Ceramics are some of the hardest materials on Earth. They can withstand extreme temperatures, and some are impervious to friction, scratching, and other mechanical stresses that wear out metal and plastic. But it can be difficult to make complex shapes out of the materials.
Chemists at HRL Laboratories in Malibu, California, may have gotten around that problem by developing ceramics that can be made in a 3-D printer. The result: ultrastrong objects that are impossible to make using conventional methods.
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