Abstract
The effect of mechanical milling on the oxidation kinetics of ultrafine iron powders was investigated by thermogravimetric (TG) analysis. The initial α-Fe powder with average particles size of 100 nm was made by the electric explosion of wire. The milling of iron powder was carried out by AGO-2S planetary ball mill using a rotation speed of 2220 rpm and the milling times of 15 and 40 min. According to the XRD data, the main content of α-Fe was observed in all samples. However, a certain amount (~ 20 mass%) of wustite phase (FeO) is formed after ball milling of ultrafine iron powders. From TG analysis, the powders milling leads to increase in the temperature of thermal oxidation onset and shifts the reaction to higher temperatures. A model-free isoconversional method of the Friedman analysis was employed only in a first qualitative approximation. More accurate kinetics parameters were obtained using the multivariate nonlinear regressions, where three-step reaction with branching set of n-order equations for each step was chosen.
| Original language | English |
|---|---|
| Pages (from-to) | 1-6 |
| Number of pages | 6 |
| Journal | Journal of Thermal Analysis and Calorimetry |
| DOIs | |
| Publication status | Accepted/In press - 4 Jun 2018 |
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Keywords
- Mechanical milling
- Oxidation kinetic
- Thermogravimetric analysis
- Ultrafine iron powders
ASJC Scopus subject areas
- Condensed Matter Physics
- Physical and Theoretical Chemistry
Cite this
The oxidation kinetic study of mechanically milled ultrafine iron powders by thermogravimetric analysis. / Lysenko, Elena N.; Surzhikov, Anatoly P.; Nikolaev, Evgeniy V.; Vlasov, Vitaly A.; Zhuravkov, Sergey P.
In: Journal of Thermal Analysis and Calorimetry, 04.06.2018, p. 1-6.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The oxidation kinetic study of mechanically milled ultrafine iron powders by thermogravimetric analysis
AU - Lysenko, Elena N.
AU - Surzhikov, Anatoly P.
AU - Nikolaev, Evgeniy V.
AU - Vlasov, Vitaly A.
AU - Zhuravkov, Sergey P.
PY - 2018/6/4
Y1 - 2018/6/4
N2 - The effect of mechanical milling on the oxidation kinetics of ultrafine iron powders was investigated by thermogravimetric (TG) analysis. The initial α-Fe powder with average particles size of 100 nm was made by the electric explosion of wire. The milling of iron powder was carried out by AGO-2S planetary ball mill using a rotation speed of 2220 rpm and the milling times of 15 and 40 min. According to the XRD data, the main content of α-Fe was observed in all samples. However, a certain amount (~ 20 mass%) of wustite phase (FeO) is formed after ball milling of ultrafine iron powders. From TG analysis, the powders milling leads to increase in the temperature of thermal oxidation onset and shifts the reaction to higher temperatures. A model-free isoconversional method of the Friedman analysis was employed only in a first qualitative approximation. More accurate kinetics parameters were obtained using the multivariate nonlinear regressions, where three-step reaction with branching set of n-order equations for each step was chosen.
AB - The effect of mechanical milling on the oxidation kinetics of ultrafine iron powders was investigated by thermogravimetric (TG) analysis. The initial α-Fe powder with average particles size of 100 nm was made by the electric explosion of wire. The milling of iron powder was carried out by AGO-2S planetary ball mill using a rotation speed of 2220 rpm and the milling times of 15 and 40 min. According to the XRD data, the main content of α-Fe was observed in all samples. However, a certain amount (~ 20 mass%) of wustite phase (FeO) is formed after ball milling of ultrafine iron powders. From TG analysis, the powders milling leads to increase in the temperature of thermal oxidation onset and shifts the reaction to higher temperatures. A model-free isoconversional method of the Friedman analysis was employed only in a first qualitative approximation. More accurate kinetics parameters were obtained using the multivariate nonlinear regressions, where three-step reaction with branching set of n-order equations for each step was chosen.
KW - Mechanical milling
KW - Oxidation kinetic
KW - Thermogravimetric analysis
KW - Ultrafine iron powders
UR - http://www.scopus.com/inward/record.url?scp=85047986156&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85047986156&partnerID=8YFLogxK
U2 - 10.1007/s10973-018-7451-0
DO - 10.1007/s10973-018-7451-0
M3 - Article
SP - 1
EP - 6
JO - Journal of Thermal Analysis and Calorimetry
JF - Journal of Thermal Analysis and Calorimetry
SN - 1388-6150
ER -