahan antara matriks dan penguat.Didapatkan bahwa penambahan Al2O3 akan meningkatkan kekuatan tarik, menurunkan konduktivitas listrik dan menurunkan koefisien muai panas komposit ini. Titik optimal untuk mendapatkan sifat mekanik listrik dan panas yang paling baik didapatkan pada fraksi volume 1,2% Al2O3. Daerah antarmuka yang didapatkan oleh seluruh sampel pengujian tidaklah baik, sehingga data yang dihasilkan belum bisa optimal dan sesuai dengan harapan.

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Aluminum as conductor material is very broad applicability. One of them is to demand of high-voltage overhead transmission lines. The requirements that must be owned of high-voltage overhead transmission lines are getting higher these days, because the electric needs are increasing. In this research will be investigated about fabrication and characterization AlZrCe/Al2O3(np) using stir casting process for overhead cable transmission.

In the matrix, zirconium will be increase heat resistance, cerium will keep the value of electrical conductivity in order not to decrease and the addition of Al2O3 particles is expected to increase the tensile strength of the composite. Magnesium 5 wt% was adding as wettability agent.

The results showed that the addition of Al2O3 will increase the tensile strength, decrease electrical conductivity and decrease coefficient thermal expansion of this composite. The optimal value for get the best of mechanical, electrical and thermal properties is obtained at 1.2% Al2O3 volume fraction. Interface areas obtained by the entire sample testing is not good, so the resulting data can not be optimal and appropriate expectations."