|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XIX
||Amorphization of Si in Al-Cu-Si ternary alloy system with liquid quenching process
||Rui Yamada, Junpei T. Okada, Takeshi Wada, Haruka Isano, Tomohiro Yoshikawa, Junji Saida
|On-Site Speaker (Planned)
Nowadays, liquid quenching process is widely used for fabricating amorphous materials. Recently, unprecedented method was proposed in our collaborative research group (IMR, Tohoku University). They intendedly selected the constituent elements with large difference of crystalline growth rates. It is supposed that the element with high growth rate easily crystallizes while for the element with slow growth rate remains in the liquid. During the quenching, the latter is expected to transform into the amorphous solid. By etching the crystalline phases, the amorphous material could obtain solely. In the latest study, they confirmed that the amorphous Si was obtained from the Al(non-facet)-Si(facet) eutectic system. In the present study, we extended it to the ternary alloy system by adding Cu with the aim of improving the whole glass forming ability. The microstructure evolutions in different conditions (alloy compositions, cooling rates) and the mechanism of the amorphization of Si are discussed.
||Process Technology, Solidification, Aluminum