DocumentCode :
3463591
Title :
Wear resistance of nickel and nickel phosphorus alloy electrodeposits
Author :
Holden, C.A. ; Opila, R.L. ; Law, H.H. ; Crane, G.R.
Author_Institution :
AT&T Bell Lab., Murray Hill, NJ, USA
fYear :
1988
fDate :
26-29 Sept. 1988
Firstpage :
101
Lastpage :
107
Abstract :
The wear resistance of gray Ni/Cl and Ni/P deposits was evaluated using a crossed-wire test method that stimulates 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 a neutral ammoniacal bath are more wear-resistant for up to 100 wear cycles than nickel deposits plated from an acid chloride bath; (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 5 mu in. hard gold provides this wear protection.<>
Keywords :
electric connectors; environmental testing; materials testing; nickel; nickel alloys; reliability; wear; 5E-6 in; CoAu alloy coating; Ni electrodeposits; NiP alloy electrodeposits; acid chloride bath; crossed-wire test method; neutral ammoniacal bath; plug-in type printed wiring boards; polyphenylether fluid lubrication; wear protection; wear resistance; Cobalt; Cranes; Gold; Life estimation; Microscopy; Microstructure; Nickel alloys; Surface structures; Testing; Wiring;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electrical Contacts, 1988., Proceedings of the Thirty Fourth Meeting of the IEEE Holm Conference on
Conference_Location :
San Francisco, CA, USA
Type :
conf
DOI :
10.1109/HOLM.1988.16105
Filename :
16105
Link To Document :
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