Paper Title:
Anelastic Spectroscopy in Al2O3
  Abstract

Engineering ceramics have found use in many applications, such as engine parts, ball bearings, artificial bone and hip replacements and gyroscopes, because of their good chemical inertness, hardness, high temperature stability and excellent wear resistance. Oxide ceramic may meet these demands. Alumina (Al2O3) ceramics offer a high potential for many engineering applications, such as wear- and/or corrosion-resistant components, and as material for substrates or housings in microelectronic devices. Alumina is used among other things for seal ring, draw-cones, guides, water mixing tapes, bearing parts, medical prostheses and cutting tools. Measurements of the elastic energy loss and modulus (anelastic spectroscopy) as a function of temperature can distinguish among the different atomic jumps, which occurs in the various phases or at different local ordering. In this paper, it is reported anelastic relaxation measurements in Al2O3 samples using commercial starch. These measurements were carried out in a torsion pendulum operating in frequencies around 40 Hz. The results shown strongly influence of the type of forming in the elastic modulus obtained by anelastic relaxation measurements.

  Info
Periodical
Materials Science Forum (Volumes 498-499)
Edited by
Lucio Salgado and Francisco Ambrozio Filho
Pages
564-568
DOI
10.4028/www.scientific.net/MSF.498-499.564
Citation
C. R. Grandini, R.L.N. Oliveira, R. P. Mota, F.P. Santos, É. de Campos, "Anelastic Spectroscopy in Al2O3", Materials Science Forum, Vols. 498-499, pp. 564-568, 2005
Online since
November 2005
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Abílio P. Silva, Ana M. Segadães, Tessaleno C. Devezas
Abstract:A self-flow refractory castable (SFRC) without cement requires a matrix of fine particles and a broad size distribution of coarse particles...
2260
Authors: Meng Fu Wang, Xing Yu Song
Abstract:The relationships between the mechanical properties of modified concrete and the composition of latex blend were studied. Influence of steel...
1869
Authors: Hong Wei Wang
Chapter 1: Sustainable Construction Materials Technology
Abstract:A designed experimental study has been conducted to investigate the effect of polypropylene fiber on the compressive strength and flexural...
30
Authors: S.P. Nikanorov, B.K. Kardashev, B.N. Korchunov, V.N. Osipov
Chapter 4: Dislocation Dynamics
Abstract:Acoustic measurements of Young’s modulus and internal friction at frequencies of longitudinal vibrations of about 100 kHz were made in the...
161