Investigation of the Sintering Process Using Non-Contact Electromagnetic Acoustic Transducers

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Description

In-situ characterizations of green state part density and sintering state have long been desired in the powder metal community. Recent advances in non-contact electromagnetic acoustic transducer (EMAT) technology have enabled in-situ monitoring of acoustic amplitude and velocity as sintering proceeds. Samples were made from elemental powders of Al (99.99%), Al (99.7%), Ag, (99.99%), Cu (99.99%) and Fe (99.9%). The powders were pressed in a uniaxial die and examined with acoustic waves for changes in velocity and amplitude during sintering for the samples containing Al, Ag, and Cu. The changes in acoustic properties were correlated with sample microstructures and mechanical properties. ... continued below

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5549 pages

Creation Information

Foley, James C.; Rehbein, David K. & Barnard, Daniel J. May 30, 2001.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this article can be viewed below.

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  • Ames Laboratory
    Publisher Info: Ames Lab., IA (United States)
    Place of Publication: Iowa

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Description

In-situ characterizations of green state part density and sintering state have long been desired in the powder metal community. Recent advances in non-contact electromagnetic acoustic transducer (EMAT) technology have enabled in-situ monitoring of acoustic amplitude and velocity as sintering proceeds. Samples were made from elemental powders of Al (99.99%), Al (99.7%), Ag, (99.99%), Cu (99.99%) and Fe (99.9%). The powders were pressed in a uniaxial die and examined with acoustic waves for changes in velocity and amplitude during sintering for the samples containing Al, Ag, and Cu. The changes in acoustic properties were correlated with sample microstructures and mechanical properties. Evolution of a series of reverberating echoes during sintering is shown to provide information on the state of sintering, and changes in sintering kinetics as well as having the potential for detection of interior flaws.

Physical Description

5549 pages

Notes

OSTI as DE00797353

Source

  • Advances in Powder Metallurgy and Particulate Materials, New Orleans, LA (US), 05/13/2001--05/17/2001

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  • Report No.: IS-M 902
  • Grant Number: W-7405-Eng-82
  • Office of Scientific & Technical Information Report Number: 797353
  • Archival Resource Key: ark:/67531/metadc740296

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  • May 30, 2001

Added to The UNT Digital Library

  • Oct. 19, 2015, 7:39 p.m.

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  • Nov. 11, 2015, 6:44 p.m.

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Foley, James C.; Rehbein, David K. & Barnard, Daniel J. Investigation of the Sintering Process Using Non-Contact Electromagnetic Acoustic Transducers, article, May 30, 2001; Iowa. (digital.library.unt.edu/ark:/67531/metadc740296/: accessed September 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.