Evidence for superconductivity above 260 K at megabar pressures (2018)

Re:Evidence for superconductivity above 260 K at megabar pre... by bArray on Monday September 02, 2019 @02:32PM (#20860975)

This is far outside my wheel house, but... Surely it's the pressure differential that dictates the burst pressure? So if you had multiple sleeves, each decreasing in pressure as you get closer to the outside, this could be possible?

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Re:Evidence for superconductivity above 260 K at megabar pre... by saagarjha on Monday September 02, 2019 @03:35PM (#20861323)

I'd expect that for a pipe under high pressure but small pressure differential compressive strength would matter much more than tensile strength.

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Re:Evidence for superconductivity above 260 K at megabar pre... by semi-extrinsic on Monday September 02, 2019 @05:38PM (#20861943)

Yes, it's the pressure differential that matters, but I don't think it helps in practice. Each pipe needs to have a ratio of inner to outer diameter of at least 100. If the innermost radius is 1 mm, at three layers the outside radius of the biggest pipe is 1 kilometer.

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