Determination of an Effective Viscosity of Powders as a Function of Temperature

  • Wayne S. Young
  • Stephen T. Rasmussen
  • Ivan B. Cutler
Part of the Sagamore Army Materials Research Conference Proceedings book series (SAMC, volume 15)


A method is described for determining the effective viscosity of powder compacts during densification as a function of temperature. The method utilizes constant rate of heating and is easily adapted to determining the sintering temperature of a powder compact as well as measuring the effective viscosity. The method can be used for crystalline as well as glassy (amorphous) systems. Values of the coefficient of viscosity or diffusion can be determined for powders of simple particle geometry and known particle size distribution. For practical applications, an effective viscosity is proposed as a better measure of densification characteristics. Illustration of the method is made by examining shrinkage characteristics of various ceramic powder compacts at constant rates of heating.


Powder Compact Boundary Diffusion Effective Viscosity Volume Diffusion Glass Powder 
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Copyright information

© Syracuse University Press Syracuse, New York 1970

Authors and Affiliations

  • Wayne S. Young
    • 1
  • Stephen T. Rasmussen
    • 1
  • Ivan B. Cutler
    • 1
  1. 1.University of UtahSalt Lake CityUSA

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