Microstructure evolution and hardening mechanisms of Ni-P electrodeposits

Hsien Chung Huang; Sung Ting Chung; Szu Jung Pan; Wen Ta Tsai; Chao Sung Lin

doi:10.1016/j.surfcoat.2010.08.115

Microstructure evolution and hardening mechanisms of Ni-P electrodeposits

Hsien Chung Huang, Sung Ting Chung, Szu Jung Pan, Wen Ta Tsai, Chao Sung Lin

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

45 Citations (Scopus)

Abstract

Ni-P alloy coatings with different phosphorus contents were prepared by electroplating in a nickel sulfate bath containing phosphorous acid (H₃PO₃). Hardening mechanism, such as dispersion hardening of Ni nano crystals in amorphous matrix of the as-deposited Ni-P coating and coarsening weakening of Ni₃P for the high P coating after 1h of heat treatment at 400°C were concluded from the experimental data. Hardening mechanism of Ni-P alloys were further discussed based on the microstructure evolution with increasing deposit P content and during the heat treatment by using high resolution TEM (HR-TEM). A maximum hardness was observed for the as-deposited and heat-treated Ni-P alloys with 4wt% and 6wt% P, respectively. These composition ranges corresponding to the microstructure with high hardness proposed are believed to be useful for the industrial applications and further study.

Original language	English
Pages (from-to)	2097-2103
Number of pages	7
Journal	Surface and Coatings Technology
Volume	205
Issue number	7
DOIs	https://doi.org/10.1016/j.surfcoat.2010.08.115
Publication status	Published - 2010 Dec 25

All Science Journal Classification (ASJC) codes

Chemistry(all)
Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

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title = "Microstructure evolution and hardening mechanisms of Ni-P electrodeposits",

abstract = "Ni-P alloy coatings with different phosphorus contents were prepared by electroplating in a nickel sulfate bath containing phosphorous acid (H3PO3). Hardening mechanism, such as dispersion hardening of Ni nano crystals in amorphous matrix of the as-deposited Ni-P coating and coarsening weakening of Ni3P for the high P coating after 1h of heat treatment at 400°C were concluded from the experimental data. Hardening mechanism of Ni-P alloys were further discussed based on the microstructure evolution with increasing deposit P content and during the heat treatment by using high resolution TEM (HR-TEM). A maximum hardness was observed for the as-deposited and heat-treated Ni-P alloys with 4wt% and 6wt% P, respectively. These composition ranges corresponding to the microstructure with high hardness proposed are believed to be useful for the industrial applications and further study.",

author = "Huang, {Hsien Chung} and Chung, {Sung Ting} and Pan, {Szu Jung} and Tsai, {Wen Ta} and Lin, {Chao Sung}",

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AU - Huang, Hsien Chung

AU - Chung, Sung Ting

AU - Pan, Szu Jung

AU - Tsai, Wen Ta

AU - Lin, Chao Sung

PY - 2010/12/25

Y1 - 2010/12/25

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