Published 1992 | Version v1
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Fatigue strength of Al2O3 and Si3N4 ceramics

Creators

Description

Various Al2O3 ceramics and random samples of two Si3N4 ceramics were examined, with all specimens differing in terms of material and manufacturing parameters. Of the Al2O3 ceramics, randomly selected specimens were tested for their banding strength at room temperature, and three specifically selected specimens were tested for their compressive strength at room temperature, at 800 C and at 1200 C. A number of specimen variants were examined by cyclic fatigue tests at room temperature and 800 C, and at 1200 C in one case, the specimens used being slightly notched specimens (αn = 1,02 and 1,08), or more heavily notched speciments (αn = 1.77, 1.90 and 2.24), with bending loads being either cyclic or growing. The Si3N4 specimens were randomly chosen for bending tests and cyclic fatigue tests, at room temperature. (orig./MM)

Availability note (English)

MF available from INIS under the Report Number.

Abstract (German)

Es wurden verschiedene Al2O3-Keramiken sowie stichprobenartig zwei Si3N4-Keramiken untersucht, die sich hinsichtlich ihrer Stoff- und Fertigungsparameter unterschieden. Fuer alle Al2O3-Keramiken wurden unter Raumtemperatur stichprobenartig Biegebruchfestigkeiten und fuer drei ausgesuchte Varianten Druckfestigkeiten unter Raumtemperatur, 800 und 1200 C ermittelt. Mit mehreren Varianten wurden unter Raumtemperatur, 800 C und in einem Fall unter 1200 C Schwingfestigkeitsversuche durchgefuehrt, und zwar mit leicht gekerbten (αkb = 1,02 und 1,08) und staerker gekerbten (αkb = 1,77, 1,90 und 2,24) Proben unter wechselnder und teilweise schwellender Biegebelastung. Mit den Si3N4-Varianten wurden nur stichprobenartig unter Raumtemperatur Biegebruch- und Schwingfestigkeitsversuche angesetzt. (orig./MM)

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Additional details

Additional titles

Original title (German)
Schwingfestigkeit von Al

Publishing Information

Imprint Pagination
137 p.
Report number
LBF-FB--195(1992)

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
25027700
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
ALUMINIUM OXIDES; FATIGUE; FLEXURAL STRENGTH; FRACTOGRAPHY; MICROSTRUCTURE; SILICON NITRIDES; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 1000-4000 K
Descriptors DEC
ALUMINIUM COMPOUNDS; CHALCOGENIDES; CRYSTAL STRUCTURE; MECHANICAL PROPERTIES; NITRIDES; NITROGEN COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PNICTIDES; SILICON COMPOUNDS; TEMPERATURE RANGE

Optional Information

Contract/Grant/Project number
Foerderkennzeichen BMFT 03M2015
Funding organization
Bundesministerium fuer Forschung und Technologie, Bonn (Germany).