Author Archives: SAM

Materials Colloquium 2020 - October, 7th, 16:30

Zoom (https://ethz.zoom.us/j/96160893909)

Ahmad Rafsanjani (SDU Biorobotics, University of Southern Denmark)

Soft robotics surged a bioinspired evolution in robot design through their highly deformable structure by enabling robots to interact adaptively with complex environments and cooperate safely with humans. Flexible mechanical metamaterials are compliant structures with exotic mechanical properties and complex deformation behavior associated with their unique architecture rather than their chemical makeup. Integrating the complex behavior of highly deformable metamaterials into the function of soft robots allows us to embody intelligent behavior into their structure and substantially enhance their performance. In this talk, I will present several examples in which flexible metamaterials can enable us to assign primitive forms of intelligent behavior to the body of soft robots and perform simple tasks.

Overview Materials Colloquium 2020

Materials Colloquium 2020 - October, 7th, 16:30

Zoom (https://ethz.zoom.us/j/96160893909)

Brendan Bulfin (Professorship of Renewable Energy Carriers, D-MAVT, ETH Zürich)

Metal oxide redox cycles offer a pathway for converting heat into chemical energy via the thermal reduction of a metal oxide. The reduced metal oxide can then be used in a number of applications by re-oxidized it in a second step, utilizing the stored chemical energy and returning the oxide to its original state. Applications include; thermochemical fuel production via water or carbon dioxide splitting, thermal energy storage, and oxygen storage and separation. Here we discuss these applications, with a focus on the redox materials and their requirements. The crucial limiting factors for these applications are the thermodynamics of the reactions, which depend strongly on the choice of oxide. These limitations will be discussed along with developments in the field. Finally, a large material screening study of perovskite oxides will be presented.

Overview Materials Colloquium 2020

Dear members of SAM,

We are happy to invite you to the SAM General Assembly this year via ZOOM (see link below) to vote a new board, discuss association matters and bring in ideas for the coming year.

The SAM member joining with the most creative ZOOM background will receive a small prize. 

Join us, tell us what you liked so far and what you wish for in the future. Simply send us an email and we will address your ideas during the event.

Also, if you are interested in getting more involved in the “behind the scenes” of the Department of Materials, our GA is a good time to get to meet the SAM board and join it to become an active member of SAM.

Date: 23 September 2020
Time: 10 AM
Place: ZOOM (https://ethz.zoom.us/j/91297904514) - Password: 443411

The agenda:
1. Welcome
2. Election of the vote counter
3. Approval of the minutes of the GA 2019
4. Report from the board
A. Presentation of the association and the board
B. Highlights of the past year
C. Outlook
5. Finances 2019/2020 (expenses/budget)
6. Election of one to two financial revisers
7. Discharge of the board
8. Election of the board members and their functions
9. Varia

We are looking forward to seeing you there!

Your SAM-team
Cameron, Chia, Laura, Linda, Maria-Nefeli, Martina, Murielle, Nicolas, Štefan, Tobias, Viktor, Vladimir

Materials Colloquium 2020 - September, 9th, 16:30

Zoom (https://ethz.zoom.us/j/94133233762)

Roland Logé (Laboratory of Thermomechanical Metallurgy, Institute of Materials, EPFL)

Laser Powder Bed Fusion (LPBF, also known as SLM, Selective Laser Melting) is a well known Additive Manufacturing technology, among the most studied in literature for metals and alloys. A number of drawbacks however still limit its range of applications, among which : (i) the high level of residual stresses; (ii) the often narrow safe processing window, which does not leave much space for microstructure optimization; (iii) the time consuming search for optimum laser parameters, which is material and machine dependent, and also relates to the part size and shape. To solve some of these issues, we introduce a new hybrid “3D LSP” manufacturing process, combining Laser Shock Peening (LSP) with LPBF. 3D LSP can efficiently strain harden a metal and convert LPBF induced Tensile Residual Stresses into CRS. It opens a range of new possibilities such as increased fatigue life or geometrical accuracy, 3D design of grain structures, and improved processability. We also present a new “translation rule”, which is able to predict optimum LPBF parameters for one material, based on those found for another material, using the concept of normalized enthalpy.

Overview Materials Colloquium 2020

Materials Colloquium 2020 - September, 9th, 16:30

Zoom (https://ethz.zoom.us/j/94133233762)

Chiara Gattinoni (Materials Theory, D-MATL, ETH Zürich)

A precise understanding of the surface and interface behavior of ferroelectric materials is necessary towards their use in promising applications such as memory storage or catalysis. In this seminar I will focus on the example of lead titanate and bismuth ferrite to describe how structural and electronic properties affect ferroelectricity at the nanoscale. I will show that surfaces and interfaces play a pivotal role in (de)stabilizing the ferroelectric polarization in thin films and nanoparticles. I will then investigate how the special properties of ferroelectric surfaces can be used to create efficient catalytic devices.

Overview Materials Colloquium 2020  

Special Edition of the Materials Colloquium 2020

July, 23rd, 15:00

Zoom: https://ethz.zoom.us/j/91334700984

Elsa Olivetti (MIT, Department of Materials Science and Engineering)

Materials have long played a role in transitioning between eras. Now the materials community’s most pressing task is to decarbonize society. For the past several decades, materials science has played a key role in lowering carbon dioxide emissions from the electricity sector through development of renewable energy generation and high performing energy storage technologies. However, outside of the energy sector there remain significant greenhouse gas emissions linked to materials production, particularly in the form of infrastructure and chemicals production. This presentation focuses on the significant challenge of reducing the burden of materials production itself. I will review recent progress in understanding the potential for decarbonization in the materials production sector and describe where and how the material science community can have significant impact.

Overview Materials Colloquium 2020