The CMSM-RCSM joint Special Seminar
(The 265th Special CMSM seminar)

Synthesis of functional materials by laser powder bed fusion and liquid metal dealloying

Prof. Ilya Okulov
Head of Department Processing of Functional Materials,
Leibniz-IWT Bremen, Germany
Date & Time: 14:30 - 15:30, March 21st (Thu), 2024.
Place: 8th floor middle seminar room, 8F, Main Bldg., Sengen site.

Abstract:

 In the past years, laser powder bed fusion (PBF) has rapidly reached the highest technology readiness level. However, additive manufacturing of some classes of materials such as advanced magnetic materials and metallic glasses remains an unresolved challenge. I will present some insights related to the PBF of metallic glasses and NdFeB magnets as well as highlight the current challenges. The next challenge I would like to address is multi-material additive manufacturing. Multi-material additive manufacturing possesses enormous potential to extend the design space beyond complex geometries. In particular, the ability to manufacture parts from multiple materials using additive manufacturing technologies enables optimization of the mechanical properties of the parts or/and to provide additional functions for the final parts. I will report about PBF of a multi-material composed of a metallic glass and titanium alloy. Furthermore, we will talk about dealloying, one of the most fascinating synthesis methods for assembling several quintillions of nanoscale objects into a macroscopic body in a very efficient way. There are four main types of dealloying methods: electrochemical, liquid metal, solid-state, and vapor phase dealloying. We will particularly focus on liquid metal dealloying invented in the lab of Prof. Hidemi Kato at the Tohoku University. Moreover, I will report on the synthesis of hierarchical materials using a combination of PBF and liquid metal dealloying.

(Contact)

Taisuke Sasaki (Ext. 2466), Nanostructure Analysis Group, CMSM. E-mail: SASAKI.Taisuke[at]nims.go.jp
Makoto Watanabe (Ext. 2469), Research Center for Structural Materials (RCSM). E-mail: WATANABE.Makoto[at]nims.go.jp