Neutron diffraction studies of residual stress in alumina/silicon carbide nanocomposites

Conference · Mon Dec 30 23:00:00 EST 1996

OSTI ID:567524

Lamstaes, C; Sternitzke, M; Carroll, L; Derby, B ^[1]; Ibberson, R ^[2]

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1. Univ. of Oxford (United Kingdom)
2. Rutherford Appleton Lab., Oxford (United Kingdom)

The authors have studied the residual stress developed in a number of Al{sub 2}O{sub 3}/SiC nanocomposites fabricated with a range of different SiC mean particle sizes from 12 to 115nm. These materials were found to have mean matrix stresses in the range 150-200 MPa tension and reinforcement stresses of 1.6-1.75 GPa in compression. There was no significant dependence of the measured residual stress level on particle size in the range 55-115nm. However, a much larger residual stress was found in the smallest SiC reinforcements. This value may be an artefact of the polymer precursor processing route necessary to fabricate nanocomposites with such a small SiC particle size.

• OSTI ID: 567524
• Report Number(s): CONF-960106--; CNN: Grant GRJ77542; Contract ERB-BRE2-CT94-3093
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
COMPOSITE MATERIALS
PARTICLE SIZE
RESIDUAL STRESSES
SILICON CARBIDES