Accession Number : ADA119725

Title :   The Wetting Behavior of Yttria-Alumina-Silica Additives for Pressureless Sintering of Silicon Nitride.

Descriptive Note : Final rept. Jul 79-Jan 81,


Personal Author(s) : Miller,Alan D

PDF Url : ADA119725

Report Date : Apr 1982

Pagination or Media Count : 62

Abstract : The aims of this study were to observe and measure the wetting behavior of liquid yttria-alumina-silica mixtures when in contact with silicon nitride at high temperature and in an environment of one atmosphere of nitrogen. Preliminary indications suggest that over a wide range of yttrium contents, the wettability range is small and that the compositions are reactive to the substrate even though they do not wet readily. A much larger experimental data base is necessary, however, over a wider range of experimental conditions to understand the wetting characteristics and reaction behavior in this complex system. (Author)

Descriptors :   *Metallurgy, *Silicon nitrides, *Sintering, *Mechanical properties, *Wetting, *Yttrium compounds, *Aluminates, *Silicates, Penetration, Interactions, Additives, Measurement, Heat treatment, High temperature, Pressure, Vapor deposition, Optical properties, X ray diffraction, Electron microscopy, Liquid phases, Crystallography, Substrates

Subject Categories : Physical Chemistry
      Metallurgy and Metallography
      Mfg & Industrial Eng & Control of Product Sys

Distribution Statement : APPROVED FOR PUBLIC RELEASE