Premium
Ceramic Composites of Monazite and Alumina
Author(s) -
Morgan Peter E. D.,
Marshall David B.
Publication year - 1995
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.1151-2916.1995.tb08851.x
Subject(s) - monazite , materials science , composite material , interphase , ceramic , fracture toughness , phase (matter) , toughness , chemistry , paleontology , zircon , organic chemistry , biology , genetics
A new family of high‐temperature, oxidation‐resistant, ceramic composites, with (La)‐monazite (LaPO 4 ) serving as a weakly bonded interphase, is proposed. Monazite is stable and phase‐compatible with alumina at temperatures at least as high as 1750°C in air. Especially important for use in high‐toughness composites, the monazite‐alumina interface is shown to be sufficiently weak that interfacial debonding prevents cracks from growing from monazite into alumina. Observations of fracture responses of fibrous and laminar reinforcements are presented.