Prediction of Crack Path Based on Geometrical Parameters for Si3N4 Ceramics

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Prediction of Crack Path Based on Geometrical Parameters for Si3N4 Ceramics

Popis výsledku v původním jazyce

The high fracture toughness of silicon nitride ceramic is given by reinforcement of microstructure by elongated beta silicon nitride grains. The effect of reinforcement is dependent on many factors as grain aspect ratio, glassy phase, presence of so called ?snowflakes etc. Present computation capacities enable modelling of fracture processes undergoing in such materials on the microstructure level. However, the complexity of the microstructure causes difficulties with the crack propagation modelling. Especially the interfacial grain decohesion energy is not simple to determine. The indentation technique for fracture microstructural parameters determination was used because of its simplicity and straight forward application for any other material. An Extensive fractographic analysis was employed to determine fracture patterns. Mainly the observation using scanning electron microscopy showed behaviour of individual grains where inter-granular and trans-granular fracture was clearly disti

Název v anglickém jazyce

Prediction of Crack Path Based on Geometrical Parameters for Si3N4 Ceramics

Popis výsledku anglicky

The high fracture toughness of silicon nitride ceramic is given by reinforcement of microstructure by elongated beta silicon nitride grains. The effect of reinforcement is dependent on many factors as grain aspect ratio, glassy phase, presence of so called ?snowflakes etc. Present computation capacities enable modelling of fracture processes undergoing in such materials on the microstructure level. However, the complexity of the microstructure causes difficulties with the crack propagation modelling. Especially the interfacial grain decohesion energy is not simple to determine. The indentation technique for fracture microstructural parameters determination was used because of its simplicity and straight forward application for any other material. An Extensive fractographic analysis was employed to determine fracture patterns. Mainly the observation using scanning electron microscopy showed behaviour of individual grains where inter-granular and trans-granular fracture was clearly disti

Druh

O - Ostatní výsledky

CEP obor

JL - Únava materiálu a lomová mechanika

OECD FORD obor

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Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů