The Influence of Particulate Contaminants on Vibration-Induced Fretting Degradation in Electrical Connectors

Author(s):  
Jinchun Gao ◽  
Chen Chen ◽  
George T. Flowers ◽  
Robert L. Jackson ◽  
Michael J. Bozack
Author(s):  
D. M. Davies ◽  
R. Kemner ◽  
E. F. Fullam

All serious electron microscopists at one time or another have been concerned with the cleanliness and freedom from artifacts of thin film specimen support substrates. This is particularly important where there are relatively few particles of a sample to be found for study, as in the case of micrometeorite collections. For the deposition of such celestial garbage through the use of balloons, rockets, and aircraft, the thin film substrates must have not only all the attributes necessary for use in the electron microscope, but also be able to withstand rather wide temperature variations at high altitude, vibration and shock inherent in the collection vehicle's operation and occasionally an unscheduled violent landing.Nitrocellulose has been selected as a film forming material that meets these requirements yet lends itself to a relatively simple clean-up procedure to remove particulate contaminants. A 1% nitrocellulose solution is prepared by dissolving “Parlodion” in redistilled amyl acetate from which all moisture has been removed.


Alloy Digest ◽  
1984 ◽  
Vol 33 (4) ◽  

Abstract Copper Alloy No. C40800 is brass with an addition of tin (nominally 2%). It can be machined and formed successfully. It can be joined by several methods and as good resistance to corrosion. A typical use is electrical connectors but it also can be used for bushings, washers and costume jewelry. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-474. Producer or source: Brass mills.


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