|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Refractory Metals 2016
||Manufacturing of Bulk Ultrafine Grain Tungsten from Nanocrystalline Tungsten Powder and Its Potential Application for Nuclear and Fusion Reactors
||Chai Ren, Z. Zak Fang, Huan Zhang, Dean Buchenauer, Robert Kolasinski
|On-Site Speaker (Planned)
A process has been developed for manufacturing ultrafine grain bulk tungsten. The process is based on sintering of nanocrystalline tungsten powder between 1100 – 1300 degree C, significantly lower than typical temperatures for sintering W which is above 1800 or 2000 degree C. The powder could be sintered at such low temperatures is attributed to the nanoscale size and the internal defects in the powder, which produced by a unique ultrahigh energy planetary ball milling process. The manufacturing of bulk ultrafine W also have to overcome the difficulties with respect to shrinkage and cracking due to residual stresses. A preliminary test of the ultrafine grain W in a plasma environment shows promise of such a ultrafine grain microstructure for nuclear and fusion reactor applications.
||Planned: A print-only volume