Microstructure and mechanical properties of co-sputtered Al-SiC composites

Somya Singh; Shery Chang; C. Shashank Kaira; J. Kevin Baldwin; Nathan Mara; Nikhilesh Chawla

doi:10.1016/j.matdes.2019.107670

Microstructure and mechanical properties of co-sputtered Al-SiC composites

Somya Singh, Shery Chang, C. Shashank Kaira, J. Kevin Baldwin, Nathan Mara, Nikhilesh Chawla

Chemical Engineering and Materials Science

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

Nanolaminates have gained much attention due to exceptional mechanical, optical, electrical and biological properties. In this work, we explore the microstructure and mechanical properties of Al-SiC co-sputtered monolayers having different compositions. Co-sputtering enables tailoring the microstructure at an atomic level and hence is a promising route to develop new generation of materials. These co-sputtered samples were characterized through FIB/SEM, TEM and XPS. They had an amorphous microstructure, with the exception of nanocrystalline Al aggregates present in one of the compositions. The micromechanical properties were studied through nanoindentation. We observed that the modulus and hardness of the co-sputtered samples were much higher than traditional Al/SiC nanolaminate samples having the same composition.

Original language	English (US)
Article number	107670
Journal	Materials and Design
Volume	168
DOIs	https://doi.org/10.1016/j.matdes.2019.107670
State	Published - Apr 15 2019

Bibliographical note

Funding Information:
This work was supported by the U.S. National Science Foundation , DMR-Ceramics Program under grant number DMR-1647568 . The nanolaminate deposition work at LANL was supported by the Center for Integrated Nanotechnologies, an Office of Science User Facility operated for the U.S. Department of Energy (DOE) Office of Science by Los Alamos National Laboratory (Contract DE-AC52-06NA25396 ). We also acknowledge use of the facilities in the Center for 4D Materials Science at ASU.

Publisher Copyright:
© 2019 The Authors

Keywords

Co-sputtered
Nanoindentation
Nanolaminates
Nanolayer
Thin film
Transmission electron microscopy

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abstract = "Nanolaminates have gained much attention due to exceptional mechanical, optical, electrical and biological properties. In this work, we explore the microstructure and mechanical properties of Al-SiC co-sputtered monolayers having different compositions. Co-sputtering enables tailoring the microstructure at an atomic level and hence is a promising route to develop new generation of materials. These co-sputtered samples were characterized through FIB/SEM, TEM and XPS. They had an amorphous microstructure, with the exception of nanocrystalline Al aggregates present in one of the compositions. The micromechanical properties were studied through nanoindentation. We observed that the modulus and hardness of the co-sputtered samples were much higher than traditional Al/SiC nanolaminate samples having the same composition.",

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AU - Mara, Nathan

AU - Chawla, Nikhilesh

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N2 - Nanolaminates have gained much attention due to exceptional mechanical, optical, electrical and biological properties. In this work, we explore the microstructure and mechanical properties of Al-SiC co-sputtered monolayers having different compositions. Co-sputtering enables tailoring the microstructure at an atomic level and hence is a promising route to develop new generation of materials. These co-sputtered samples were characterized through FIB/SEM, TEM and XPS. They had an amorphous microstructure, with the exception of nanocrystalline Al aggregates present in one of the compositions. The micromechanical properties were studied through nanoindentation. We observed that the modulus and hardness of the co-sputtered samples were much higher than traditional Al/SiC nanolaminate samples having the same composition.

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KW - Transmission electron microscopy

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Microstructure and mechanical properties of co-sputtered Al-SiC composites

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