3D printing is revolutionizing many areas of manufacturing and science. In particular， 3- medical implants， for 3-D printing with metals，-controlled melting or sintering of a metal alloy powder by a laser or electron beam. The mechanical properties of parts produced by this method have been well studied， on their electrical properties.英语小短文
Now in a paper appearing this week on the cover of the journal Applied Physics Letters， from AIP Publishing， researchers report creating a resonant microwave cavity that they 3-D printed via an aluminum-silicon alloy . It exhibits superconductivity when cooled below the critical temperature of aluminum .
"Conductivity is a measure of how easily an electrical current flows through a material， while 39;superconductivity39; is this measure taken to its extreme，" explained Professor Michael Tobar， node director of the Center for Engineered Quantum Systems. "It39;s an effect observed within a number of materials， vanishing of any resistance to the flow of electrical current when cooled below a certain temperature."
areas of physics --， often involving nonstandard geometries and arrays of resonators， which makes conventional machining more challenging.
So two groups at the --， an expert in materials and 3-D printing， and the other led by Tobar， an expert in engineered quantum systems and novel cavity designs -- their expertise and launched a pilot study to explore the superconducting properties of 3-D printed parts.
"The physics of superconductivity is well understood， and it has been known for decades that aluminum exhibits superconductivity，" Tobar said. "But the 3-D printing process relies on aluminum that39;s far from pure and it undergoes several processes -- atomization， laser melting， furnace annealing， etc. be 3-D printed and retain their desirable electrical property."