Amorphization of electrodeposited FeW alloy films and electrochemical behavior

Ruan, Yongfeng; Yao, Sheng; Kowaka, Masamichi

doi:10.1016/0022-3093(90)90638-3

Cited by 14 publications

(3 citation statements)

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“…19) This phenomenon can be attributed to the electrochemical process of electrodeposited films formation. 20) The metallic ions in aqueous electrolyte discharge at a potential of several eV, and are electrodeposited as neutral atoms, so that the formed ad-atoms possess very high energy. Since many ad-atoms are deposited simultaneously and continuously, the surface of electrodeposited film can be considered as a molten state or high-temperature state.…”

Section: Amorphous Phase Formation In the Deposited Filmsmentioning

confidence: 99%

Relationship between the Crystallographic Structure of Electrodeposited Fe-P Alloy Film and its Thermal Equilibrium Phase Diagram

Wang

Itoh²,

Watanabe

2003

Mater. Trans.

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The crystallographic structures and surface morphologies of Fe-P binary alloy films electrodeposited at different bath concentrations and different electrodeposition conditions have been studied in detail by means of XRD, HRTEM and SEM. The crystallization sequences of deposited films under the heat-treatment were analyzed with the help of XRD. The crystallographic structures of Fe-P deposited films were also compared with the Fe-P thermal equilibrium phase diagram. The results indicate that the crystallographic structures of Fe-P deposited films gradually change from crystalline to amorphous phase with increasing P content in the deposited films. The deposited film exists as -Fe supersaturated solid solution when the P compositions in deposited film are below 20.5 at%, whereas it exists as a homogenous amorphous phase when the P compositions in the deposited films are from 22.2 at% to 30.1 at%. Accordingly, the composition of boundary between the crystalline and homogenous amorphous regions can be determined at about 21.4 at% P content.

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Section: Amorphous Phase Formation In the Deposited Filmsmentioning

confidence: 99%

Relationship between the Crystallographic Structure of Electrodeposited Fe-P Alloy Film and its Thermal Equilibrium Phase Diagram

Wang

Itoh²,

Watanabe

2003

Mater. Trans.

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“…8) This phenomenon could be attributed to the electrochemical process of electrodeposited film formation. 9) In general, the metallic ions discharge at the potential of several eV, and are electrodeposited as neutral atoms, so that the formed ad-atoms possess very high energy. Since many adatoms are deposited simultaneously and continuously, the surface of electrodeposited film can be considered as a molten state or high-temperature state.…”

Section: Meta-stable and Amorphous Phase Formation In Thementioning

confidence: 99%

Relationship between the Crystallographic Structure of Electrodeposited Fe-Cr Alloy Film and Its Thermal Equilibrium Diagram

2002

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The crystallographic structure and morphology of electrodeposited Fe-Cr films under different bath conditions were studied in detail by using XRD, HRTEM and SEM. The crystallographic structures of the Fe-Cr electrodeposits were also compared with the Fe-Cr thermal equilibrium diagram. The results indicated that the crystallographic structure of electrodeposited Fe-Cr alloy film gradually changed from microcrystalline to amorphous with increasing Cr content. The deposited film exists as α-Fe solid solution when the Cr compositions of deposited films are below 3.1 at%, whereas, it existed as a meta-stable crystal when the Cr compositions of deposited films are from 4.5 at% to 22.4 at%, which have not been reported up to now. The deposited films with various Cr compositions from 22.9 at% to 74.4 at% chromium exist as amorphous phase. Hence, the crystallographic structure of the electrodeposited Fe-Cr alloy film is closely related to its thermal equilibrium diagram, but does not always agree with it.

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“…Unlike Cr platings, which gradually decrease in hardness at temperatures above 400 °C, 32 the hardness of Fe-W alloys is retained or even increased at high temperatures. 33,34 Considering the thermal operating range of Cr platings, thermal stability is an important property. On the other hand, Fe-W alloys have inferior corrosion resistance to Cr and Ni-W alloy platings.…”

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confidence: 99%

Electrodeposition of a Novel Ternary Fe–W–Zn Alloy: Tuning Corrosion Properties of Fe–W Based Alloys by Zn Addition

Park

Hagio

Kamimoto

et al. 2020

J. Electrochem. Soc.

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Herein, we report the electrodeposition of a novel ternary Fe-W-Zn alloy. Ternary alloys with compositions of at.%) W-(1.73-8.16 at.%) Zn were prepared by potentiostatic deposition in citrate-ammonia aqueous solution equipped with an anode chamber. The electrodeposition behavior of the ternary Fe-W-Zn alloys and the effect of the Zn addition were analyzed by cyclic voltammetry and in situ electrochemical quartz crystal microbalance measurements. Ternary alloys with glossy appearances and smooth surface morphologies were fabricated, with a maximum current efficiency of approximately 43%. Incorporating Zn into the Fe-W alloy structure transformed the alloy structure into an amorphous-like nanocrystalline structure and refined the crystal size to a minimum of 1.45 nm. Potentiodynamic polarization test results showed that the corrosion resistance of the ternary Fe-W-Zn alloy with approximately 2 at.% Zn was distinctly improved compared to the binary Fe-W alloy, both in 1 M H 2 SO 4 solution and neutral 3 mass% NaCl solution. Notably, the corrosion resistance was even better than Ni-W alloy in 1 M H 2 SO 4 solution, with its unique passivation behavior. The incorporation of Zn was found to be effective for tuning the corrosion properties of Fe-W alloys.

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Amorphization of electrodeposited FeW alloy films and electrochemical behavior

Cited by 14 publications

References 0 publications

Relationship between the Crystallographic Structure of Electrodeposited Fe-P Alloy Film and its Thermal Equilibrium Phase Diagram

Relationship between the Crystallographic Structure of Electrodeposited Fe-P Alloy Film and its Thermal Equilibrium Phase Diagram

Relationship between the Crystallographic Structure of Electrodeposited Fe-Cr Alloy Film and Its Thermal Equilibrium Diagram

Electrodeposition of a Novel Ternary Fe–W–Zn Alloy: Tuning Corrosion Properties of Fe–W Based Alloys by Zn Addition

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