Chapter 19.4

Chapter 19.4 - Effect of alloying on heat conduction in...

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16 MSE 2090: Introduction to Materials Science Chapter 19, Thermal Properties Effect of alloying on heat conduction in metals The same factors that affect the electrical conductivity (discussed in Chapter 18) also affect thermal conductivity in metals. E.g., adding impurities introduces scattering centers for conduction band electrons and reduce k . Cu-Zn alloy
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17 MSE 2090: Introduction to Materials Science Chapter 19, Thermal Properties Quest for good thermoelectric (TE) materials Thermoelectric conversion: conversion of thermal to electrical energy An applied temperature difference Δ T causes charge carriers in the material (electrons or holes) to diffuse from the hot side to the cold side, resulting in current flow through the circuit and producing an electrostatic potential Δ V . Figure of merit of TE material: ZT =( α 2 σ / k ) T where σ , κ and α are the electrical conductivity, thermal conductivity, and Seebeck coefficient defined as α = V / T . Li et al.,
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This note was uploaded on 02/14/2012 for the course MSE 2090 taught by Professor Leoindzhiglei during the Fall '10 term at UVA.

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Chapter 19.4 - Effect of alloying on heat conduction in...

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