Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10668640 | Surface and Coatings Technology | 2010 | 7 Pages |
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 1 h 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 4 wt.% and 6 wt.% 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.
Related Topics
Physical Sciences and Engineering
Materials Science
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Authors
Hsien-Chung Huang, Sung-Ting Chung, Szu-Jung Pan, Wen-Ta Tsai, Chao-Sung Lin,