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  • Glass tubes vs tin whiskers

    From vjp2.at@at.BioStrategist.dot.dot.co@21:1/5 to All on Sat Jul 6 04:29:29 2024
    Unlike lead, tin solder grows dendrites or whiskers which can short
    circuit. Same principle as concrete stalagtites growing beneath concrete overpasses. Some of the problems with battery fires are also caused by
    lithium dendrites. Speculation is that major space and car disasters where caused by tin whiskers. Makes me wonder, at least for very critical
    components (eg space or mil), maybe they should be put in glass vaccuum or argon tubes. Anyone know more?


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  • From John Robertson@21:1/5 to vjp2.at@at.BioStrategist.dot.dot.co on Sat Jul 6 16:10:43 2024
    On 2024/07/05 9:29 p.m., vjp2.at@at.BioStrategist.dot.dot.com wrote:
    Unlike lead, tin solder grows dendrites or whiskers which can short circuit. Same principle as concrete stalagtites growing beneath concrete overpasses. Some of the problems with battery fires are also caused by lithium dendrites. Speculation is that major space and car disasters where caused by tin whiskers. Makes me wonder, at least for very critical components (eg space or mil), maybe they should be put in glass vaccuum or argon tubes. Anyone know more?



    Good question.

    NASA doesn't know (as of 2019) what causes tin whiskers...

    Could some sort of medium keep whiskers from growing?

    https://nepp.nasa.gov/WHISKER/background/index.htm

    John :-#)#
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