Premium
Micromechanical Stresses in SiC‐Reinforced Al 2 O 3 Composites
Author(s) -
Li Zhuang,
Bradt Richard C.
Publication year - 1989
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.1151-2916.1989.tb05956.x
Subject(s) - whisker , materials science , composite material , mullite , thermoelastic damping , crystallite , micromechanics , cordierite , composite number , residual stress , volume fraction , inclusion (mineral) , silicon carbide , ceramic , mineralogy , thermal , metallurgy , chemistry , physics , meteorology
Applying an Eshelby approach, the internal micromechanical stresses within an SiC‐inclusion‐reinforced (platelet to whisker geometries) polycrystalline alumina matrix composite were calculated. The results are compared to the experimental residual stress measurements of a SiC‐whisker‐reinforced Al 2 O 3 by Predecki, Abuhasan, and Barrett and found to be in excellent agreement. The calculations are then extended to SiC‐reinforced composites with polycrystalline mullite, silicon nitride, and cordierite matrices. It is concluded that the internal stresses are significantly influenced by the inclusion geometry as well as the thermoelastic differences between the inclusion and the matrix and also the volume fraction.