SiC particle reinforced oxynitride glass: Stress relaxation, creep, and strain-rate imposed experiments

Journal Article · Mon Nov 02 04:00:00 EST 1998 · Acta Materialia

DOI:https://doi.org/10.1016/S1359-6454(98)00271-7· OSTI ID:302351

Rouxel, T; Baron, B; Verdier, P ^[1]; Sakuma, T ^[2]

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1. Univ. de Rennes 1 (France). Lab. Verres et Ceramiques
2. Univ. of Tokyo, Hongo, Tokyo (Japan). Dept. of Materials Science

The stress relaxation and creep behaviors of particulate composites consisting of SiC particles embedded in an oxynitride glass matrix were characterized for particle size and volume fraction from 3 to 150 {micro}m and 0. to 40%, respectively. The presence of rigid particles results in significant decreases in the relaxation kinetics and creep rates. Furthermore, the apparent viscosity of the composites exhibits a strain dependence (strain hardening), and a critical strain, depending on both particle size and volume fraction, at which flow is apparently blocked has been successfully introduced to interpret the data. A preliminary study of the behavior at constant strain rates in the 10{sup {minus}5}--10{sup {minus}1}/s range, shows a tension-compression flow asymmetry as well as a shear thinning effect for strain rates above 10{sup {minus}3}/s.

• OSTI ID: 302351
• Journal Information: Acta Materialia, Journal Name: Acta Materialia Journal Issue: 17 Vol. 46; ISSN 1359-6454; ISSN ACMAFD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPOSITE MATERIALS
CREEP
FLOW STRESS
GLASS
SILICON CARBIDES
STRAIN RATE
STRESS RELAXATION