Processing and mechanical properties of silicon nitride formed by robocasting aqueous slurries

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Description

Robocasting is a new freeform fabrication technique for dense ceramics. It uses robotics to control deposition of ceramic slurries through an orifice. The optimization of concentrated aqueous Si{sub 3}N{sub 4} slurry properties to achieve high green density robocast bodies and subsequent high sintered densities was investigated. The effects of pH, electrolyte, additives and solids loading on the dispersion and rheological properties of Si{sub 3}N{sub 4} slurries were determined. The mechanical behavior of sintered robocast bars was determined and compared to conventionally produced silicon nitride ceramics.

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9 p.

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HE,GUOPING; HIRSCHFELD,DEIDRE A. & CESARANO III,JOSEPH January 26, 2000.

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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. It has been viewed 31 times . More information about this article can be viewed below.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM, and Livermore, CA (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

Robocasting is a new freeform fabrication technique for dense ceramics. It uses robotics to control deposition of ceramic slurries through an orifice. The optimization of concentrated aqueous Si{sub 3}N{sub 4} slurry properties to achieve high green density robocast bodies and subsequent high sintered densities was investigated. The effects of pH, electrolyte, additives and solids loading on the dispersion and rheological properties of Si{sub 3}N{sub 4} slurries were determined. The mechanical behavior of sintered robocast bars was determined and compared to conventionally produced silicon nitride ceramics.

Physical Description

9 p.

Notes

OSTI as DE00751130

Medium: P; Size: 9 pages

Source

  • 24th Annual Cocoa Beach Conference on Engineering Ceramics and Structures, Cocoa Beach, FL (US), 01/23/2000--01/28/2000

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  • Report No.: SAND2000-0284C
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 751130
  • Archival Resource Key: ark:/67531/metadc707231

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  • January 26, 2000

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • April 11, 2017, 9:03 p.m.

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HE,GUOPING; HIRSCHFELD,DEIDRE A. & CESARANO III,JOSEPH. Processing and mechanical properties of silicon nitride formed by robocasting aqueous slurries, article, January 26, 2000; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc707231/: accessed June 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.