Giacomo Lorenzin¹, Fedor Klimashin², Jeyun Jeom¹, Yang Hu³, Johann Michler², Jolanta Janczak-Rusch¹, Vladyslav Turlo^3,4*, Claudia Cancellieri^1*

1 Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Joining Technologies and Corrosion

2 Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Mechanics of Materials and Nanostructures

3 Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Advanced Materials Processing

4 National Centre for Computational Design and Discovery of Novel Materials MARVEL, Empa, Thun, Switzerland

* Corresponding authors emails: vladyslav.turlo@empa.ch, Claudia.Cancellieri@empa.ch

DOI10.24435/materialscloud:nn-03 [version v1]

Publication date: Jun 07, 2024

How to cite this record

Giacomo Lorenzin, Fedor Klimashin, Jeyun Jeom, Yang Hu, Johann Michler, Jolanta Janczak-Rusch, Vladyslav Turlo, Claudia Cancellieri, Effect of residual stress and microstructure on mechanical properties of sputter-grown Cu/W nanomultilayers, Materials Cloud Archive 2024.85 (2024), https://doi.org/10.24435/materialscloud:nn-03

Description

The combination of the high wear resistance and mechanical strength of W with the high thermal conductivity of Cu makes the Cu/W system an attractive candidate material for heat sink plasma and radiation tolerance applications. However, the resulting mechanical properties of multilayers and coatings strongly depend on the microstructure of the layers. In this work, the mechanical properties of Cu/W nanomultilayers with different densities of internal interfaces are systematically investigated for two opposite in-plane stress states and critically discussed in comparison with literature. Atomistic simulations with the state-of-the-art neural network potential are used to explain the experimental findings. The results suggest that the microstructure, specifically the excess free volume associated with porosity and interface disorder interconnected with the stress state, has a great impact on the mechanical properties, notably Young's modulus of Cu/W nanomultilayers.

Materials Cloud sections using this data

Files

File name	Size	Description
Experimental_data.zip MD5md5:78f31e1126a62161382418ebc798fd4b	969.5 KiB	Experimental data (Readme file is inside)
Modeling_data.zip MD5md5:4887a61eb68aeb9905b6a9c16aa551a7	52.9 MiB	Modeling data (Readme file is inside)

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External references

Keywords

nanomultilayers nanoindentation atomistic simulations Cu/W hardness Young's modulus MARVEL/DD1