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The present work is directed towards development of Cu-Ni-Si based alloy for high strength and high conductivity applications. The work consists of the alloy development and their secondary processing (casting, homogenisation, forging, rolling and ageing treatment) to achieve the defined goals of strength and conductivity. The results show that the alloy composition, percentage rolling and ageing temperature do affect the properties tremendously. The highest ultimate tensile strength achieved in the present work is 830 MPa while the electrical conductivity is 31 %IACS. [ABSTRACT FROM AUTHOR]

We report here electrical and magnetic properties of Al62Cu25.5Fe12.5 icosahedral quasicrystal. We have measured the electrical resistivity from 2K to 300K and observed negative temperature coefficient of resistivity above 15K. Below 15K we see a decrease in resistivity showing maxima around 15K. Upon application of a high magnetic field of 5 Tesla the maxima disappears and below 15 K the resistivity rises sharply. Magnetoresistance was measured at various temperatures as a function of applied field and we observe positive magnetoresistance for all temperatures. We have attributed these effects arising due to spin-orbit scattering. [ABSTRACT FROM AUTHOR]