Cryogenically treated cables

Could we possibly get back to the topic and not keep feeding geoffkait? I'm beginning to not want to click on this thread anymore.

You guys realize this thread is 18 years old, right? And since the OP hasn’t posted anything new anywhere since 2001, I’m gonna go out on a limb and say he’s pretty much moved on......probably in more ways than one.

the electrical activity in copper when brought back to room temp will not be any better than with no treatment. ive done cross sections of copper/gold/silver/plat/irridium/plutonium/thorium/ etc in research for conductivity and transmission speed of the electron/hole pairs for semiconductor chip upgrades cause the time a Ghz signal enters a pc board to the time it hits the transistor junction in the processer does make a lag in the output. but that is only signifient in the GHZ freq range. totally silly effect in the khz and down. even high freq MRI magnets with cryo cooled power supplys are for the reason of lower resistance and no infulence in the resultant mri results- so if you think itsounds different its your $$ to waste. ive done it to liquid HE,H.O2, and colder.you may likely suffer more damage due to slip face kinda like embritlement in the lattice no matter how slow warmed up, the inital cold shock will offset the lattice a few minutes/deg. upsetting the outer 3-4 electrons orbit. yea.
otherwise copper is ultra stabil electrically and mechanically. cryo for fe based elements is a totally different reason.


taken from Cu atomic info
What is Metallography?

Metallography is the study of the structure of metals. It includes the techniques used to prepare specimens for examination, examining the specimen and interpreting the structures. Specimen preparation is an important part of metallography. A specimen must be appropriately prepared to ensure correct observation and interpretation of the microstructure. Specimen preparation consists of sample selection, sectioning, grinding, polishing, and etching. Adequate sample selection provides a statistically reliable description of the material quality. The number, location and orientation of the samples examined are important parameters in sample selection. Sectioning, grinding and polishing are used to prepare a flat specimen with a mirror like finish. Care must be taken during sample preparation not to introduce artifacts which lead to invalid microstructure interpretations. Sometimes it is beneficial to examine the specimen in the as polished condition. The as polished condition is useful for examining the microstructures of materials whose constituents exhibit large differences in light reflectivity after polishing. Porosity and inclusions are examples of features that are easily observed in the as polished condition. But most materials are etched to reveal the microstructure. Etching is a controlled corrosion process resulting form electrolytic action between surface areas of different potential. Etching reveals the microstructure of a material by selective dissolution of the structure. Specimens are then examined using optical and electron microscopes. There are also many other techniques used to characterize the structure of metals, but this article will concentrate on microstructural characterization.

Please see the proof below
https://www.copper.org/resources/properties/microstructure/coppers.html

 its high electrical conductivity (59.6×106 S/m) and high thermal conductivity, second highest (second only to silver) among pure metals at room temperature.[10] This is because the resistivity to electron transport in metals at room temperature originates primarily from scattering of electrons on thermal vibrations of the lattice, which are relatively weak in a soft metal

Look, if we want to argue about 18 year old threads we will! ... but thank you for reminding us what idiots we are. I will go and hang my head in shame now .... over and out (of this thread).

thecarpathian702 posts11-06-2019 7:58pmYou guys realize this thread is 18 years old, right? And since the OP hasn’t posted anything new anywhere since 2001, I’m gonna go out on a limb and say he’s pretty much moved on......probably in more ways than one.