Oxidation of Fe–Si, Fe–Al and Fe–Si–Al alloys in CO2–H2O gas at 800°C

Li, Huan; Zhang, Jianqiang; Young, David J.

doi:10.1016/j.corsci.2011.09.006

Cited by 32 publications

(15 citation statements)

References 37 publications

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“…In fact, besides the spherical particles, the alloy shows also the formation of a branched SiO 2 network. A similar phenomenon has also been observed in the oxidation of Fe-5.83 at.% Si [18,19] under oxygen pressures sufficiently large to form the iron oxides. These SiO 2 particles with complex shapes resulted from a breakdown of the SiO 2 layer connected directly with the base alloy.…”

Section: The Formation Mechanisms Of the Anomalous Internal Oxidationmentioning

confidence: 48%

“…Up to now, the oxidation of Fe-Si alloys with different silicon contents has been the subject of many investigations in different atmospheres, including air [1][2][3][4][5][6], pure O 2 [7][8][9], CO 2 +CO [10][11][12] [20,21]. In these studies, the internal oxidation of silicon in Fe-Si alloys has been observed both in the presence [2,5,7,13,[16][17][18][19][20] and in the absence [14,15,21] of external iron oxides. In the latter case, when the silicon content was less than 2 at.%, the M a n u s c r i p t 2 shape of the SiO 2 particles was spherical [21], while for larger silicon contents, for example 5 at.% and 9 at.%, dendritic SiO 2 particles started to appear and were associated with the appearance of a thin continuous SiO 2 layer at the interface between the internal oxidation zone (ioz), and the base alloy [14].…”

Section: Introductionmentioning

confidence: 99%

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Anomalous oxidation of Fe–Si alloys under a low oxygen pressure at 800 °C

et al. 2015

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Section: The Formation Mechanisms Of the Anomalous Internal Oxidationmentioning

confidence: 48%

Section: Introductionmentioning

confidence: 99%

Anomalous oxidation of Fe–Si alloys under a low oxygen pressure at 800 °C

et al. 2015

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“…Because of mechanical properties and outstanding oxidation resistance at high temperature, Fe-based superalloy GH1131 becomes an applicable option to be used as aero-engine Venturi. Massive carbon deposition often occurs on the inner surface of aero-engine Venturi during the fuel atomization, which decreases the atomization efficiency and mechanical properties [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Effect of yttrium on the coking behavior of Fe-based superalloy in heavy hydrocarbon

Zhu

Zhou

2015

Corrosion Science

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“…The first two ones, which are in fact ordered solid solutions, have gained technical importance. Materials based on these phases have been thoroughly and successfully tested for oxidation resistance in the air, as well as sulphur-containing environments, carbon dioxide with water vapor, salts, electrolytes, and even the glass melts [2,[5][6][7][8][9][10]. The special "Exo-Melt" process [11] and casting have been proposed as the manufacturing route of such materials.…”

Section: Introductionmentioning

confidence: 99%

Effect of Nickel and Titanium on Properties of Fe-Al-Si Alloy Prepared by Mechanical Alloying and Spark Plasma Sintering

et al. 2020

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F.P.) 2 SVÚOM s.r.o., U Měšt'anského pivovaru 934/4, Abstract: This paper describes the structure and properties of an innovative Fe-Al-Si alloy with a reduced amount of silicon (5 wt. %) in order to avoid excessive brittleness. The alloy was produced by a combination of mechanical alloying and spark plasma sintering. Nickel and titanium were independently tested as the alloying elements for this alloy. It was found that wear resistance, which reached values comparable with tool steels, could be further improved by the addition of nickel. Nickel also improved the high-temperature oxidation behavior, because it lowers the liability of the oxide layers to spallation. Both nickel and titanium increased the hardness of the alloy. Titanium negatively influenced oxidation behavior and wear resistance because of the presence of titanium dioxide in the oxide layer and the brittle silicides that caused chipping wear, respectively. plasma sintering [16]. The alloys exhibited a very good oxidation resistance at high temperatures-much better than binary Fe-Al and Fe-Si alloys [17]. The improvement of oxidation resistance does not lie in the incorporation of silicon to the oxide layer in a significant amount; rather, it lies in the formation of large volume fraction of silicides under the oxide layer, when aluminum diffuse to the surface in order to form Al 2 O 3 . Additionally, it has been found that the presence of silicon reduces the amount of iron oxide in scales, causing their better adherence to a substrate due to a more favorable Pilling-Bedworth ratio [16]. However, the FeAl20Si20 alloy is very brittle. Powder metallurgy methods, including our high-energy mechanical alloying [18] and spark plasma sintering, allowed for an increase in the fracture toughness, but the values at room temperature still reached the parameters of brittle ceramics, i.e., approximately 3.5 MPa.m 1/2 [16]. Due to these parameters, the alloy could be applicable as a protective coating rather than as a bulk material.In recent research, we studied the high-temperature oxidation resistance of Fe-Al-Si alloys and its dependence on the Al:Si ratio, and we found that the 35:5 provided almost the same oxidation performance [17]. Since silicon is listed as a critical raw material in the EU [19], the minimization of its amount is reasonable. In a parallel research, our team studied Ti-Al alloys and proved that silicon also improves their oxidation behavior and reinforces the material by forming hard Ti 5 Si 3 silicides [20]. On the other hand, nickel is known to form stable aluminides rather than silicides [21].Therefore, this work aimed at a possible improvement of the properties of a lower-silicon FeAl35Si5 alloy by the addition of titanium as the expected silicide-forming element and nickel as the probable aluminide stabilizer. The tests were intended to study the high temperature oxidation behavior, basic mechanical properties, and tribological properties. Materials and Methods

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Oxidation of Fe–Si, Fe–Al and Fe–Si–Al alloys in CO2–H2O gas at 800°C

Cited by 32 publications

References 37 publications

Anomalous oxidation of Fe–Si alloys under a low oxygen pressure at 800 °C

Anomalous oxidation of Fe–Si alloys under a low oxygen pressure at 800 °C

Effect of yttrium on the coking behavior of Fe-based superalloy in heavy hydrocarbon

Effect of Nickel and Titanium on Properties of Fe-Al-Si Alloy Prepared by Mechanical Alloying and Spark Plasma Sintering

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