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Oxidation Resistance of α‐Al 2 O 3 infiltrated Open Porous Cellular Iron
Author(s) -
Hajas D.E.,
Jiang Y.,
Angel S.,
Schulze S.L.,
Bleck W.,
Schneider J.M.
Publication year - 2010
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.201000117
Subject(s) - porosity , infiltration (hvac) , materials science , scanning electron microscope , chemical engineering , transmission electron microscopy , redox , porous medium , limiting , metallurgy , composite material , nanotechnology , mechanical engineering , engineering
Open porous cellular iron exhibits low oxidation resistance which is limiting their use for application at room and elevated temperatures. Here we deposit α‐Al 2 O 3 by Chemical Vapor Infiltration (CVI) to enhance oxidation resistance. The oxidation resistance before and after CVI is investigated by thermo gravimetrical analysis (TGA). The reaction products, surface morphologies and cross sections are investigated by X‐ray diffraction, chemical analysis and electron microscopy. α‐Al 2 O 3 infiltrated cellular iron samples exhibit up to 6 orders of magnitude lower oxidation rate at an oxidation temperature of 600 °C, compared to the unprotected cellular iron. In addition, the infiltrated sample shows good resistance during thermal cycling up to this temperature.