DocumentCode :
3176600
Title :
A tribochemical investigation of the reaction products on Pd plated contacts
Author :
Shinchi, A. ; Imada, Y. ; Honda, F. ; Nakajima, K.
Author_Institution :
Yazaki Parts Co. Ltd., Haibara, Japan
fYear :
1995
fDate :
2-4 Oct. 1995
Firstpage :
64
Lastpage :
70
Abstract :
Fretting experiments on Pd-plated pairs were carried out in an organic/air atmosphere including benzene, cyclohexane, and n-hexane, to understand the relationships between the tribological properties, the chemical form of reaction products, and the electric conductivity to form organic reaction products at the contact. During the initial stage of fretting experiments in these atmospheres, the contact resistance was rather low and stable, compared with that in ambient air. Quantitative analysis of C and O on the contact surface by electron probe X-ray microanalyzer showed that a small amount of reaction product existed in and around the contact area, and the atomic composition of C and O of the product was mostly stoichiometric. Analytical results using Fourier transformed infrared absorption spectroscopy showed that the products include carbonyl, hydroxide, and minor amount of the initial organic compounds in dried atmosphere. Experimental results suggested that Pd surface fretted with no electric current across it induced catalytic reactions to oxidize the organic molecules to form carbonyl or carboxyl group in ambient atmosphere. The reaction product which was generated in dried atmosphere with organic vapor effectively maintained the contact resistance at a low and stable value. The wear rate of the contact surface, film thickness of the reaction product, and different effects of oxidation rate in dried and ambient air are discussed.
Keywords :
Fourier transform spectroscopy; contact resistance; electrical contacts; electron probe analysis; electroplating; infrared spectroscopy; oxidation; palladium; wear; Fourier transformed infrared absorption spectroscopy; Pd; contact resistance; contact surface; electric conductivity; electron probe X-ray microanalyzer; fretting experiments; organic/air atmosphere; oxidation rate; plated contacts; reaction product; reaction products; tribochemical investigation; wear rate; Atmosphere; Chemical products; Conductivity; Contact resistance; Electromagnetic wave absorption; Electrons; Infrared spectra; Organic chemicals; Probes; Surface resistance;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electrical Contacts, 1995., Proceedings of the Forty-First IEEE Holm Conference on
Conference_Location :
Montreal, Quebec, Canada
Print_ISBN :
0-7803-2728-4
Type :
conf
DOI :
10.1109/HOLM.1995.482861
Filename :
482861
Link To Document :
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