scholarly journals Bio-composite materials: a short review of recent trends, mechanical and chemical properties, and applications

2018 ◽  
Vol 2 (3) ◽  
pp. 83-91 ◽  
Author(s):  
Şafak Yıldızhan ◽  
Ahmet Çalık ◽  
Mustafa Özcanlı ◽  
Hasan Serin
Keyword(s):  
Composite Materials ◽  
Chemical Properties ◽  
Short Review ◽  
Recent Trends ◽  
And Chemical Properties

Study of Whiskers to be Used in Composite Materials

2021 ◽  
Vol 316 ◽  
pp. 51-55
Author(s):  
Tamara I. Shishelova ◽  
Vadim V. Fedchishin ◽  
Mikhail A. Khramovskih
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Chemical Properties ◽  
High Strength ◽  
Rapid Expansion ◽  
Physical And Chemical Properties ◽  
Reinforcement Fiber ◽  
Object Of Study ◽  
Physical And Chemical ◽  
And Chemical Properties

Rapid expansion of technologies poses higher requirements to structural materials and items made of them. Conventional materials are being replaced by composite materials (composites). Different additives enhancing the properties of initial materials are used as reinforcement fibers of composites. Utilization of micro-and nanosize particles for production of present-day materials is paid much attention to. Whiskers are among such materials. These crystals have high strength, high chemical and temperature resistance. But for rational utilization of whickers of different chemical composition in composite materials one should know their physical and chemical properties. Objectives of the paper: to study physical and chemical properties of whiskers in different compounds, their composition and structure; to prove experimentally the feasibility of utilizing whiskers as a reinforcement fiber of composite materials. Object of study: specimens of whiskers of silicon nitride (Si3N4), aluminum oxide (Al2O3), aluminum nitride (AlN), and mullite (Al6Si2O13). Methods of investigation: thermal study of specimens, study of mechanical properties and chemical strength, and IR-spectroscopy. Results of study: specimens of whiskers have been studied and their mechanical properties have been tabulated for comparison. Extensive thermal investigation was followed by deduction of regularities and identification of chemical properties of whiskers. IR-spectra of whiskers have been studied and conclusions on molecular composition and on presence of impurities in some whiskers have been made.

Computer Modeling and Research of FML Composites Using the Method of Features

2015 ◽  
Vol 220-221 ◽  
pp. 837-842
Author(s):  
Michał Majzner ◽  
Andrzej Baier
Keyword(s):  
Composite Materials ◽  
Multicriteria Optimization ◽  
Chemical Properties ◽  
Fiber Composites ◽  
Probability Of Failure ◽  
Design Engineering ◽  
Physical And Chemical Properties ◽  
Construction Process ◽  
Physical And Chemical ◽  
And Chemical Properties

The use of modern materials, such as composite materials, enabling the production of new or modifying the existing design solutions, and improvement of their technical characteristics in their use in the design, engineering and manufacturing process, allows achieving an improvement of their endurance, physical and chemical properties to match the features and functionality that comply with assumptions. In research studies, it has been proposed to systematize and formalize features in the context of modeling and fabrication of objects created on the basis of structural fiber composites. The result of the study and analysis will be precisely adapted algorithm of the design and construction process and also fabrication of the structural objects made upon using composite materials. The process of multicriteria optimization and stress analysis upon using CAx-class software will enable to reduce the probability of failure or damage to the modified component.

Electroluminescence Properties of ZnO Nano-Particles Embedded in Polyimide

2011 ◽  
Vol 694 ◽  
pp. 137-141
Author(s):  
Jia Qi Lin ◽  
Jun Hui Shi ◽  
Jing Leng ◽  
Ming Hui Xia ◽  
Qing Guo Chi
Keyword(s):  
Composite Materials ◽  
Absorption Edge ◽  
Chemical Properties ◽  
Blue Shift ◽  
Uv Absorption ◽  
Nano Particles ◽  
Breakdown Field ◽  
Physical And Chemical Properties ◽  
Physical And Chemical ◽  
And Chemical Properties

In this paper, ZnO Nano-particles is embedded in polyimide, and physical and chemical properties of polyimide/ZnO composite materials have been studied. It is found that different ZnO content will cause UV absorption edge blue shift, and EL tests show that electricity aging and pre-breakdown have changed. For PI/ZnO(1%) and PI/ZnO(2%) composite materials, Electricity aging is at 1.4Mv/cm and 1.5Mv/cm, Pre-breakdown field is at 1.9Mv/cm and 1.8Mv/cm, respectively. In addition, there are emission peaks at 442.8nm, 514.2nm, 609.4nm in the EL spectrum of the PI/ZnO (1%) films and 538nm, 633.2nm of PI/ZnO(2%) films, which indicates that some defects in this area.

scholarly journals A Short Review on 3-d Printing of FRP Composites Using Stereolithography

2021 ◽  
Author(s):  
Girish Dutt Gautam ◽  
◽  
Sunita Rani ◽  
Sudhanshu Raghuwanshi ◽  
Samendra Singh ◽  
...  
Keyword(s):  
Composite Materials ◽  
Chemical Properties ◽  
Short Review ◽  
Product Diversification ◽  
Frp Composites ◽  
Frp Composite ◽  
Reinforced Polymer ◽  
Critical Issues ◽  
Manufacturing Techniques ◽  
Application Specific

A higher product diversification range with excellent physical, mechanical and chemical properties make Fiber-reinforced polymer (FRP) composite materials a prominent candidate for engineering applications. But, conventional manufacturing techniques always face critical issues during the development of FRP's complex and intrinsic profile. In recent years, Additive Manufacturing (AM) or 3-D printing proves itself a robust technique to produce application-specific parts of FRP composites with a higher degree of customization. In comparison to other 3D printing techniques, Stereolithography (SLA) is able to create mechanically stable objects with higher processing speed. This information paves the way for the present review article. This paper reviews the recent advancement of SLA technique to develop objects of FRP composite materials.

