Powder metallurgy was practiced long before ancient artisans learned to melt and cast iron. Egyptians made iron tools using PM techniques back in 3,000 B.C. The ancient Incans made jewelry and artifacts using precious metal powders. The first...
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A nanoscale defect opens the floodgates to corrosion.
The amount of heat these new aerogels trap could make them useful for powering factories and heating buildings.
These vessels also withstand inflating and deflating as blood is pumped through them.