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Titolo:
Creep and stress-rupture behavior of Y2O3-Nd2O3-doped silicon nitrides with different additive contents
Autore:
Cao, JW; Okada, A; Hirosaki, N;
Indirizzi:
Japan Fine Ceram Ctr, Nagoya, Aichi 4568587, Japan Japan Fine Ceram Ctr Nagoya Aichi Japan 4568587 oya, Aichi 4568587, Japan Natl Res Inst Inorgan Mat, Tsukuba, Ibaraki 3050044, Japan Natl Res Inst Inorgan Mat Tsukuba Ibaraki Japan 3050044 ki 3050044, Japan
Titolo Testata:
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
fascicolo: 2, volume: 22, anno: 2002,
pagine: 237 - 245
SICI:
0955-2219(200202)22:2<237:CASBOY>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
TENSILE CREEP; GRAIN-BOUNDARY; CERAMICS; INTERLOCKING; CARBIDE; DAMAGE; OXIDES; SI3N4;
Keywords:
creep; electron microscopy; sintering aid; Si3N4; stress rupture;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
38
Recensione:
Indirizzi per estratti:
Indirizzo: Okada, A Japan Fine Ceram Ctr, Nagoya, Aichi 4568587, Japan Japan Fine Ceram Ctr Nagoya Aichi Japan 4568587 i 4568587, Japan
Citazione:
J.W. Cao et al., "Creep and stress-rupture behavior of Y2O3-Nd2O3-doped silicon nitrides with different additive contents", J EUR CERAM, 22(2), 2002, pp. 237-245

Abstract

Tensile creep tests were performed on two grades of gas-pressure sintered silicon nitride. Silicon nitride SN4 contained 2.0 mol Nd2O3 and 2.0 mol%. Y2O3 as sintering aids, and the additives for silicon nitride SN1 were 0.5 mol% Nd2O3 and 0.5 mol%. Y2O3. The delayed failure of SN4 was thought to result from creep rupture because considerable creep deformation was found with a high stress exponent of n = 10.7 in the stress range of 137 to 220 MPaat 1300 degreesC. and the stress-rupture parameter was determined to be N = 8.4. The delayed failure of SN I was thought to result from subcritical crack growth since no significant creep deformation was found and a high stress-rupture parameter of N = 20.7 was determined. The creep and stress-rupture mechanisms are discussed based on the creep test results and microstructure observation. (C) 2001 Elsevier Science Ltd. All rights reserved.

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Documento generato il 28/09/20 alle ore 23:57:04