Science. 1970 May 15;168(3933):820-2. doi: 10.1126/science.168.3933.820.
A filamentary crystal growth is associated with impacts of hypervelocity microparticles upon copper foil. They are copper whiskers formed by the condensation of the target material vaporzied by the impact.
丝状晶体生长与超高速微粒子对铜箔的冲击有关。它们是由受冲击蒸发的靶材蒸气冷凝形成的铜须。