Evaluation of Microfracture Strength of Surface Layers of Ceramics Using a Spherical Indenter

Evaluation of Microfracture Strength of Surface Layers of Ceramics Using a Spherical Indenter

An investigation was carried out in order to develop a sphere indentation method for evaluating microfracture strength of surface layers of structural ceramics. Indentation tests on Si3N4 plates using a Si3N4 spherical indenter as well as conventional bending tests were carried out. The relationship...

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Veröffentlicht in:Nihon Kikai Gakkai ronbunshū. A 1994/07/25, Vol.60(575), pp.1538-1544
Hauptverfasser: Ichikawa, Masahiro, Ohgushi, Kohji, Takamatsu, Tohru
Format: Artikel
Sprache:eng ; jpn
Schlagworte:
Bending (deformation)
Ceramics
Crack propagation
Cracks
Effective Area
Fracture
Impact testing
Indentation
Material Testing
Materials testing
Probabilistic Method
Probability
Ring Crack
Silicon nitride
Spherical Indenter
Statistical tests
Strength of materials
Surface Layer
Surfaces
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Zusammenfassung:An investigation was carried out in order to develop a sphere indentation method for evaluating microfracture strength of surface layers of structural ceramics. Indentation tests on Si3N4 plates using a Si3N4 spherical indenter as well as conventional bending tests were carried out. The relationship between the ring crack initiation strength evaluated from indentation tests and bending fracture strength was examined using the concept of effective area based on the Weibull distribution. The indenter size dependence of the ring crack initiation strength was also examined using the same concept.
ISSN:0387-5008
1884-8338
DOI:10.1299/kikaia.60.1538