Role of GB chemistry of silicon nitride based ceramics with respect to the mechanical properties - experimental and theoretical approach

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F15%3A00450461" target="_blank" >RIV/68081723:_____/15:00450461 - isvavai.cz</a>

Result on the web

—

DOI - Digital Object Identifier

—

Result language

angličtina

Original language name

Role of GB chemistry of silicon nitride based ceramics with respect to the mechanical properties - experimental and theoretical approach

Original language description

Six different sintering aids (Lu 2 O 3 , Yb 2 O 3 , Y 2 O 3 , Sm 2 O 3 , Nd 2 O 3 and La 2 O 3 ) were used for the processing of dense Si 3 N 4 ceramics. Room temperature fracture toughness, hardness and strength showed increasing tendency when the usedrare - earth element in the oxide additive changes from a large to a small rare - earth cation (i.e. from La 3+ to Lu 3+ ). Highest hardness, reasonably high fracture toughness and strength have the ceramic material with Lu 2 O 3 sintering additive. Thefirst principle calcul ations were used for the explanation of the fracture behaviour of the composites depending on the rare earth additive. The energy of fracture was calculated with respect to the chemical composition of GB. The experimental and theoretical results will be di scussed.

Czech name

—

Czech description

—

Type

O - Miscellaneous

CEP classification

JL - Fatigue and fracture mechanics

OECD FORD branch

—

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2015

Confidentiality

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