High-pressure-melt fine powder atomization startup (Boston-area, unnamed)

Another fellow around here had a bright idea once. He wanted to melt various metals under a higher pressure of a gas, drive more of the gas into solution in the molten metal, and then atomize it. He'd atomize it in a vacuum chamber, so all that extra solubility of gas was going to cause the drops to explode. You'd get even finer metal powders. It's hard to get metal powders smaller than about 30 microns — 25 microns is 1/1000 of an inch. He started a company and was actually able to do it, but I'm not sure the economics ever worked out, or that he really found an application for powders that fine.