Nanosegregation of ternary Cr-Ni-Fe alloy deposits electrodeposited from a Cr3+-based bath

Ching An Huang; Chao Yu Chen; Joachim Mayer; Thomas Weirich; Riza Iskandar

doi:10.1016/j.matlet.2012.11.033

Nanosegregation of ternary Cr-Ni-Fe alloy deposits electrodeposited from a Cr³⁺-based bath

Ching An Huang^*
, Chao Yu Chen
, Joachim Mayer
, Thomas Weirich
, Riza Iskandar

^*Corresponding author for this work

Department of Mechanical Engineering

Chang Gung University
RWTH Aachen University

Research output: Contribution to journal › Journal Article › peer-review

7 Scopus citations

Abstract

A laminar structure with nanosized segregation was observed in Cr-Ni-Fe alloy deposits electroplated in a Cr³⁺-based bath with Ni ²⁺ and Fe²⁺ ions. The formation of laminar structure could be attributed to the depletion of preferentially reduced ions, or cathodic polarization, adjacent to the cathodic surface. This nanosized segregation could be clearly observed with scanning-transmission-electron microscope in high-angle angular dark-field (HAADF) mode. A crystalline Fe-rich alloy deposit with a grain size of 4 nm can be achieved with an electroplating current density of 15 A dm^-2, whereas an amorphous Cr-rich alloy deposit was produced with 25 A dm^-2. Owing to the approach toward thermal equilibrium in the two-phase field, uphill diffusion took place in the Cr-rich alloy deposit during annealing at 500 °C, forming a Cr- and Fe-rich multilayer.

Original language	English
Pages (from-to)	107-110
Number of pages	4
Journal	Materials Letters
Volume	93
DOIs	https://doi.org/10.1016/j.matlet.2012.11.033
State	Published - 2013

Keywords

Electrodeposition
Electron microscopy
Microstructure
Multilayer structure

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10.1016/j.matlet.2012.11.033

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title = "Nanosegregation of ternary Cr-Ni-Fe alloy deposits electrodeposited from a Cr3+-based bath",

abstract = "A laminar structure with nanosized segregation was observed in Cr-Ni-Fe alloy deposits electroplated in a Cr3+-based bath with Ni 2+ and Fe2+ ions. The formation of laminar structure could be attributed to the depletion of preferentially reduced ions, or cathodic polarization, adjacent to the cathodic surface. This nanosized segregation could be clearly observed with scanning-transmission-electron microscope in high-angle angular dark-field (HAADF) mode. A crystalline Fe-rich alloy deposit with a grain size of 4 nm can be achieved with an electroplating current density of 15 A dm-2, whereas an amorphous Cr-rich alloy deposit was produced with 25 A dm-2. Owing to the approach toward thermal equilibrium in the two-phase field, uphill diffusion took place in the Cr-rich alloy deposit during annealing at 500 °C, forming a Cr- and Fe-rich multilayer.",

keywords = "Electrodeposition, Electron microscopy, Microstructure, Multilayer structure",

author = "Huang, \{Ching An\} and Chen, \{Chao Yu\} and Joachim Mayer and Thomas Weirich and Riza Iskandar",

year = "2013",

doi = "10.1016/j.matlet.2012.11.033",

language = "英语",

volume = "93",

pages = "107--110",

journal = "Materials Letters",

issn = "0167-577X",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Nanosegregation of ternary Cr-Ni-Fe alloy deposits electrodeposited from a Cr3+-based bath

AU - Huang, Ching An

AU - Chen, Chao Yu

AU - Mayer, Joachim

AU - Weirich, Thomas

AU - Iskandar, Riza

PY - 2013

Y1 - 2013

N2 - A laminar structure with nanosized segregation was observed in Cr-Ni-Fe alloy deposits electroplated in a Cr3+-based bath with Ni 2+ and Fe2+ ions. The formation of laminar structure could be attributed to the depletion of preferentially reduced ions, or cathodic polarization, adjacent to the cathodic surface. This nanosized segregation could be clearly observed with scanning-transmission-electron microscope in high-angle angular dark-field (HAADF) mode. A crystalline Fe-rich alloy deposit with a grain size of 4 nm can be achieved with an electroplating current density of 15 A dm-2, whereas an amorphous Cr-rich alloy deposit was produced with 25 A dm-2. Owing to the approach toward thermal equilibrium in the two-phase field, uphill diffusion took place in the Cr-rich alloy deposit during annealing at 500 °C, forming a Cr- and Fe-rich multilayer.

AB - A laminar structure with nanosized segregation was observed in Cr-Ni-Fe alloy deposits electroplated in a Cr3+-based bath with Ni 2+ and Fe2+ ions. The formation of laminar structure could be attributed to the depletion of preferentially reduced ions, or cathodic polarization, adjacent to the cathodic surface. This nanosized segregation could be clearly observed with scanning-transmission-electron microscope in high-angle angular dark-field (HAADF) mode. A crystalline Fe-rich alloy deposit with a grain size of 4 nm can be achieved with an electroplating current density of 15 A dm-2, whereas an amorphous Cr-rich alloy deposit was produced with 25 A dm-2. Owing to the approach toward thermal equilibrium in the two-phase field, uphill diffusion took place in the Cr-rich alloy deposit during annealing at 500 °C, forming a Cr- and Fe-rich multilayer.

KW - Electrodeposition

KW - Electron microscopy

KW - Microstructure

KW - Multilayer structure

UR - https://www.scopus.com/pages/publications/84871754167

U2 - 10.1016/j.matlet.2012.11.033

DO - 10.1016/j.matlet.2012.11.033

M3 - 文章

AN - SCOPUS:84871754167

SN - 0167-577X

VL - 93

SP - 107

EP - 110

JO - Materials Letters

JF - Materials Letters

ER -

Nanosegregation of ternary Cr-Ni-Fe alloy deposits electrodeposited from a Cr³⁺-based bath

Abstract

Keywords

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