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Publisher DOI: 10.1007/s11837-022-05283-3
Title: Nanoindentation of supercrystalline nanocomposites: linear relationship between elastic modulus and hardness
Language: English
Authors: Yan, Cong 
Bor, Büsra 
Plunkett, Alexander 
Domènech Garcia, Berta 
Schneider, Gerold A. 
Giuntini, Diletta 
Issue Date: 15-Apr-2022
Publisher: Springer Science + Business Media
Source: JOM 74 (6): 2261-2276 (2022)
Abstract (english): 
Supercrystalline nanocomposites (SCNCs) are a new category of nanostructured materials, with organically functionalized nanoparticles assembled into periodic structures, reminiscent of atomic crystals. Thanks to this nanoarchitecture, SCNCs show great promise for functional applications, and understanding and controlling their mechanical properties becomes key. Nanoindentation is a powerful tool to assess the mechanical behavior of virtually any material, and it is particularly suitable for studies on nanostructured materials. While investigating SCNCs in nanoindentation, a linear proportionality has emerged between elastic modulus and hardness. This is not uncommon in nanoindentation studies, and here we compare and contrast the behavior of SCNCs with that of other material categories that share some of the key features of SCNCs: mineral-rich biocomposites (where mineral building blocks are packed into a protein-interfaced network), ultrafine grained materials (where the characteristic nano-grain sizes are analogous to those of the SCNC building blocks), and face-centered cubic atomic crystals (which share the typical SCNC periodic structure). A strong analogy emerges with biomaterials, both in terms of the hardness/elastic modulus relationship, and of the correlation between this ratio and the dissipative mechanisms occurring upon material deformation. Insights into the suitability of SCNCs as building blocks of the next-generation hierarchical materials are drawn.
DOI: 10.15480/882.4427
ISSN: 1543-1851
Journal: JOM 
Institute: Keramische Hochleistungswerkstoffe M-9 
Document Type: Article
Project: Mechanisches Verhalten von superkristallinen keramisch-organischen Nanokompositmaterialien 
More Funding information: The authors acknowledge support from the Deutsche Forschungs-gemeinschaft (DFG, German Research Foundation), project numbers 192346071-SFB 986.
License: CC BY 4.0 (Attribution) CC BY 4.0 (Attribution)
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