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Paper Information

Journal:   INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE (ENGLISH)   Spring 2003 , Volume 14 , Number 2; Page(s) 65 To 77.
 
Paper: 

THE EFFECT OF ALUMINUM POWDER ADDITION ON PHASE TRANSFORMATION IN MAGNESIA- GRAPHITE REFRACTORIES

 
 
Author(s):  MIRHABIBI A.R., BAVAND-VAND-CHALI M., GOLESTANIFARD F.
 
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Abstract: 
In the persent work the effect of Al in magnesia-graphite refractories(MGR) on phase transformation has been investigated. Small disc shape sample were prepared by using proper starting materials and different amounts of Al powder. Then the samples were heat treated in a carbon bed in temperature range of 600-1400°C DTA/TG, XRD and SEM were used to analyse the sequences of the thermal enents and microstructural characterization. Results show that at temperature around 800°C carbide and nitride of Al formed due to the reaction of Al melt with carbon and nitrogen in the media. Above 1000°C spinel formed. Around 1200°Cby decreasing amount of Al__4 C__3 spinel phase increased and at 1400°C the major formed phases are spinel and ALN. ALN phase and Al__4 C__3 had needle and platelet shape respectively
 
Keyword(s):  REFRACTIORIES, MAGNESIA- GRAPHITE, MGO-C, ANTIOXIDANT, OXIDATION RESISTANCE.
 
References: 
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