Paper Title:
Oxidation Mechanism of ZrB2-SiC Tested in a Solar Furnace above 2200°C
  Abstract

The solar furnace is a heating system based on concentrated sunrays on the material surface. It is an original method for testing ultra-high-temperature ceramics (UHTC) at very high temperature (above 2200°C) in air with an exposure time of several minutes. In this study, the solar flux is 15.5 MW.m-2 with a homogeneous exposed surface of 10 mm2. A large temperature-time composition parameters space is covered producing a large set of oxidized samples. Massive cylindrical specimens of UHTC materials are prepared by spark plasma sintering at 1900°C under a pressure of 100 MPa for 5 minutes. Then, samples are tested in air from 1750°C up to 2400°C with dwell times varied from 1 to 5 min. During oxidation of ZrB2-SiC (20%vol) material, the formed and known complex oxide scale identified from literature is easily reproduced using this method. It consists of a thin outer silica layer and zirconia columnar layer with a region of SiC depleted zone in ZrB2 phase. The impact of the reduction of Si content is quantified and the coating ZrB2-20%vol SiC is tested as protection on C-C composite.

  Info
Periodical
Edited by
Pietro VINCENZINI, Sheldon WIEDERHORN and Paolo COLOMBO
Pages
124-129
DOI
10.4028/www.scientific.net/AST.65.124
Citation
A.-S. Andreani, F. Rebillat, A. Poulon-Quintin, "Oxidation Mechanism of ZrB2-SiC Tested in a Solar Furnace above 2200°C", Advances in Science and Technology, Vol. 65, pp. 124-129, 2010
Online since
October 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Dong Bok Lee, Seung Wan Woo
Abstract:New ceramic composites that consist of the amorphous SiOC matrix having dispersoids of Mo4.8Si3C0.6 and some MoSi2 were synthesized, and...
165
Authors: Ju An Zhao
Abstract:A multi-layer coating SiC/ Si - MoSi2 /MoSi2 with good oxidation resistance has been developed by using the slurry-sintering method on the...
1
Authors: Bulent Önay
Abstract:Engineering materials with better high temperature oxidation properties are needed to increase the thermodynamic efficiencies of the energy...
354
Authors: Zhen Ting Wang, Gang Liang, Guo Gang Zhao
Abstract:In the surface of graphite electrode, the in-situ synthesized high temperature antioxidation composite coating is prepared, depending on...
42