654877bd_erials_Science_and_Engineering__Significance
[Date] 1909 [Candidate Moment] William D. Coolidge devises ductile tungsten wire, using a powder metallurgical approach, for use as an energy-efficient, high-lumen lighting filament. [Significance] 
Spurs the rapid expansion of electric lamps and initiates the science of modern powder metallurgy.
Greatest Moments in Materials Science and Engineering
Significance