Gelcasting superalloy powders

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Description

Gelcasting is a process for forming inorganic powders into complex shapes. It was originally developed for ceramic powders. A slurry of powder and a monomer solution is poured in to mold and polymerized in-situ to form gelled parts. Typically, only 2-4 wt % Polymer is used. The process has both aqueous and nonaqueous versions. Gelcasting is a generic process and has been used to produce ceramic parts from over a dozen different ceramic compositions ranging from alumina-based refractories to high-performance silicon nitride. Recently, gelcasting has been applied to forming superalloy powders into complex shapes. This application has posed several challenges ... continued below

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8 p.

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Janney, M.A. December 31, 1995.

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Description

Gelcasting is a process for forming inorganic powders into complex shapes. It was originally developed for ceramic powders. A slurry of powder and a monomer solution is poured in to mold and polymerized in-situ to form gelled parts. Typically, only 2-4 wt % Polymer is used. The process has both aqueous and nonaqueous versions. Gelcasting is a generic process and has been used to produce ceramic parts from over a dozen different ceramic compositions ranging from alumina-based refractories to high-performance silicon nitride. Recently, gelcasting has been applied to forming superalloy powders into complex shapes. This application has posed several challenges not previously encountered in ceramics. In particular, problems were caused by the larger particle size and the higher density of the particles. Additional problems were encountered with binder removal. How these problems were overcome will be described.

Physical Description

8 p.

Notes

OSTI as DE96005625

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  • 4. international conference on powder metallurgy, Anaheim, CA (United States), 8-10 May 1995

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  • Other: DE96005625
  • Report No.: CONF-9505313--2
  • Grant Number: AC05-84OR21400
  • Office of Scientific & Technical Information Report Number: 198867
  • Archival Resource Key: ark:/67531/metadc667297

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Office of Scientific & Technical Information Technical Reports

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Creation Date

  • December 31, 1995

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • Jan. 22, 2016, 11:09 a.m.

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Janney, M.A. Gelcasting superalloy powders, article, December 31, 1995; Tennessee. (digital.library.unt.edu/ark:/67531/metadc667297/: accessed November 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.