Porous FeAl alloys via powder sintering: Phase transformation, microstructure and aqueous corrosion behavior

Chen, Gang; Liss, Klaus-Dieter; Chen, Chao; He, Yuehui; Qu, Xuanhui; Cao, Peng

doi:10.1016/j.jmst.2021.01.029

Cited by 20 publications

(3 citation statements)

References 29 publications

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“…The increase in temperature was beneficial to the formation of iron-containing aluminum compounds, namely FeAl and Al2O3, in the low alumina high iron due to the different entropy. The FeAl phase material was similar to the β2 phase in the binary phase of iron aluminum and became the electroactive points [22]. Therefore, this area firstly displayed pitting corrosion because the self-corrosion current was large, and the self-corrosion potential was low.…”

Section: Discussionmentioning

confidence: 97%

Effect of Chloride and Iodide on the Corrosion Behavior of 13Cr Stainless Steel

Liu

Hong

et al. 2022

Metals

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The corrosion behavior and mechanism of 13Cr stainless steel in the solution with 1 mol/L NaCl and 5 mmol/L KI were investigated by weight loss method, scanning electrochemical microscopy (SECM), the phase analysis (XRD) of inclusions, and surface analysis technique (SEM and EDS). Results showed that the corrosion rate was a linear relationship with the time and Cl− concentration. The corrosion became serious with the increase in time and Cl− concentration. The corrosion occurred in the unstable electroactive points that contained aluminum oxide and metallic phase inclusions. The generation and disappearance of the electroactive points simultaneously occurred with the corrosion. The active dissolved level on different areas of the surface of 13Cr stainless-steel sample was different. The oxidation current peak of the sample presented the strip shape. The corrosion dissolution was mainly caused by aluminum oxide inclusions (Al2O3) and FeAl phase.

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Section: Discussionmentioning

confidence: 97%

Effect of Chloride and Iodide on the Corrosion Behavior of 13Cr Stainless Steel

Liu

Hong

et al. 2022

Metals

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“…The applied pressure was 300 MPa and the holding time was 5 min. Subsequently, the green compacts were heated to 700 • C with a series of heating rates (2,5,10,12,15,20 C min − 1 ) in a tube furnace (OTF-1200X, China) under H 2 atmosphere (200 mL m − 1 , 99.99%). After the furnace cooled to the room temperature, obtained samples were transferred out of the furnace.…”

Section: Raw Materials and Preparation Processmentioning

confidence: 99%

“…Owing to high porosity, stable pore structure, excellent corrosion and oxidation resistance at high temperature, porous Al-based intermetallic compounds (Fe-Al, Cu-Al, Co-Al, Ni-Al) demonstrate promising potential in various applications, such as filtration, purification, flow control. In particular, porous NiAl compounds have become a research hotspot for their excellent heat conduction, oxidation resistance, and weldability [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Effect of the heating rate on the thermal explosion behavior and oxidation resistance of 3D-structure porous NiAl intermetallic

Cai

Cao

et al. 2022

Materials Characterization

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Fabrication of a Porous Fe–Al Intermetallic Alloy with Ultrahigh Open Porosity

Wang

et al. 2023

Adv Eng Mater

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Herein, a porous Fe–Al intermetallic material with ultrahigh open porosity is prepared via the multistep sintering process using a Fe–Al–Mn powder mixture as the raw material. The microstructure, phase composition, Mn sublimation, and open porosity of the sintered Fe–Al–Mn compacts are investigated. The compacts sintered at temperatures ≤700 °C are composed of the newly formed Fe/Mn‐based solid solutions, intermetallic phases, and the original elemental particles without the sublimation of Mn. The open porosities of the 650‐ and 700 °C‐sintered compacts are ≈39.83 and ≈47.19 vol%, respectively. After sintering at 1250 °C, Mn is rarely left in the porous body, and a single Fe–Al intermetallic phase with an even chemical composition is generated. The open porosity of the 1250 °C‐sintered compacts is ≈66.67 vol%, superior to other reported porous Fe–Al materials, and its strength is ≈22.5 MPa, which is competitive as well. This work may open a new strategy to design and optimize the high‐quality porous Fe–Al alloy in future.

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Porous FeAl alloys via powder sintering: Phase transformation, microstructure and aqueous corrosion behavior

Cited by 20 publications

References 29 publications

Effect of Chloride and Iodide on the Corrosion Behavior of 13Cr Stainless Steel

Effect of Chloride and Iodide on the Corrosion Behavior of 13Cr Stainless Steel

Effect of the heating rate on the thermal explosion behavior and oxidation resistance of 3D-structure porous NiAl intermetallic

Fabrication of a Porous Fe–Al Intermetallic Alloy with Ultrahigh Open Porosity

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