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Machinable Ceramics Containing Rare‐Earth Phosphates
Author(s) -
Davis Janet B.,
Marshall David B.,
Housley Robert M.,
Morgan Peter E. D.
Publication year - 1998
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.1151-2916.1998.tb02602.x
Subject(s) - materials science , machining , ceramic , mullite , grinding , microstructure , tungsten carbide , cubic zirconia , composite material , carbide , phase (matter) , metallurgy , chemistry , organic chemistry
Two‐phase composites consisting of LaPO 4 or CePO 4 and alumina, mullite, or zirconia were found to be machinable; i.e., they can be cut and drilled using conventional tungsten carbide metal‐working tools. Single‐phase LaPO 4 was also machinable. Measurements of drilling rates, grinding rates, and normal forces are used to compare the ease of machining in these materials and in a conventional machinable glass‐ceramic material, and to provide preliminary information on the relation between microstructure and machining properties. In Hertzian contact experiments these materials showed extensive nonlinear behavior associated with a damage zone beneath the contact site, similar to other machinable ceramics. Mechanisms of material removal are discussed.