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Title: Wetting and Reaction Characteristics of Al2O3/SiC Composite Refractories

Abstract

The reactive wetting behavior of three types of alumina-silicon carbide composite refractory materials was investigated in contact with molten aluminum (Al) and Al alloy using an optimized sessile drop method at 900oC in a purified Ar-4% H2 atmosphere. The time dependent behavior of contact angle and droplet geometry was monitored and the wetting kinetics was identified. The initial contact angle between the liquid Al/Al alloy and two of the refractory substrates was found to be an obtuse angle, which gradually changed to a 90o angle and then eventually to an acute angle with time. However, the wetting angle for the third refractory substrate was found to stay at an obtuse angle for the entire two-hour duration of the experiment. The difference in wetting properties among three types of refractories is attributed to be due to their microstructural and compositional variations. The significant effect of the alloying magnesium added to the molten Al alloy droplets in regard to the wetting kinetics and the influence on the reaction with the refractory substrates is discussed. The results obtained provide important understanding on the wetting and corrosion mechanisms of alumina and silicon carbide materials in contact with molten aluminum.

Authors:
 [1];  [1];  [1];  [1];  [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
931048
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: International Journal of Applied Ceramic Technology; Journal Volume: 4; Journal Issue: 6
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALLOYS; ALUMINIUM; CARBIDES; CORROSION; GEOMETRY; KINETICS; MAGNESIUM; REFRACTORIES; SILICON CARBIDES; SUBSTRATES; COMPOSITE MATERIALS

Citation Formats

Xu, Jing, Hemrick, James Gordon, Peters, Klaus-Markus, Liu, Xingbo, and Barbero, Ever J. Wetting and Reaction Characteristics of Al2O3/SiC Composite Refractories. United States: N. p., 2007. Web. doi:10.1111/j.1744-7402.2007.02177.x.
Xu, Jing, Hemrick, James Gordon, Peters, Klaus-Markus, Liu, Xingbo, & Barbero, Ever J. Wetting and Reaction Characteristics of Al2O3/SiC Composite Refractories. United States. doi:10.1111/j.1744-7402.2007.02177.x.
Xu, Jing, Hemrick, James Gordon, Peters, Klaus-Markus, Liu, Xingbo, and Barbero, Ever J. Mon . "Wetting and Reaction Characteristics of Al2O3/SiC Composite Refractories". United States. doi:10.1111/j.1744-7402.2007.02177.x.
@article{osti_931048,
title = {Wetting and Reaction Characteristics of Al2O3/SiC Composite Refractories},
author = {Xu, Jing and Hemrick, James Gordon and Peters, Klaus-Markus and Liu, Xingbo and Barbero, Ever J},
abstractNote = {The reactive wetting behavior of three types of alumina-silicon carbide composite refractory materials was investigated in contact with molten aluminum (Al) and Al alloy using an optimized sessile drop method at 900oC in a purified Ar-4% H2 atmosphere. The time dependent behavior of contact angle and droplet geometry was monitored and the wetting kinetics was identified. The initial contact angle between the liquid Al/Al alloy and two of the refractory substrates was found to be an obtuse angle, which gradually changed to a 90o angle and then eventually to an acute angle with time. However, the wetting angle for the third refractory substrate was found to stay at an obtuse angle for the entire two-hour duration of the experiment. The difference in wetting properties among three types of refractories is attributed to be due to their microstructural and compositional variations. The significant effect of the alloying magnesium added to the molten Al alloy droplets in regard to the wetting kinetics and the influence on the reaction with the refractory substrates is discussed. The results obtained provide important understanding on the wetting and corrosion mechanisms of alumina and silicon carbide materials in contact with molten aluminum.},
doi = {10.1111/j.1744-7402.2007.02177.x},
journal = {International Journal of Applied Ceramic Technology},
number = 6,
volume = 4,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}