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3D-Printed Ceramics Could Help Build Hypersonic Planes (livescience.com)
An anonymous reader writes: Researchers have used a 3-D printer to make specialized ceramic parts that have overcome one of the biggest problems with ceramic objects: their tendency to crack. This new method is 100 to 1,000 times faster than previous 3D-ceramic-printing techniques, the researchers said. Furthermore, electron microscopy of the end products detected none of the porosity or surface cracks that normally weaken ceramics; indeed, these silicon carbide materials were 10 times stronger than commercially available ceramic foams of similar density, the scientists noted. "If you go very fast, about 10 times speed of sound within the atmosphere, then any vehicle will heat up tremendously because of air friction," said Tobias Schaedler, senior scientist at HRL Laboratories in Malibu, Calif. "People want to build hypersonic vehicles and you need ceramics for the whole shell of the vehicle."
Let's not hate on Concorde for too much - it served for 27 years, which while certainly not record-setting wasn't a bad run. British Airways was said to have turned a profit on their runs. It was doomed by a collection of factors - the only crash of the plane in 2000 (not the design's fault, it hit debris shed from a DC10 that the airport should have cleaned up), the 2001 terrorist attacks, and a general downturn in aviation and reduced profits. Also when the plane was grounded after the 2000 accident it's said that the airlines realized that they made more money in shunting their concorde passengers into first class of their other flights - it's not like they had another supersonic plane they could just switch to.
Supersonic commercial travel will certainly happen again, and the next plane will be improved over Concorde in every regard. It really just needs a sustained upswing in long-distance commercial air travel, particularly the high end of the market. Maybe emerging markets will be the spark that's needed.
Shiny New Australia.