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

Abstract

Nanolaminates have gained much attention due to exceptional mechanical, optical, electrical and biological properties. Here, 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. Finally, 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.

Authors:
; ; ; ; ; ORCiD logo
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1547716
Alternate Identifier(s):
OSTI ID: 1570656
Report Number(s):
LA-UR-19-29885
Journal ID: ISSN 0264-1275; S0264127519301078; 107670; PII: S0264127519301078
Grant/Contract Number:  
AC52-06NA25396; 89233218CNA000001
Resource Type:
Published Article
Journal Name:
Materials & Design
Additional Journal Information:
Journal Name: Materials & Design Journal Volume: 168 Journal Issue: C; Journal ID: ISSN 0264-1275
Publisher:
Elsevier
Country of Publication:
United Kingdom
Language:
English
Subject:
36 MATERIALS SCIENCE; Co-sputtered; Nanolaminates; Nanolayer; Transmission electron microscopy; Nanoindentation; Thin film

Citation Formats

Singh, Somya, Chang, Shery, Kaira, C. Shashank, Baldwin, J. Kevin, Mara, Nathan, and Chawla, Nikhilesh. Microstructure and mechanical properties of co-sputtered Al-SiC composites. United Kingdom: N. p., 2019. Web. doi:10.1016/j.matdes.2019.107670.
Singh, Somya, Chang, Shery, Kaira, C. Shashank, Baldwin, J. Kevin, Mara, Nathan, & Chawla, Nikhilesh. Microstructure and mechanical properties of co-sputtered Al-SiC composites. United Kingdom. doi:10.1016/j.matdes.2019.107670.
Singh, Somya, Chang, Shery, Kaira, C. Shashank, Baldwin, J. Kevin, Mara, Nathan, and Chawla, Nikhilesh. Mon . "Microstructure and mechanical properties of co-sputtered Al-SiC composites". United Kingdom. doi:10.1016/j.matdes.2019.107670.
@article{osti_1547716,
title = {Microstructure and mechanical properties of co-sputtered Al-SiC composites},
author = {Singh, Somya and Chang, Shery and Kaira, C. Shashank and Baldwin, J. Kevin and Mara, Nathan and Chawla, Nikhilesh},
abstractNote = {Nanolaminates have gained much attention due to exceptional mechanical, optical, electrical and biological properties. Here, 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. Finally, 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.},
doi = {10.1016/j.matdes.2019.107670},
journal = {Materials & Design},
number = C,
volume = 168,
place = {United Kingdom},
year = {2019},
month = {4}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1016/j.matdes.2019.107670

Citation Metrics:
Cited by: 3 works
Citation information provided by
Web of Science

Figures / Tables:

Fig. 1 Fig. 1: HRTEM image of (a) Sample 1, (b) Sample 2, (c) Sample 3 and (d) Sample 4. The insets contain acquired SAEDs. Random arrangement of atoms confirms the presence of amorphous microstructure.

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