3 ms·

Yeah, why is 1GPa being referred to as "near-room pressure"?

• dontwearitout 4y ago
  After a bit of googling, the yield strength of some common materials is within striking distance of 1GPa (many steels are 0.25 GPa, silicon carbide is 3.4 GPa [1]). So perhaps it could be possible to embed this superconductor in a highly stressed supporting structure to provide the pressure. Not useful for cabling, but this could conceivably be used for room temperature SQUIDs [2], paving the way to cheap MRIs. [1] https://www.engineeringtoolbox.com/young-modulus-d_417.html https://www.engineeringtoolbox.com/young-modulus-d_417.html [2] https://en.wikipedia.org/wiki/SQUID https://en.wikipedia.org/wiki/SQUID
• jetrink 4y ago
  Wolfram Alpha tells me that to bring 10 sq. cm of the material to 1GPa would require 18x the bite force of a T-Rex. I don't consider the inside of a dinosaur's mouth "room pressure" either, but I could imagine a reasonably-sized housing capable of producing that force. Another comparison for scale: It is 1/6th the pressure at which artificial diamonds are manufactured.
  • hinkley 4y ago
    T-Rex bite strength sounds like something Abe Simpson would say. 16% of diamond pressure is a lot.
    • bhaak 4y ago
      But diamond pressure is something that we are already capable of on a regular basis. This would put it into the realm of engineering problems at least for some applications if this claim turns out to be true.
• kadoban 4y ago
  > Yeah, why is 1GPa being referred to as "near-room pressure"? Because it's _very_ close to room pressure compared to other results. For example this team's last result (that's ... very questionable, but ignoring that), needed around 250 GPa.