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Wetting Behavior between Fayalite‐Type Slags and Solid Magnesia
Author(s) -
Fukuyama Hiroyuki,
Donald Jeffrey R.,
Toguri James M.
Publication year - 1997
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1997.tb03112.x
Subject(s) - fayalite , wetting , wüstite , sessile drop technique , magnesium , slag (welding) , olivine , mineralogy , oxygen , oxide , phase (matter) , materials science , metallurgy , chemistry , analytical chemistry (journal) , composite material , chromatography , organic chemistry
The wetting behavior of single‐crystalline magnesia (MgO) by fayalite‐type slag melts has been studied by the sessile‐drop technique, which incorporates high‐temperature X‐ray radiography. The experiments have been performed under oxygen partial pressures of 106 and 104 Pa at a temperature of 1473 K. The mass ratios of iron to silica, Fe/SiO 2 , in the slag that has been used are 1.44 and 2.05. Infiltration behavior of a fayalite‐type slag into MgO are discussed, based on the experimental results that involve wettability and surface tension. Two phases—magnesio‐wustite and olivine—are observed at the interface. Interdiffusivity in the magnesiowustite solid solution has been determined as a function of the iron oxide content. To investigate the interfacial reaction, experiments that use high‐density MgO crucibles also have been conducted. Phase relations between the magnesiowustite and the olivine, and the rate of growth of the phases, are discussed.