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Wear resistance of nickel and nickel phosphorus alloy electrodeposits

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4 Author(s)
Holden, C.A. ; AT&T Bell Lab., Murray Hill, NJ, USA ; Opila, R.L., Jr. ; Law, H.H. ; Crane, G.R.

The wear resistance of gray Ni(Cl bath) and Ni/P deposits was evaluated using a crosswire test method that simulates the wear that develops on plug-in type printed wiring boards. All wear samples were lubricated with 2-wt.% five- or six-ring polyphenylether fluid. Some samples plated with a thin layer of cobalt-hardened gold were also examined. Wear test results showed that (1) gray Ni/P deposits plated from nearly pH ammoniacal bath are more wear-resistant for up to 100 wear cycles than nickel deposits plated from an acid chloride bath; and (2) hard gold flashed Ni/P deposits are more wear-resistant for up to 5000 wear cycles at a 200-g load than hard gold flashed nickel deposits plated from an acid chloride bath. A minimum of 127-nm hard gold provides adequate wear.<>

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Components, Hybrids, and Manufacturing Technology, IEEE Transactions on  (Volume:12 ,  Issue: 1 )