|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Late News Poster Session
||NOW ON-DEMAND ONLY - H-28: Carbon Nanotubes Reinforced WC-Co Hard Alloys
||Guolong Tan, Chenglong Li, Xijun Wu
|On-Site Speaker (Planned)
A novel approach for the synthesis of carbon nanotubes strengthened nanostructured WC-Co hard alloys will be presented. Nanometer sized tungsten and cobalt powders were fabricated by reduction process and then carburized by C2H2 instead of CO, while a small fraction of decomposed carbons were in situ converted into carbon nanotubes. The composite WC-Co powders were subsequently hot pressed into bulk alloys, which show exceptionally high Vickers microhardness up to 3307 kg/mm2. The carbon nanotubes with exceptionally high Young's Modules plays a key role on improving the mechanical properties of WC-Co matrix alloys through dispersion strengthening effect. Recently, this technique has been scaled up in a startup company termed as Nostan Company, the Vickers microhardness of these pilot produced alloys reaches 3508 kg/mm2,the highest hardness value in the world. The flexural strength is higher than 2200MPa. The products could now be made in much larger size up to (dia)50×5mm.
||Additive Manufacturing, Composites, Nanotechnology