ISSN:
1662-0356
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Natural Sciences in General
,
Technology
Notes:
Understanding porosity coarsening is essential for controlling the properties of sinteredmaterials and for producing high density or near net shape parts. As porosity is interconnected upto relative densities in excess of 80% or even 95%, measuring, monitoring and modelling of thegrowth of individual pores is relevant only at very high relative densities. This paper tries toconvey two essentials of porosity coarsening: (i) characterization of the geometry of the pore spacein the lower range of densities is possible by using stereological parameters, and (ii) coarsening ofporosity takes place during all sintering stages by various mechanisms.Porosity coarsening has been reported in metals, ceramics and glasses. Recent and classicalapproaches, experimental results with two dimensional model arrangements as well as computersimulations of formation and opening of particle contacts are discussed. The effect of porositydimensions on the properties of sintered materials and measures for preventing and provokingporosity coarsening are briefly addressed
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/42/transtech_doi~10.4028%252Fwww.scientific.net%252FAST.45.539.pdf
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