Plastic deformation of silicon nitride/boron nitride fibrous monoliths.

Journal Article · Wed Jan 31 23:00:00 EST 2001 · J. Eur. Ceram. Soc.

DOI:https://doi.org/10.1016/S0955-2219(00)00175-8· OSTI ID:942772

de Arellano-Lopez, A R; Lopez-Pombero, S; Dominguez-Rodriguez, A; Routbort, J L; Singh, D; Goretta, K C

High-temperature compressive creep of unidirectional Si{sub 3}N{sub 4}/BN fibrous monoliths has been investigated at 1300-1500 C in an inert atmosphere. The results were then compared to those for deformation of the Si{sub 3}N{sub 4} and BN base materials. Plasticity of the fibrous monoliths was limited to very low stresses when the Si{sub 3}N{sub 4} cells were oriented perpendicular to the stress axis because the BN cell boundaries failed, followed by failure of the Si{sub 3}N{sub 4} cells. In the fibrous monolith in which cells were oriented parallel to the stress axis, steady-state deformation controlled by deformation of the Si{sub 3}N{sub 4} cells was achieved.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: DOD; FOR
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 942772
• Report Number(s): ANL/ET/JA-34507
• Journal Information: J. Eur. Ceram. Soc., Journal Name: J. Eur. Ceram. Soc. Journal Issue: 2 ; Feb. 2001 Vol. 21; ISSN 0955-2219; ISSN JECSER
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

36 MATERIALS SCIENCE
BORON NITRIDES
CREEP
DEFORMATION
FIBERS
MECHANICAL PROPERTIES
PLASTICITY
SILICON NITRIDES
STRESSES
TEMPERATURE RANGE 1000-4000 K