Microscale Thermite Reaction

 (fas.harvard.edu)

32 points | by krunck 1 hour ago

3 comments

  • imzadi 39 minutes ago
    Does the second rusty ball really need to be a rusty ball since it is covered in foil?
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    • xnx 3 minutes ago
      Might improve the odds of reaction to have iron on both sides? Would the reaction also work if both balls were covered in foil?
    • phyzome 3 minutes ago
      Doubles the reaction.
  • mrnotcrazy 23 minutes ago
    Does the ball need to be iron? Can we just take a 3d printed sphere, paint it with glue ,roll it around in a bucket of rust and then smash?
  • krunck 1 hour ago
    Please try this at home. You all have rusty iron ball laying around, right?
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    • fer 1 hour ago
      It wouldn't be weird for someone in the south of France to have a rusty pétanque ball.
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      • ece 1 minute ago
        [delayed]
    • jcims 1 hour ago
      Hammer faces would work (def wear goggles!!!). Hit the face of the disposable one with a mixture of hydrogen peroxide, vinegar and salt and wait an hour.
    • xattt 1 hour ago
      Joining the thread to see where iron balls can be sourced.

      Some vendor on AliExpress? Those Lucky Iron Fish?

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      • mhb 12 minutes ago
        Cast iron pan left outside for a day or two.
      • dgacmu 1 hour ago
        This might work with old iron dumbbells (or modern iron kettle balls if left unpainted). Your gym might hate you for it though.
      • lstodd 1 hour ago
        I'd guess exact form wouldn't matter. Wrap a hammer in foil and beat up something rusty.