scholarly journals Determination of Basic Structure-Property Relations for Processing and Modeling in Advanced Nuclear Fuel: Microstructure Evolution and Mechanical Properties

2009 ◽  
Author(s):  
Kirk Wheeler ◽  
Manuel Parra ◽  
Pedro Peralta
Keyword(s):  
Mechanical Properties ◽  
Nuclear Fuel ◽  
Microstructure Evolution ◽  
Basic Structure ◽  
Structure Property ◽  
Property Relations

FRP-Nanoclay Hybrid Composites: A Review

2017 ◽  
Vol 904 ◽  
pp. 146-150 ◽  
Author(s):  
Manjunath Shettar ◽  
U. Achutha Kini ◽  
Sathya Shankar Sharma ◽  
Pavan Hiremath
Keyword(s):  
Mechanical Properties ◽  
Hybrid Composite ◽  
Hybrid Composites ◽  
Basic Structure ◽  
Structure Property ◽  
Key Factors ◽  
Characterization Techniques

The review is on aimed an insight source for FRP-Nanoclay hybrid composite (nanocomposite) research, which includes basic structure/property, preparation & characterization techniques, mechanical properties and applications of hybrid composites. Key factors are discussed, which are influencing the mechanical properties of nanocomposite with nanoclay addition. Conclusions are also drawn based on the research of nanocomposites and improvement in mechanical properties.

Additive manufacturing of ceramics: Present status and future perspectives

2021 ◽  
Author(s):  
Mainak Saha ◽  
Manab Mallik
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
Microstructure Evolution ◽  
Review Article ◽  
Low Density ◽  
Structure Property ◽  
Future Perspectives ◽  
Structural Applications ◽  
Systematic Structure ◽  
State Of Research

At present, fabrication of ceramics using AM-based techniques mainly suffers from two primary limitations, viz: (i) low density and (ii) poor mechanical properties of the finished components. It is worth mentioning that the present state of research in the avenue of AM-based ceramics is focussed mainly on fabricating ceramic and cermet components with enhanced densities and improved mechanical properties. However, to the best of the authors’ knowledge, not much is known about the microstructure evolution and its correlation with the mechanical properties of the finished parts. Addressing the aforementioned avenue is highly essential for understanding the utilisation of these components for structural applications. To this end, the present review article is aimed to address the future perspectives in this avenue has been provided with a special emphasis on the need to establish a systematic structure-property correlation in these materials.

Tailoring structure formation and mechanical properties of particle brush solids via homopolymer addition

2016 ◽  
Vol 186 ◽  
pp. 17-30 ◽  
Author(s):  
Michael Schmitt ◽  
Chin Ming Hui ◽  
Zachary Urbach ◽  
Jiajun Yan ◽  
Krzysztof Matyjaszewski ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Colloidal Crystal ◽  
Degree Of Polymerization ◽  
Structure Property ◽  
Precise Control ◽  
Property Relations ◽  
Linear Chains ◽  
Sensitive Dependence ◽  
Tethered Chains

Recent progress in the area of surface-initiated controlled radical polymerization (SI-CRP) has enabled the synthesis of polymer-grafted colloids with precise control over the architecture of grafted chains. The resulting ‘particle brush materials’ are of interest both from a fundamental as well as applied perspective because structural frustrations (associated with the tethering of chains to a curved surface) imply a sensitive dependence of the interactions between brush particles on the architecture of surface-tethered chains that offers new opportunities to design hybrid materials with novel functionalities. An important prerequisite for establishing structure–property relations in particle brush materials is to understand the role of homopolymer impurities that form, for example, by thermal self-initiation. This contribution presents a detailed discussion of the role of homopolymer additives on the structure and mechanical properties of particle brush materials. The results suggest that the dissolution of homopolymer fillers follows a two-step mechanism comprised of the initial segregation of homopolymer to the interstitial regions within the array and the subsequent swelling of the particle brush (depending on the respective degree of polymerization of brush and linear chains). Addition of even small amounts of homopolymer is found to significantly increase the fracture toughness of particle brush assembly structures. The increased resistance to failure could enable the synthesis of robust colloidal crystal type materials that can be processed into complex shapes using ‘classical’ polymer forming techniques such as molding or extrusion.

Synthesis, microstructure, and mechanical properties of polycrystalline Cu nano-foam

MRS Advances ◽  
2018 ◽  
Vol 3 (8-9) ◽  
pp. 469-475 ◽  
Author(s):  
Chang-Eun Kim ◽  
Raheleh M. Rahimi ◽  
Nia Hightower ◽  
Ioannis Mastorakos ◽  
David F. Bahr
Keyword(s):  
Mechanical Properties ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Copper Acetate ◽  
Precursor Solution ◽  
Woven Fabric ◽  
Structure Property ◽  
Property Relations ◽  
Multi Scale ◽  
Cu Foam

