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Journal of Materials Science

, Volume 10, Issue 7, pp 1169–1174 | Cite as

Pressureless sintering of Si3N4

  • G. R. Terwilliger
  • F. F. Lange
Papers

Abstract

An investigation of the pressureless sintering of Si3N4 powder with the addition of 5 wt % MgO revealed that shrinkage by a liquid phase mechanism and bulk decomposition are two countervailing processes. Within the temperature range studied, i.e. between 1500 and 1750° C, high densities can be achieved when sintering is performed either for long periods at low temperatures or short periods at higher temperatures. A model is presented showing that pore growth due to decomposition causes a decrease in the driving force for sintering and causes shrinkage to cease.

Keywords

Polymer Shrinkage Liquid Phase Pressureless Sinter Pore Growth 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman and Hall Ltd. 1975

Authors and Affiliations

  • G. R. Terwilliger
    • 1
  • F. F. Lange
    • 1
  1. 1.Materials Science Section, Metallurgy and Metals Processing DepartmentWestinghouse Research LaboratoriesPittsburghUSA

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