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Microstructural characterization of industrial foams by gamma ray transmission and X-ray microtomography; Caracterizacao microestrutural de espumas industriais por transmissao de raios gama e microtomografia de raios X

Abstract

This work presents the total porosity measurements of the aluminum and silicon carbide (SiC) foams samples. For porosity determination the gamma ray transmission and X-ray microtomography with conic beam techniques were used. These methods have more advantage than conventional ones, because they are non destructive and provide more details of the analyzed material porous structure. The aluminum foam samples with 10, 20, 30, 40 and 45 ppi (pores per inch) and SiC ceramic foam samples with 20, 30, 45, 60, 75, 80 and 90 ppi were analysed by gamma transmission. The SiC 60, 75 and 90 ppi samples were also analyzed by X-ray microtomography. For the gamma ray transmission measurements it was used an {sup 241} Am source (59.53 keV), a NaI(Tl) scintillation detector, collimators, a XYZ micrometric table and standard gamma spectrometry electronics connected to a multichannel analyzer, at the LFNA/UEL. For the X-ray microtomographic measurements, the Fein Focus X-ray system of the Nuclear Instrumentation Laboratory of the COPPE, located at the Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, was used. This equipment provide us images with micrometric resolution (53.48 {mu}m) using a conic X-ray beam and bidimensional detection. The microtomographic images were pre-processed and analyzed  More>>
Publication Date:
Jul 01, 2004
Product Type:
Thesis/Dissertation
Report Number:
INIS-BR-4007
Resource Relation:
Other Information: TH: Dissertacao (M.Sc.); 42 refs., 114 figs., 10 tabs
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ALUMINIUM; AMERICIUM 241; EXPERIMENTAL DATA; FOAMS; GAMMA RADIATION; I CODES; NAI DETECTORS; NONDESTRUCTIVE ANALYSIS; PHOTON TRANSMISSION SCANNING; PORE STRUCTURE; POROSITY; SILICON CARBIDES; SPATIAL RESOLUTION; THREE-DIMENSIONAL CALCULATIONS; TOMOGRAPHY
OSTI ID:
20761962
Research Organizations:
Universidade Estadual de Londrina, PR (Brazil). Dept. de Fisica
Country of Origin:
Brazil
Language:
Portuguese
Other Identifying Numbers:
TRN: BR0645284069014
Availability:
Available from INIS in electronic form
Submitting Site:
BRN
Size:
188 pages
Announcement Date:
Aug 31, 2006

Citation Formats

Rodrigues, Luiz Eduardo. Microstructural characterization of industrial foams by gamma ray transmission and X-ray microtomography; Caracterizacao microestrutural de espumas industriais por transmissao de raios gama e microtomografia de raios X. Brazil: N. p., 2004. Web.
Rodrigues, Luiz Eduardo. Microstructural characterization of industrial foams by gamma ray transmission and X-ray microtomography; Caracterizacao microestrutural de espumas industriais por transmissao de raios gama e microtomografia de raios X. Brazil.
Rodrigues, Luiz Eduardo. 2004. "Microstructural characterization of industrial foams by gamma ray transmission and X-ray microtomography; Caracterizacao microestrutural de espumas industriais por transmissao de raios gama e microtomografia de raios X." Brazil.
@misc{etde_20761962,
title = {Microstructural characterization of industrial foams by gamma ray transmission and X-ray microtomography; Caracterizacao microestrutural de espumas industriais por transmissao de raios gama e microtomografia de raios X}
author = {Rodrigues, Luiz Eduardo}
abstractNote = {This work presents the total porosity measurements of the aluminum and silicon carbide (SiC) foams samples. For porosity determination the gamma ray transmission and X-ray microtomography with conic beam techniques were used. These methods have more advantage than conventional ones, because they are non destructive and provide more details of the analyzed material porous structure. The aluminum foam samples with 10, 20, 30, 40 and 45 ppi (pores per inch) and SiC ceramic foam samples with 20, 30, 45, 60, 75, 80 and 90 ppi were analysed by gamma transmission. The SiC 60, 75 and 90 ppi samples were also analyzed by X-ray microtomography. For the gamma ray transmission measurements it was used an {sup 241} Am source (59.53 keV), a NaI(Tl) scintillation detector, collimators, a XYZ micrometric table and standard gamma spectrometry electronics connected to a multichannel analyzer, at the LFNA/UEL. For the X-ray microtomographic measurements, the Fein Focus X-ray system of the Nuclear Instrumentation Laboratory of the COPPE, located at the Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, was used. This equipment provide us images with micrometric resolution (53.48 {mu}m) using a conic X-ray beam and bidimensional detection. The microtomographic images were pre-processed and analyzed by the Imago software, developed at Porous Media and Materials Thermophysical Properties Laboratory (LMPT) of the Mechanical Engineering Department, located at Universidade Federal de Santa Catarina, Florianopolis, SC. Employing the The Imago software it was calculated the total porosity, pore size distribution and autocorrelation function C(u) of the binarized microtomographic images of the each sample. The microtomographic 3-D image of each sample was compared with 3-D image reconstructed by the Gaussian truncated method. This method generates a periodic 3-D porous structure by using of the autocorrelation function of one 2-D cross sectional image of the sample. (author)}
place = {Brazil}
year = {2004}
month = {Jul}
}