AbstractA polycrystalline Cu foam with sub-micron ligament sizes was formed by creating a non-woven fabric via electrospinning with a homogeneous mixture of polyvinyl alcohol(PVA)-and copper acetate(Cu(Ac)2). Thermogravimetric measurement of the electrospun fabric of the precursor solution is reported. Oxidizing the precursor fabric at 773K formed an oxide nano-foam; subsequent heating at 573K with a reducing gas transformed the CuO nano-foam to Cu with a similar ligament and meso-scale pore size morphology. A cross-section prepared by focused ion beam lift-out shows the polycrystalline structure with multi-scale porosity. The mechanical property of the Cu nano-foam is measured by nano-indentation. The load-depth curves and deduced mechanical properties suggest that additional intra-ligament pores lead to unique structure-property relations in this non-conventional form of metal.

scholarly journals Azobenzene Functionalized “T-Type” Poly(Amide Imide)s vs. Guest-Host Systems—A Comparative Study of Structure-Property Relations

Materials ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 1912
Author(s):  
Karolina Bujak ◽  
Anna Kozanecka-Szmigiel ◽  
Ewa Schab-Balcerzak ◽  
Jolanta Konieczkowska
Keyword(s):  
Hydrogen Bonds ◽  
Main Chain ◽  
Synthesis And Characterization ◽  
Structure Property ◽  
Intermolecular Hydrogen Bonds ◽  
Optical Birefringence ◽  
Property Relations ◽  
Methyl Phenyl

This paper describes the synthesis and characterization of new “T-type” azo poly(amide imide)s as well as guest-host systems based on the “T-type” matrices. The matrices possessed pyridine rings in a main-chain and azobenzene moieties located either between the amide or imide groups. The non-covalent polymers contained the molecularly dispersed 4-phenylazophenol or 4-[(4-methyl phenyl)diazinyl]phenol chromophores that are capable of forming intermolecular hydrogen bonds with the pyridine rings. The FTIR spectroscopy and the measurements of the thermal, optical and photoinduced optical birefringence were employed for the determination of the influence of H-bonds and the specific elements of polymer architecture on physicochemical properties. Moreover, the obtained results were compared to those described in our previous works to formulate structure-property relations that may be considered general for the class of “T-type” azo poly(amide imide)s.

Assessing Structure-Property Relations of Diseased Tissues Using Nanoindentation and FTIR

2001 ◽  
Vol 711 ◽  
Author(s):  
Donna M. Ebenstein ◽  
Joan M. Chapman ◽  
Cheng Li ◽  
David Saloner ◽  
Joseph Rapp ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Calcium Content ◽  
Spectroscopic Techniques ◽  
Tissue Composition ◽  
Structure Property ◽  
Artery Wall ◽  
Tissue Samples ◽  
Tissue Microstructure ◽  
Property Relations ◽  
Fibrous Tissues

ABSTRACTDisease processes are often associated with changes in tissue composition. For example, in atherosclerosis lipid and calcification are often found in the artery wall, whereas in healthy arteries the tissue microstructure is dominated by highly organized collagen. Such variations in composition likely result in changes in the material properties of the tissue. However, this relationship has not been fully investigated in atherosclerotic vessels. Using a combination of nanoindentation and spectroscopic techniques, our goal was to assess how changes in tissue composition affect the tissue's mechanical properties. Fourier Transform Infrared Spectroscopy (FTIR) was used to assess the biochemical composition of the tissue samples, such as the lipid and calcium content of fibrous tissues in diseased arteries. Nanoindentation was used to measure the local mechanical properties of the same tissue samples. This information was then correlated by position in the sample to assess the contributions of different constituents to the overall structure-property relations of these tissues.

scholarly journals Multi-Scale Structure–Mechanical Property Relations of Graphene-Based Layer Materials

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4757
Author(s):  
Jingran Liu ◽  
Huasong Qin ◽  
Yilun Liu
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Functional Materials ◽  
Scale Structure ◽  
Monolayer Graphene ◽  
Pristine Graphene ◽  
Multilayer Graphene ◽  
Structure Property ◽  
Property Relations ◽  
Multi Scale

Pristine graphene is one of the strongest materials known in the world, and may play important roles in structural and functional materials. In order to utilize the extraordinary mechanical properties in practical engineering structures, graphene should be assembled into macroscopic structures such as graphene-based papers, fibers, foams, etc. However, the mechanical properties of graphene-based materials such as Young’s modulus and strength are 1–2 orders lower than those of pristine monolayer graphene. Many efforts have been made to unveil the multi-scale structure–property relations of graphene-based materials with hierarchical structures spanning the nanoscale to macroscale, and significant achievements have been obtained to improve the mechanical performance of graphene-based materials through composition and structure optimization across multi-scale. This review aims at summarizing the currently theoretical, simulation, and experimental efforts devoted to the multi-scale structure–property relation of graphene-based layer materials including defective monolayer graphene, nacre-like and laminar nanostructures of multilayer graphene, graphene-based papers, fibers, aerogels, and graphene/polymer composites. The mechanisms of mechanical property degradation across the multi-scale are discussed, based on which some multi-scale optimization strategies are presented to further improve the mechanical properties of graphene-based layer materials. We expect that this review can provide useful insights into the continuous improvement of mechanical properties of graphene-based layer materials.

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