Creep and stress rupture behavior of an advanced silicon nitride; Part 3: Stress rupture and the Monkman-Grant relationship

Journal Article · Sun May 01 04:00:00 EDT 1994 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1994.tb05397.x· OSTI ID:7045326

Menon, M N; Fang, H T; Wu, D C ^[1]; Jenkins, M G ^[2]; Ferber, M K ^[3]

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1. AlliedSignal Aerospace Co., Phoenix, AZ (United States). AlliedSignal Engines
2. Univ. of Washington, Seattle, WA (United States). Dept. of Mechanical Engineering
3. Oak Ridge National Lab., Oak Ridge, TN (United States). High Temperature Materials Lab.

The applicability of the Monkman-Grant relationship to predict the stress rupture life of NT154 silicon nitride is examined. The data show that the Monkman-Grant lines relating rupture life to minimum creep rate are stratified with respect to temperature. A modification to the current expression for the Monkman-Grant relation is proposed to accommodate this temperature dependence. A phenomenological approach based on crack growth as the failure mechanisms is presented to explain this temperature dependence. The results can be interpreted as suggesting that the stress dependence of the failure process is greater than that for creep.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 7045326
• Journal Information: Journal of the American Ceramic Society; (United States), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 77:5; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
CALCULATION METHODS
CRACK PROPAGATION
CREEP
FAILURES
LIFETIME
MECHANICAL PROPERTIES
NITRIDES
NITROGEN COMPOUNDS
PNICTIDES
RUPTURES
SERVICE LIFE
SILICON COMPOUNDS
SILICON NITRIDES