Evaluation of Creep Property of AS800 Silicon Nitride from As-Processed Surface Regions

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Tensile creep studies were carried out to evaluate the creep performance of AS800 silicon nitride samples extracted from the surface and bulk regions of as-processed billets at 1350 C in air. The objective of this study was to understand the creep properties of the silicon nitride in the as-processed surface region and determine if they are comparable to those obtained from the bulk region. The results indicated that samples from the as-processed surface region exhibited higher creep rates and shorter lifetimes as compared with those obtained from the bulk region. The poor creep performance of material from the as-processed surface ... continued below

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8 pages

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Lin, H.T. March 9, 2001.

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Description

Tensile creep studies were carried out to evaluate the creep performance of AS800 silicon nitride samples extracted from the surface and bulk regions of as-processed billets at 1350 C in air. The objective of this study was to understand the creep properties of the silicon nitride in the as-processed surface region and determine if they are comparable to those obtained from the bulk region. The results indicated that samples from the as-processed surface region exhibited higher creep rates and shorter lifetimes as compared with those obtained from the bulk region. The poor creep performance of material from the as-processed surface region was due to the higher content of glassy phase enriched with oxygen and sintering additive elements.

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8 pages

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  • 25th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures, Conference location not supplied, Dates not supplied

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  • Report No.: P01-110240
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 777690
  • Archival Resource Key: ark:/67531/metadc715932

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • March 9, 2001

Added to The UNT Digital Library

  • Sept. 29, 2015, 5:31 a.m.

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  • March 24, 2016, 9:12 p.m.

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Lin, H.T. Evaluation of Creep Property of AS800 Silicon Nitride from As-Processed Surface Regions, article, March 9, 2001; Tennessee. (digital.library.unt.edu/ark:/67531/metadc715932/: accessed January 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.