Mullite and spessartite in glassy matrix of manganese oxide-alumina-silica


Figure 1: Mullite and spessartite in glassy matrix of manganese oxide-alumina-silica, Mag. 800 X, scale bar: 50 µm.

Inclusion name: Mullite and spessartite
Record No.: 32
Inclusion formula: Mullite: 3Al2O3 x 2SiO2, spessartite: 3MnO x Al2O3 x 3SiO2
Inclusion type (Macro/Micro/Nano): Macro
Inclusion type (Exogenous/Indigenous): Indigenous
Inclusion classification: Oxide
Inclusion composition in weight %: Mu-Mullite with 26% SiO2 and 66% Al2O3. S-Spessartite with 38% MnO, 45% SiO2, 16% Al2O3. Sd-sulfide of MnS-type, M-matrix not analysed.
Sample: Basic open-hearth steel, ferrosilicon killed before tapping, after killed with aluminium. From a forged roll, normalized, air-hardened and tempered.
Steel composition in weight %: 0.62% C, 0.26% Si, 0.79% Mn, 0.015% P, 0.018% S, 0.65% Cr, 0.07% Ni.
Note: No data
Reference: Not shown in this demo version.





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