Oxidation behavior and electrical property of ferritic stainless steel interconnects with a Cr–La alloying layer by high-energy micro-arc alloying process

Feng, Zongjian; Zeng, Chenghui

doi:10.1016/j.jpowsour.2010.06.016

Cited by 13 publications

(5 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(2) Step 2, HEMAA process: The alloys with some certain composition are deposited on the 430 SS substrate by HEMAA, which is a pulsed micro-welding technique with the instantaneous release of high current, resulting in a high cooling rate (~10 6 Ks -1 ). The microcrystalline or even nanocrystalline alloy layers are obtained and metallurgically bonded to the 430 SS substrate [6,12,14,17,21,22].…”

Section: Discussionmentioning

confidence: 99%

“…In recent attempts, the high-energy micro-arc alloying (HEMAA) process has been used to produce the metallurgically bonded alloy coatings which are then converted in-situ into spinel coatings by the thermal growth process [11][12][13][14][15]. Some reports have studied the oxidation behavior and electrical property of LaCrO3-based coatings, Mn-Co and Cr-La alloying layers deposited by the HEMAA process [16,17], confirming that the coating prepared by this process offers the excellent adhesion to the substrate and keeps low electrical contact resistance for the 3 interconnects.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The evolution of microstructure and electrical performance in doped Mn-Co and Cu-Mn oxide layers with the extended oxidation time

et al. 2020

View full text Add to dashboard Cite

Mn-Co and Cu-Mn based alloy coatings are deposited on 430 SS by high energy micro-arc alloying process, and then alloy coatings are oxidized at 750 ℃ in air to form the spinel oxides. Some composite oxides, such as Co3O4, Mn2O3 and (Mn,Co)3O4, are formed at the initial stage of oxidation. The single-phase spinel (pure MnCo2O4) without impurity phases is only found on the surface of Co-33Mn-17Cu oxide layer with the extended oxidation time, its area-specific resistance values at 500 ℃ to 800 ℃ are low and close to that of Mn-35Cu oxide layer which mainly composed of Cu1.2Mn1.8O4 spinel.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The evolution of microstructure and electrical performance in doped Mn-Co and Cu-Mn oxide layers with the extended oxidation time

et al. 2020

View full text Add to dashboard Cite

show abstract

“…It is economically attractive for coating preparation to significantly reduce the cost of SOFC. In previous study [9], the Cr/La alloying layer is successively obtained on 430 stainless steel (SS) surface by HEMAA using metallic Cr electrode and metallic La electrode, respectively. The result shows that a good protective perovskite coating with an acceptable electrical contact resistance forms on the substrate steel after coating is thermally grown.…”

Section: Introductionmentioning

confidence: 99%

Oxidation Characteristics and Electrical Properties of Doped Mn-Co Spinel Reaction Layer for Solid Oxide Fuel Cell Metal Interconnects

et al. 2018

View full text Add to dashboard Cite

Abstract:To prevent Cr poisoning of the cathode and to retain high conductivity during solid oxide fuel cell (SOFC) operation, Cu or La doped Co-Mn coatings on a metallic interconnect is deposited and followed by oxidation at 750 • C. Microstructure and composition of coatings after preparation and oxidation is analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). High energy micro arc alloying process, a low cost technique, is used to prepare Cu or La doped Co-Mn coatings with the metallurgical bond. When coatings oxidized at 750 • C in air for 20 h and 100 h, Co 3 O 4 is the main oxide on the surface of Co-38Mn-2La and Co-40Mn coatings, and (Co,Mn) 3 O 4 spinel continues to grow with extended oxidation time. The outmost scales of Co-33Mn-17Cu are mainly composed of cubic MnCo 2 O 4 spinel with Mn 2 O 3 after oxidation for 20 h and 100 h. The average thickness of oxide coatings is about 60-70 µm after oxidation for 100 h, except that Co-40Mn oxide coatings are a little thicker. Area-specific resistance of Cu/La doped Co-Mn coatings are lower than that of Co-40Mn coating. (Mn,Co) 3 O 4 /MnCo 2 O 4 spinel layer is efficient at blocking the outward diffusion of chromium and iron.

show abstract

“…Recently, lanthanum chromite (LaCrO 3 ) with the generalized perovskite structure has attracted extensive attentions owing to their potential technology applications [1][2][3][4]. For example, due to the superior electrical conductivity and high temperature stability, LaCrO 3 can be used as high temperature furnace electrodes and catalysts [1].…”

Section: Introductionmentioning

confidence: 99%

“…For example, due to the superior electrical conductivity and high temperature stability, LaCrO 3 can be used as high temperature furnace electrodes and catalysts [1]. Furthermore, in the solid oxide fuel cells (SOFCs) field, LaCrO 3 has also extensive applications referring to its stability under oxidizing and reducing atmospheres [3,4]. The crystal structures of LaCrO 3 have been characterized by Tompsett et al [5].…”

Section: Introductionmentioning

confidence: 99%

The Structural Stabilities and Electronic Properties of Orthorhombic and Rhombohedral LaCrO<sub>3</sub> — A First-Principles Study

Song

Zhao

et al. 2012

AMR

View full text Add to dashboard Cite

The equilibrium structures of orthorhombic LaCrO3(O-LaCrO3) and rhombohedral LaCrO3(R-LaCrO3) crystals were investigated by using the plane-wave self consistent field (PWSCF) method based on density functional theory (DFT). The optimized lattice parameters for both phases are in accordance with experimental results reported in literature, confirming the reliability of LSDA+U scheme used in the calculations. We have quantificationally investigated the binding energies and electronic properties of these two types of LaCrO3crystals. The negative total energy and binding energies indicate the ground state property and the good structrual stability of O-LaCrO3crystal, which is important for the preparation of nano materials, the synthesis of ceramic materials made of doped O-LaCrO3crytals, as well as their applications in high technology fields, and predict the metastable property of R-LaCrO3crystal. Furthermore, the band structures show that O-LaCrO3is a direct semiconductor with wide energy gap, while R-LaCrO3is an indirect semiconductor with narrow energy gap. The interaction between Cr and O atoms in O-LaCrO3crystal possesses the character of covalent bonding.

show abstract

Oxidation behavior and electrical property of ferritic stainless steel interconnects with a Cr–La alloying layer by high-energy micro-arc alloying process

Cited by 13 publications

References 24 publications

The evolution of microstructure and electrical performance in doped Mn-Co and Cu-Mn oxide layers with the extended oxidation time

The evolution of microstructure and electrical performance in doped Mn-Co and Cu-Mn oxide layers with the extended oxidation time

Oxidation Characteristics and Electrical Properties of Doped Mn-Co Spinel Reaction Layer for Solid Oxide Fuel Cell Metal Interconnects

The Structural Stabilities and Electronic Properties of Orthorhombic and Rhombohedral LaCrO<sub>3</sub> — A First-Principles Study

Contact Info

Product

Resources

About