TY - JOUR

T1 - Eddy current measurement of the electrical conductivity and porosity of metal foams.

AU - Ma, Xiandong

AU - Peyton, A. J.

N1 - "©2006 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE." "This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder."

PY - 2006/3

Y1 - 2006/3

N2 - This paper presents experimental results characterizing the electrical properties of metallic foams, a relatively new class of material, using nondestructive eddy current sensing techniques. The fundamentals of eddy current sensing, which is based on electromagnetic induction, are described, and the effects on coil impedance change of the representative types of coil sensors are analyzed. It has been found that the phase-frequency response of the normalized eddy current signal of the sensor is relatively immune to coil-to-sample spacing and fill-factor variations, from which key results such as the equivalent conductivity and the porosity of the foams are presented. The paper demonstrates the broad applicability of this technique in characterizing and further recognizing the properties of a variety of sample shapes used.

AB - This paper presents experimental results characterizing the electrical properties of metallic foams, a relatively new class of material, using nondestructive eddy current sensing techniques. The fundamentals of eddy current sensing, which is based on electromagnetic induction, are described, and the effects on coil impedance change of the representative types of coil sensors are analyzed. It has been found that the phase-frequency response of the normalized eddy current signal of the sensor is relatively immune to coil-to-sample spacing and fill-factor variations, from which key results such as the equivalent conductivity and the porosity of the foams are presented. The paper demonstrates the broad applicability of this technique in characterizing and further recognizing the properties of a variety of sample shapes used.

KW - Coils

KW - eddy currents

KW - electromagnetic induction

KW - impedance measurement

KW - metallic foams

U2 - 10.1109/TIM.2006.873549

DO - 10.1109/TIM.2006.873549

M3 - Journal article

VL - 55

SP - 570

EP - 576

JO - IEEE Transactions on Instrumentation and Measurement

JF - IEEE Transactions on Instrumentation and Measurement

SN - 0018-9456

IS - 2

ER -