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Wetting conditions and microstructural characteristics of a fired B 4 C‐containing MgO carbon brick
Author(s) -
RymonLipinski Tadeusz,
Fichtner Ralf
Publication year - 1992
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.199201754
Subject(s) - boron carbide , brick , materials science , wetting , boron , periclase , metallurgy , carbide , carbon fibers , magnesium , layer (electronics) , microstructure , composite material , chemistry , composite number , organic chemistry
This investigation is a continuation of the studies of the use of boron carbide as an antioxidant in refractory carbon‐containing materials. The previous studies were concerned with the stability of boron carbide at high temperatures. The present work gives an account of the wetting conditions and microstructural characteristics of a fired MgO‐C brick containing boron carbide additive. The results obtained show that a contribution may be made to the oxidation‐inhibiting protective action of the carbide by the formation of a continuous network of dense bridges of borate melts between periclase grains. A white layer with a high percentage of magnesium borate is produced between the decarbonized and non‐decarbonized material. The nature of this layer is similar to that from secondary MgO in MgO‐C bricks with no additive. The occurrence of this layer is the subject of further research.