Paper Title:
A Critical Assessment of Porosity Coarsening during Solid State Sintering
  Abstract

Understanding porosity coarsening is essential for controlling the properties of sintered materials and for producing high density or near net shape parts. As porosity is interconnected up to relative densities in excess of 80% or even 95%, measuring, monitoring and modelling of the growth of individual pores is relevant only at very high relative densities. This paper tries to convey two essentials of porosity coarsening: (i) characterization of the geometry of the pore space in the lower range of densities is possible by using stereological parameters, and (ii) coarsening of porosity takes place during all sintering stages by various mechanisms. Porosity coarsening has been reported in metals, ceramics and glasses. Recent and classical approaches, experimental results with two dimensional model arrangements as well as computer simulations of formation and opening of particle contacts are discussed. The effect of porosity dimensions on the properties of sintered materials and measures for preventing and provoking porosity coarsening are briefly addressed.

  Info
Periodical
Edited by
P. VINCENZINI
Pages
539-548
DOI
10.4028/www.scientific.net/AST.45.539
Citation
H. E. Exner, G. Petzow, "A Critical Assessment of Porosity Coarsening during Solid State Sintering", Advances in Science and Technology, Vol. 45, pp. 539-548, 2006
Online since
October 2006
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Fumihiro Wakai
Abstract:The interparticle mass transport causes the larger particles to grow at the expense of the smaller particles in the process of sintering....
2359
Authors: Suk Bin Lee, Anthony D. Rollett
Abstract:Coarsening of particles during liquid phase sintering is known to be an example of Ostwald ripening. This coarsening process, in a fully...
1115
Authors: Roger D. Doherty
C.S. Smith Lecture
Abstract:Normal and abnormal grain coarsening, NGC and AGC, are briefly reviewed and discussed in the light of grain curvature and kinetic models -...
1
Authors: Shui Qing Xiao, Shang Hua Wu
Chapter 2: Nano and Inorganic Functional Materials
Abstract:Mechanical properties of ceramic materials are closely related to the grain size, and control the ceramic material grain size is the key to...
374