Authors:
G. VourliasAristotle University of Thessaloniki Department of Physics 541 24 Thessaloniki Greece

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N. PistofidisAristotle University of Thessaloniki Department of Physics 541 24 Thessaloniki Greece

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E. PavlidouAristotle University of Thessaloniki Department of Physics 541 24 Thessaloniki Greece

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K. ChrissafisAristotle University of Thessaloniki Department of Physics 541 24 Thessaloniki Greece

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Abstract  

In the present work the oxidation behavior of ageing treated steel was examined up to 1000°C in different environments (O2 and CO2) and with different heating rates. The examination was conducted by means of thermogravimetric analysis, scanning electron microscopy and X-ray diffraction. In this study it was deduced that in the case of O2 an oxide scale is formed on top of the steel. The oxidation is uniform and the growth of the scale is more intent at low heating rate. It consist of different Fe, Mn, Mo and Cr oxides which are adjusted in the form of layers. This phenomenon was explained by the different diffusion coefficients of each metal in the already formed scale. Regarding the oxidation in CO2, the scale formation takes place at a lower temperature than in the case of O2. Hence the examined substrate is more vulnerable in CO2.

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
1
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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Geopolymers

Inorganic polymeric new materials

Author:
J. Davidovits