Paper Title:
Analysis and Interpretation of Microstructures after Liquid Oxide Corrosion
  Abstract

Corrosion by liquid oxides is one of the most severe modes of degradations which limit the lifetime of the refractory linings. The study of the microstructures of corroded refractories provides essential information. However, the interpretation of the microscopic observations is difficult : - The refractories are multi-component and heterogeneous ceramics, - The microscopic observations are carried out at room temperature. They are not representative of the mineral and vitreous phases existing at high temperature, - During cooling, new solid phases appear by crystallization of liquid oxides. The composition of the vitreous phases also evolves with the temperature. Consequently, the information obtained is often limited. In this paper , we will present a method to analyse and interpret the microstructures of refractories after use. The concept of local thermodynamic equilibrium and the use of the phase rule make it possible to interpret the microstructures of corroded refractories, to explain the observed mineral zonation and to quantify the composition of the liquid phase at high temperature from chemical profiles established by S.E.M. Experimental data from corrosion of MgO-C, Al2O3-MgO and high alumina refractories will illustrate and validate this theoretical approach.

  Info
Periodical
Edited by
Pietro VINCENZINI and James P. BENNETT
Pages
114-129
DOI
10.4028/www.scientific.net/AST.70.114
Citation
J. Poirier, "Analysis and Interpretation of Microstructures after Liquid Oxide Corrosion", Advances in Science and Technology, Vol. 70, pp. 114-129, 2010
Online since
October 2010
Authors
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: Rui Na Ma, Sha Sha Jin, Hong Yun Li
Metal Alloy Materials
Abstract:The static constant corrosion tests on Fe-B eutectic alloy are investigated in liquid zinc at 500°C. The systematic observation and research...
805
Authors: Shao Hua Wang, Cheng Ji Deng, Hong Xi Zhu, Wen Jie Yuan
Chapter 3: Ceramics for Structural Applications
Abstract:The in situ nitrides bonded MgAl2O4-C refractories were prepared by using high quality fused spinel...
591
Authors: Lenka Nevrivova
Chapter 2: Additives and Admixtures
Abstract:The paper focuses on the determination of how periclase content in the raw material influences the final properties of no-cement refractory...
81