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Advanced Multifunctional and Multiscale Materials
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Advanced Multifunctional and Multiscale Materials

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Smart Materials".

Deadline for manuscript submissions: closed (20 August 2022) | Viewed by 2973

Special Issue Editors

Dr. Giulia Lanzara

E-Mail Website
Guest Editor
Department of Engineering, University of Roma Tre, 00146 Rome, Italy
Interests: multifunctional materials; morphing materials; nanocomposites; nano-materials; self-adaptable materials; nano/micro sensors; electrospinning; active materials; self-healing
Dr. Nathan Salowitz

E-Mail Website
Guest Editor
Department of Mechanical Engineering, University of Wisconsin, Madison, WI, USA
Interests: piezoelectrics; SMA; self-healing materials; ultrasonics; sensor integration
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Technological advances increasingly require ligthweight materials with multiple funcitonalities that make them respond or adapt to specific internal or external stimuli. Such functionalities either derive from intrinsic properties of the materials themselves or can be delivered through a multiscale and multi-physics material design approach. The latter can be achieved through the manipulation of a material properties, for example, by embedding nanomaterials or by conceiving the material as a self-responding multi-scale system. The scope of this Special issue is to collect high-quality manuscripts that present advances in this emerging field, including novel individual nano-scale elements of a complex material system. Full papers, communications, as well as reviews will be considered for publication.

Dr. Giulia Lanzara
Dr. Nathan Salowitz
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • multifunctional materials
  • sensors
  • actuators
  • nanomaterials
  • morphing materials
  • self-sensing
  • self-actuating
  • self-healing
  • nanocomposites

Published Papers (2 papers)

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Research

11 pages, 4781 KiB  
Article
Investigation into the Performance of NiTi Shape Memory Alloy Wire Reinforced Sn-Bi Self-Healing Metal Matrix Composite
by Nathan Salowitz, Shobhit Misra, Muhammad Istiaque Haider, Marco Povolo and Pradeep Rohatgi
Materials 2022, 15(9), 2970; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15092970 - 19 Apr 2022
Cited by 5 | Viewed by 1481
Abstract
Self-healing materials have the potential to create a paradigm shift in the life cycle design of engineered structures, by changing the relation between material damage and structural failure, affecting structures’ lifetime, safety, and reliability. However, the knowledge of self-healing capabilities in metallic materials [...] Read more.
Self-healing materials have the potential to create a paradigm shift in the life cycle design of engineered structures, by changing the relation between material damage and structural failure, affecting structures’ lifetime, safety, and reliability. However, the knowledge of self-healing capabilities in metallic materials is still in its infancy compared to other material systems because of challenges in the synthesis of organized and complex structures. This paper presents a study of a metal matrix composite system that was synthesized with an off-eutectic Tin (Sn)-Bismuth (Bi) alloy matrix, reinforced with Nickel–Titanium (NiTi) shape memory alloy (SMA) wires. The ability to close cracks, recover bulk geometry, and regenerate strength upon the application of heat was investigated. NiTi wires were etched and coated in flux before being incorporated into the matrix to prevent disbonding with the matrix. Samples were subjected to large deformations in a three-point bending setup. Subsequent thermo-mechanical testing of the composites confirmed the materials’ ability to restore their geometry and recover strength, without using any consumable components. Self-healing was accomplished through a combination of activation of the shape memory effect in the NiTi to recover the samples’ original macroscopic geometry, closing cracks, and melting of the eutectic material in the matrix alloy, which resealed the cracks. Subsequent testing indicated a 92% strength recovery. Full article
(This article belongs to the Special Issue Advanced Multifunctional and Multiscale Materials)
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15 pages, 18836 KiB  
Article
Application of Smart Materials in the Actuation System of a Gas Injector
by Grzegorz Mieczkowski, Dariusz Szpica, Andrzej Borawski, Saulius Diliunas, Tilmute Pilkaite and Vitalis Leisis
Materials 2021, 14(22), 6984; https://0-doi-org.brum.beds.ac.uk/10.3390/ma14226984 - 18 Nov 2021
Cited by 12 | Viewed by 1462
Abstract
This paper presents the results of research related to the selection of materials for passive and active components of a three-layer piezoelectric cantilever converter. The transducer is intended for use in a low-pressure gas-phase injector executive system. To ensure the functionality of the [...] Read more.
This paper presents the results of research related to the selection of materials for passive and active components of a three-layer piezoelectric cantilever converter. The transducer is intended for use in a low-pressure gas-phase injector executive system. To ensure the functionality of the injector, its flow characteristics and the effective range of valve opening had to be determined. Therefore, a spatial model of the complete injector was developed, and the necessary flow analyses were performed using computational fluid dynamics (CFD) in Ansys Fluent environment. The opening and closing of the injector valve are controlled by a piezoelectric transducer. Thus, its static electromechanical characteristics were found in analytical form. On this basis, the energy demand of the converter, required to obtain the desired valve opening, was determined. Assuming a constant transducer geometry, 40 variants of material combinations were considered. In the performed analyses, it was assumed that the passive elements of the actuator are made of typical materials used in micro-electromechanical systems (MEMSs) (copper, nickel, silicon alloys and aluminum alloys). As for the active components of the converter, it was assumed that they could be made of polymeric or ceramic piezoelectric materials. On the basis of the performed tests, it was found that the energy demand is most influenced by the relative stiffness of the transducer materials (Young’s modulus ratio) and the piezoelectric constant of the active component (d31). Moreover, it was found that among the tested material combinations, the transducer made of silicon oxide and PTZ5H (soft piezoelectric ceramics) had the lowest energy consumption. Full article
(This article belongs to the Special Issue Advanced Multifunctional and Multiscale Materials)
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