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Structure, Function and Mechanics of Low-Dimensional Materials and Their Assemblies (Volume II)

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

Deadline for manuscript submissions: 20 September 2024 | Viewed by 873

Special Issue Editors


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Guest Editor
Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
Interests: carbon materials; nanostructured materials; energy storage materials and mechanical metamaterials
Special Issues, Collections and Topics in MDPI journals
School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
Interests: energy storage materials; advanced ceramic materials; printed electronics
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Department of Mechanical Engineering, the City University of Hong Kong, Hong Kong 999077, China
Interests: micro/nanomechanics; in situ electron microscopy; elastic strain engineering; wide-bandgap semiconductor; bio-inspired materials design; nanomanufacturing
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In recent years, low-dimensional materials have become a class of emerging materials. Their sample sizes in one or more spatial dimensions are reduced to the nanoscale regime, leading to the unique size effects or confinement effects. Low-dimensional materials include zero-dimensional (0D) (such as quantum dot, nanoparticle, fullerene), one-dimensional (1D) (such as nanotube, nanowire, nanopillar) and two-dimensional (2D) materials (such as graphene, BN and black phosphorus monolayers). Due to their unique size effects, low-dimensional materials have exhibited excellent mechanical, thermal, electronic, optical, and chemical properties. As a basic building block, low-dimensional materials can be integrated into three-dimensional (3D) macroscopic assemblies. These 3D macroscopic structures or materials have shown enhanced functions in the fields of energy storage, sensing, catalysis, and environmental protection.

Aiming at highlighting some important concepts and developments of low-dimensional materials and their assemblies, this Special Issue will focus on the microstructures, functions, and mechanical properties/behaviors of various low-dimensional materials and their assemblies.

Because of your expertise in low-dimensional materials and their assemblies, we cordially invite you to contribute a paper to this Special Issue. Full papers, communications, and reviews are all welcome.

Thank you very much in advance for your time and consideration.

Prof. Dr. Xiaoyan Li
Dr. Hui Wu
Prof. Dr. Yang Lu
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

  • low-dimensional materials
  • 3D assemblies of low-dimensional materials
  • microstructures
  • mechanical properties
  • mechanical behaviors
  • functions
  • fabrication and design
  • experimental testing

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Published Papers (1 paper)

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Research

12 pages, 1349 KiB  
Article
Mechanical Properties of Silicon Nitride in Different Morphologies: In Situ Experimental Analysis of Bulk and Whisker Structures
by Bokang Wang, Tanglong Bai, Weide Wang and Hongti Zhang
Materials 2024, 17(18), 4549; https://doi.org/10.3390/ma17184549 - 16 Sep 2024
Viewed by 401
Abstract
Silicon nitride (Si3N4) is widely used in structural ceramics and advanced manufacturing due to its excellent mechanical properties and high-temperature stability. These applications always involve deformation under mechanical loads, necessitating a thorough understanding of their mechanical behavior and performance [...] Read more.
Silicon nitride (Si3N4) is widely used in structural ceramics and advanced manufacturing due to its excellent mechanical properties and high-temperature stability. These applications always involve deformation under mechanical loads, necessitating a thorough understanding of their mechanical behavior and performance under load. However, the mechanical properties of Si3N4, particularly at the micro- and nanoscale, are not well understood. This study systematically investigated the mechanical properties of bulk Si3N4 and Si3N4 whiskers using in situ SEM indentation and uniaxial tensile strategies. First, nanoindentation tests on bulk Si3N4 at different contact depths ranging from 125 to 450 nm showed significant indentation size effect on modulus and hardness, presumably attributed to the strain gradient plasticity theory. Subsequently, in situ uniaxial tensile tests were performed on Si3N4 whiskers synthesized with two different sintering aids, MgSiN2 and Y2O3. The results indicated that whiskers sintered with Y2O3 exhibited higher modulus and strength compared to those sintered with MgSiN2. This work provides a deeper understanding of the mechanical behavior of Si3N4 at the micro- and nanoscale and offers guidance for the design of high-performance Si3N4 ceramic whiskers. Full article
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