Microstructure development during final/intermediate stage sintering. I. Pore/grain boundary separation

Journal Article · Thu Dec 31 23:00:00 EST 1981 · Acta Metall.; (United States)

DOI:https://doi.org/10.1016/0001-6160(82)90145-6· OSTI ID:5600208

Hsueh, C H ^[1]; Evans, A G; Coble, R L

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1. Lawrence Berkeley Lab., CA

The motion of pores attached to two grain interfaces has been analyzed. It is shown that pores exhibit a maximum steady state velocity that varies with the dihedral angle and that the onset of nonsteady state pore motion results in grain boundary convergence and the separation of the pore from the grain boundary. The peak steady pore velocity has been compared with grain boundary velocities for several grain configurations, in order to identify a critical condition for the onset of separation. This comparison indicates that the pore size must be maintained below a critical value to ensure attachment.

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5600208
• Journal Information: Acta Metall.; (United States), Journal Name: Acta Metall.; (United States) Vol. 30; ISSN AMETA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360000* -- Materials
CRYSTAL STRUCTURE
FABRICATION
GRAIN BOUNDARIES
MICROSTRUCTURE
POROSITY
SINTERING
VELOCITY