microstructure and corrosion behavior of ni-alloy/crn nanolayered coatings

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ID: 259368
2011
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Abstract
The Ni-alloy/CrN nanolayered coatings, Ni-Al/CrN and Ni-P/CrN, were deposited on (100) silicon wafer and AISI 420 stainless steel substrates by dual-gun sputtering technique. The influences of the layer microstructure on corrosion behavior of the nanolayered thin films were investigated. The bilayer thickness was controlled approximately 10 nm with a total coating thickness of 1𝜇m. The single-layer Ni-alloy and CrN coatings deposited at 350∘C were also evaluated for comparison. Through phase identification, phases of Ni-P and Ni-Al compounds were observed in the single Ni-alloy layers. On the other hand, the nanolayered Ni-P/CrN and Ni-Al/CrN coatings showed an amorphous/nanocrystalline microstructure. The precipitation of Ni-Al and Ni-P intermetallic compounds was suppressed by the nanolayered configuration of Ni-alloy/CrN coatings. Through Tafel analysis, the 𝐸corr and 𝐼corr values ranged from –0.64 to –0.33 V and 1.42×10−5 to 1.14×10−6 A/cm2, respectively, were deduced for various coating assemblies. The corrosion mechanisms and related behaviors of the coatings were compared. The coatings with a nanolayered Ni-alloy/CrN configuration exhibited a superior corrosion resistance to single-layer alloy or nitride coatings.
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huang2011journalmicrostructure Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Hao-Hsiang Huang, Fan-Bean Wu, Jyh-Wei Lee, Li-Chun Chang
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Journal reproductive biology and endocrinology
Year 2011
DOI
10.1155/2011/137498
URL
http://dx.doi.org/10.1155/2011/137498
Keywords
Technology (General)

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