Effects of CaO on the compaction and sintering by plasma of Powder-metallurgical iron

This work the effect of the addition of Calcium Oxide (CaO) in the compaction and sintering of powder metallurgical iron Ancoor Steel 1000® is studied. Iron samples were made with proportions of: 0.5%, 1%, 1.5% and 2% by weight of CaO. The samples were sintered in a luminescent discharge furnace, in...

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Published inJournal of physics. Conference series Vol. 935; no. 1; pp. 12046 - 12050
Main Authors Ariza Suarez, H G, Santos, A Sarmiento, Ortiz Otálora, C A
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.12.2017
Subjects
Calcium oxide
Electrochemical impedance spectroscopy
Hematite
Lime
Metallurgical analysis
Physics
Powder metallurgy
Sintering (powder metallurgy)
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Summary:This work the effect of the addition of Calcium Oxide (CaO) in the compaction and sintering of powder metallurgical iron Ancoor Steel 1000® is studied. Iron samples were made with proportions of: 0.5%, 1%, 1.5% and 2% by weight of CaO. The samples were sintered in a luminescent discharge furnace, in an atmosphere of H2+Ar at a temperature of 1150°C. XRD analysis was used to determine the formation of compounds, this analysis evidenced the formation of: hematite and magnetite, which were found both on the surface and in the volume. A characterization of the ability to protect against corrosive effects was carried out using the EIS electrochemical impedance spectroscopy method on the samples, in a solution of 1000ppm of chloride, with this procedure it was found that at a concentration of 0.5% and 1% CaO, the electrochemical impedance value is increased with values of 11.7MΩ, 2.2MΩ respectively.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/935/1/012046