Superdeep Penetration - Novel Method of Nanoreinforced Composites Producing Based on Metallic, Ceramic and Polymer Matrixes

2009 ◽  
Vol 79-82 ◽  
pp. 1975-1978
Author(s):  
Oleg Figovsky ◽  
Sergey Usherenko
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Chemical Properties ◽  
Second Stage ◽  
Superdeep Penetration ◽  
Third Stage ◽  
Novel Method ◽  
Two Stages ◽  
Physical And Chemical ◽  
And Chemical Properties

Now there is a motivation for creation of the materials possessing a considerable difference of physical and chemical properties in volume of composite materials 1 . Composite materials allow realizing a complex of various properties which cannot be realized simultaneously in mono material. The perspective in reception of a new smart nanomaterial is basically defined by possibilities which create processing conditions Choosing and manufacturing of fibers refers to the second stage of composite material reinforcement. Process of assemblage of a composite material from the details made at first two stages of process refers to the third stage. But at each stage of process of manufacturing of a composite material there are specific problems. The basic problem at composite material creation, as a rule, is essential contradictions between engineering solutions for various stages of process.

scholarly journals Ferroelastic Twinning in Minerals: A Source of Trace Elements, Conductivity, and Unexpected Piezoelectricity

Minerals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 478
Author(s):  
Ekhard K. H. Salje
Keyword(s):  
Chemical Properties ◽  
Topological Defects ◽  
Short Review ◽  
Major Research ◽  
Wall Properties ◽  
Structural Deformations ◽  
Research Initiatives ◽  
Physical And Chemical ◽  
Future Work ◽  
And Chemical Properties

Ferroelastic twinning in minerals is a very common phenomenon. The twin laws follow simple symmetry rules and they are observed in minerals, like feldspar, palmierite, leucite, perovskite, and so forth. The major discovery over the last two decades was that the thin areas between the twins yield characteristic physical and chemical properties, but not the twins themselves. Research greatly focusses on these twin walls (or ‘twin boundaries’); therefore, because they possess different crystal structures and generate a large variety of ‘emerging’ properties. Research on wall properties has largely overshadowed research on twin domains. Some wall properties are discussed in this short review, such as their ability for chemical storage, and their structural deformations that generate polarity and piezoelectricity inside the walls, while none of these effects exist in the adjacent domains. Walls contain topological defects, like kinks, and they are strong enough to deform surface regions. These effects have triggered major research initiatives that go well beyond the realm of mineralogy and crystallography. Future work is expected to discover other twin configurations, such as co-elastic twins in quartz and growth twins in other minerals.

A Study of Some Mechanical and Chemical Properties of Composite Materials Made Up of UPR and ISO/NPG Granules of the Type of Buzi/Perdido Cromate

2018 ◽  
Vol 69 (5) ◽  
pp. 1045-1049
Author(s):  
Ion Ciuca ◽  
Marius Marinel Stanescu ◽  
Dumitru Bolcu ◽  
Luminita Florentina Deaconu (Stanescu)
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Modulus Of Elasticity ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Characteristic Curve ◽  
Chemical Properties ◽  
Unsaturated Polyester Resin ◽  
Ftir Analysis ◽  
And Chemical Properties

In this work we have measured the mechanical properties for unsaturated polyester resin (UPR) and unsaturated polyester resin mixed with isophthalic resin granules NPG (Neopentyl Glycol) of the type of Buzi/Perdido Chromate. All sets of samples underwent compression testing. We obtained the characteristic curve, the admissible resistance to compression, and the modulus of elasticity for each sample. Moreover, on the basis of FTIR analysis we measured the type of bonds (C-O, C=O, C-C and various bonds in the functional groups) in each polymer.

Study on Al2O3 Coated Carbon Sulfur Composite Materials for Lithium-Ion Battery

2013 ◽  
Vol 860-863 ◽  
pp. 952-955
Author(s):  
Xing Hua Liang ◽  
Chao Chao Ye ◽  
Yu Si Liu ◽  
Tian Jiao Liu ◽  
Lin Shi
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Retention Rate ◽  
Chemical Properties ◽  
Lithium Ion ◽  
Cycle Performance ◽  
Impregnation Method ◽  
Physical And Chemical ◽  
Coated Carbon ◽  
And Chemical Properties

Coated Al2O3thin film on the surface of the carbon sulfur composite material by liquid phase impregnation method, then made physical and chemical properties and electrochemical performance analysis on the coated carbon sulfur composite materials.Al2O3reduce the direct contact of the carbon sulfur composite materials and electrolyte, reducing the erosion of electrolyte on cathode materials, improve the cycle performance of carbon sulfur composite material. 0.1C in the 2.1~3.2v cycle 20 to 100 times. The capacity retention rate increased from 70% to 90% after coating.

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