Premium
Unstable Neck Formation during Initial‐Stage Sintering
Author(s) -
Rankin Janet,
Boatner Lynn A.
Publication year - 1994
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1994.tb07088.x
Subject(s) - sintering , materials science , particle (ecology) , composite material , morphology (biology) , cube (algebra) , mineralogy , crystallography , geometry , geology , chemistry , paleontology , oceanography , mathematics
By observing pairs of single‐crystal cubic‐faceted small particles of MgO in contact along faces, edges, and corners, it was possible to determine the effects of contact geometry on the stability of neck regions formed during the initial stages of sintering. Changes in the neck morphology were monitored during the sintering process by continuous TEM/ video observations of particles heated in situ between 1100° and 1260°C. Particles in face‐to‐face contact were found to coalesce in the classic manner to form a single particle, Particles in contact along either cube corners or edges, however, developed unstable necks that initially grew, then shrunk, and eventually broke so that such particle pairs effectively “de‐sintered.”