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Solidification Microstructures of Laser‐Melted Alumina Powder Compacts
Author(s) -
Matthiesen David H.,
Petuskey William T.
Publication year - 1985
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.1151-2916.1985.tb15324.x
Subject(s) - microstructure , materials science , laser , composite material , radiation , metallurgy , mineralogy , optics , geology , physics
Dense, thin sheets of α‐alumina formed after solidification of powder compact surfaces which were melted using CO 2 laser radiation. The microstructures and surface topographies varied with the depth of melt. Most significant was a zone of columnar grains oriented in the [661] direction which yielded smooth surfaces for intermediate depths.