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Synthesis and high-temperature creep behavior of a SiLuOC-based glass-ceramic

Stabler, Christina and Seemüller, Christoph and Choudhary, Ahmad and Heilmaier, Martin and Lauterbach, Stefan and Kleebe, Hans-Joachim and Ionescu, Emanuel (2016):
Synthesis and high-temperature creep behavior of a SiLuOC-based glass-ceramic.
In: Journal of the Ceramic Society of Japan, The Ceramic Society of Japan, pp. 1006-1012, 124, (10), ISSN 1882-0743,
[Online-Edition: http://dx.doi.org/10.2109/jcersj2.16101],
[Article]

Abstract

In this work, a lutetium-modified silicon oxycarbide (SiOC) glass ceramic was prepared from a single-source precursor via pyrolysis and subsequent hot pressing. It is shown that the main crystalline phase in the hot-pressed SiLuOC is Lu2Si2O7. The high-temperature (HT) creep behavior of SiLuOC was assessed by compression creep experiments performed between 1100 and 1300°C at constant true stresses between 25 and 75 MPa. The calculated viscosity values of SiLuOC were found to be significantly higher as compared to those of SiRE(Al,Mg)ON glasses (RE = rare earth elements). Thus, the presented SiLuOC-based glasses might be used as alternative sintering aids for the liquid-phase sintering of HT creep resistant Si3N4 monolithic samples.

Item Type: Article
Erschienen: 2016
Creators: Stabler, Christina and Seemüller, Christoph and Choudhary, Ahmad and Heilmaier, Martin and Lauterbach, Stefan and Kleebe, Hans-Joachim and Ionescu, Emanuel
Title: Synthesis and high-temperature creep behavior of a SiLuOC-based glass-ceramic
Language: English
Abstract:

In this work, a lutetium-modified silicon oxycarbide (SiOC) glass ceramic was prepared from a single-source precursor via pyrolysis and subsequent hot pressing. It is shown that the main crystalline phase in the hot-pressed SiLuOC is Lu2Si2O7. The high-temperature (HT) creep behavior of SiLuOC was assessed by compression creep experiments performed between 1100 and 1300°C at constant true stresses between 25 and 75 MPa. The calculated viscosity values of SiLuOC were found to be significantly higher as compared to those of SiRE(Al,Mg)ON glasses (RE = rare earth elements). Thus, the presented SiLuOC-based glasses might be used as alternative sintering aids for the liquid-phase sintering of HT creep resistant Si3N4 monolithic samples.

Journal or Publication Title: Journal of the Ceramic Society of Japan
Volume: 124
Number: 10
Publisher: The Ceramic Society of Japan
Uncontrolled Keywords: Silicon oxycarbides, SiLuOC glass ceramics, High-temperature creep behavior, Polymer-derived ceramics
Divisions: 11 Department of Materials and Earth Sciences > Earth Science > Geo-Material-Science
11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
11 Department of Materials and Earth Sciences > Earth Science
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 04 Jan 2017 09:04
Official URL: http://dx.doi.org/10.2109/jcersj2.16101
Identification Number: doi:10.2109/jcersj2.16101
Funders: The German Science Foundation (Deutsche Forschungsgemeinschaft, Bonn, Germany) is gratefully acknowledged for financial support (HE 1872 / 30-1 and IO 64 / 7-1).
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