Temperature dependence of the heat capacity and change in the thermodynamic functions of strontium-alloyed AK1M2 alloy

Izatullo N Ganiev,Suhrob E Otajonov,M Mahmudov,Nasim F Ibrohimov

doi:10.3897/j.moem.4.3.38763

Abstract

The temperature dependence of the specific heat capacity and change in the thermodynamic functions of strontium-alloyed ultrahigh-purity aluminum base AK1M2 alloy have been studied in “cooling” mode over the 298.15–900 K range. Mathematical models describing the evolution of these properties of the alloys in the abovementioned temperature range with change in alloying addition concentration have been obtained. The heat capacity, enthalpy and entropy of the alloys increase with temperature, decrease with an increase in the alloying addition concentration to 0.5 wt.% and grow with a further increase in the alloying addition concentration. The Gibbs energy of the alloys has an inverse dependence: it decreases with an increase in temperature and grows with an increase in the alloying addition concentration to 0.5 wt.%.

Highlights

Numerous works have dealt with the physicochemical properties of industrial purity aluminum alloys [1,2,3,4,5,6,7,8,9,10,11,12], but the situation concerning ultrahigh-purity aluminum alloys is different
The development of semiconductor technologies is accompanied by the improvement of another design and Ganiev IN et al.: Temperature dependence of the heat capacity and change in
The aim of this work is to study the effect of temperature and strontium content on the heat capacity and thermodynamic characteristics of ultrahigh-purity aluminum base AK1M2 alloy

Summary

Introduction

Numerous works have dealt with the physicochemical properties of industrial purity aluminum alloys [1,2,3,4,5,6,7,8,9,10,11,12], but the situation concerning ultrahigh-purity aluminum alloys is different. Of greatest practical interest are anodized aluminum base substrates combined with interconnections on polyimide films which allow fabricating multilevel interconnections and provide for efficient heat removal and the required structural strength. In Russian and international practice, the technology of thin metallic films for ICs is currently undergoing a transition from single-component metallic materials to high-purity metal base alloys containing two or more alloying additions. This transition is absolutely reasonable since the use of pure metals as semiconducting materials may lead to a number of technological and operation deviations which can be avoided by microalloying. The aim of this work is to study the effect of temperature and strontium content on the heat capacity and thermodynamic characteristics of ultrahigh-purity aluminum base AK1M2 alloy

Experimental

Results and discussion

Conclusion