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 Influence of temperature regimes of ripening and fermentation stages on the physical and chemical properties of cream and sour-cream butter quality indicators

2018 ◽  
Vol 12 (3) ◽  
Author(s):  
O. O. Bondarchuk
Keyword(s):  
Milk Fat ◽  
Raw Materials ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Second Stage ◽  
Temperature Regimes ◽  
Third Stage ◽  
Sour Cream ◽  
Physical And Chemical ◽  
And Chemical Properties

Physical and chemical properties of cream multistep modes of ripening and fermentations are investigation and their role in the production of sour-cream butter is studied. The process of ripening of cream was carried out multistep, regimes were selected depending on seasonal changes in the composition of milk fat. For raw materials of the autumn-winter period, for the values of iodine number 29.1–34.5, the first stage of ripening was carried out at a temperature of 8°C for 2 hours, the second stage – at 21°C for 7 hours, the third stage – at 13°C for 10 hours. For raw of spring-summer period, for the values of iodine number 34.5–40.1, the first stage of ripening was carried out at 21°C for 6 hours, the second stage – at 13°C for 4 hours, the third stage – at 8°C for 8 hours. It has been established that individual modes of low-temperature cream preparation, taking into account seasonal changes in the composition of milk fat, make it possible to obtain cream before churning almost with the same indexes of effective viscosity. The content of the crystalline phase of milk fat under both temperature regimes was 38.7–40.1%, which is sufficient to obtain of proper consistency sour-cream butter. The content of diacetyl and volatile organic acids more depend on the level of fermentation of cream than on the technological regimes of ripening and seasonality of raw materials. It has been proved that an increase in the fermentation degree of cream promotes an increase in the acidity of plasma and the content of aroma-producing components in the butter, and, accordingly, affects the degree of the sour taste. It is recommended for the production of cultured butter to begin the cream when the acidity of the plasma reaches 60ºT, which ensures the formation of high sensorial characteristic of the finished product.

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.

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.

scholarly journals Fracture analysis and countermeasures of the grid switch castings

2020 ◽  
Vol 165 ◽  
pp. 06015
Author(s):  
Chao Feng ◽  
Siyuan Yang ◽  
Qiao Li ◽  
Mengbao Zhou ◽  
Songqi Wu ◽  
...  
Keyword(s):  
Chemical Properties ◽  
Fracture Analysis ◽  
Casting Defects ◽  
Physical And Chemical Properties ◽  
Direct Reading ◽  
X Ray ◽  
Detection Technology ◽  
Two Stages ◽  
Physical And Chemical ◽  
And Chemical Properties

Based on the detection technology of direct reading spectrum, metallographic microscope and X-ray, the defects of the grid switch castings were analyzed. The four main forms of casting fracture were summarized as poor physical and chemical properties, material misuse, casting defects and designing defects. In order to strengthen the quality control of the source of the product, it was proposed to carry out targeted network inspection in the two stages of material arrival and infrastructure acceptance.

Mechanical Property of Brucite Fiber Reinforced Composite Material

2013 ◽  
Vol 357-360 ◽  
pp. 1019-1022 ◽  
Author(s):  
Bo Wen Guan ◽  
Shuan Fa Chen ◽  
Kai Ping Liu
Keyword(s):  
Mechanical Property ◽  
Composite Material ◽  
Chemical Properties ◽  
Reinforce Concrete ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite ◽  
Physical And Chemical ◽  
And Chemical Properties ◽  
Reinforced Composite Material

In this paper, microstructure of brucite fiber was introduced briefly and its physical and chemical properties were given. Disperse method of fiber applied in concrete has been introduced. The effect of compressive strength, flexural strength of concrete and cement mortar by the addition of brucite fiber have also been discussed. The mechanism that fiber can reinforce concrete has been discussed. The results showed that the diameter of brucite fiber changes from micrometer scales to nanometer dimension with the dispersing action of water reducers. Brucite fiber can exert its high tensile strength on concrete and improve the mechanical property of cement motar and concrete. Life of bructie fiber reinforced composite material can be prolonged by the addition of brucite fiber.

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.

On Extremal Graphs of Degree Distance Index by Using Edge-Grafting Transformations Method

2020 ◽  
Vol 23 ◽  
Author(s):  
Muhammad Imran ◽  
Shehnaz Akhtar ◽  
Uzma Ahmad ◽  
Sarfraz Ahmad ◽  
Ahsan Bilal
Keyword(s):  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Extremal Graphs ◽  
Graph Invariant ◽  
Degree Of Vertex ◽  
Degree Distance ◽  
Novel Method ◽  
Physical And Chemical ◽  
And Chemical Properties ◽  
Domination Numbers

Background: Topological indices have numerous implementations in chemistry, biology and in lot of other areas. It is a real number associated to a graph, which provides information about its physical and chemical properties and their correlations. For a connected graph H, the degree distance defined as DD(H)=∑_(\h_1,h_2⊆V(H))〖(〖deg〗_H (h_1 )+〖deg〗_H (h_2 )) d_H (h_1,h_2 ) 〗, where 〖deg〗_H (h_1 ) is the degree of vertex h_1and d_H (h_1,h_2 ) is the distance between h_1and h_2in the graph H. Aim and Objective: In this article, we characterize some extremal trees with respect to degree distance index which has a lot of applications in theoretical and computational chemistry. Materials and Methods: A novel method of edge-grafting transformations is used. We discuss the behavior of DD index under four edge-grafting transformations. Results: By the help of those transformations, we derive some extremal trees under certain parameters including pendant vertices, diameter, matching and domination numbers. Some extremal trees for this graph invariant are also characterized. Conclusion: It is shown that balanced spider approaches to the smallest DD index among trees having given fixed leaves. The tree Cn,d has the smallest DD index, among the all trees of diameter d. It is also proved that the matching number and domination numbers are equal for trees having minimum DD index.

scholarly journals SiO2@TiO2 Composite Synthesis and Its Hydrophobic Applications: A Review

Catalysts ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 171
Author(s):  
Alicia Rosales ◽  
Karen Esquivel
Keyword(s):  
Composite Material ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Research Information ◽  
Chemical Methods ◽  
Wide Range ◽  
Methods Of Synthesis ◽  
Low Toxicity ◽  
Physical And Chemical ◽  
And Chemical Properties

Titanium dioxide is well known for its photocatalytic properties and low toxicity, meanwhile, silicone dioxide exhibits hydrophobic and hydrophilic properties and thermal stability. The union of these two materials offers a composite material with a wide range of applications that relate directly to the combined properties. The SiO2-TiO2 composite has been synthesized through physical methods and chemical methods and, with adequate conditions, morphology, crystallinity, boundaries between SiO2-TiO2, among other properties, can be controlled. Thus, the applications of this composite are wide for surface applications, being primarily used as powder or coating. However, the available research information on this kind of composite material is still novel, therefore research in this field is still needed in order to clarify all the physical and chemical properties of the material. This review aims to encompass the available methods of synthesis of SiO2-TiO2 composite with modifiers or dopants, the application and known chemical and physical properties in surfaces such as glass, mortar and textile, including aspects for the development of this material.

scholarly journals KAJIAN SIFAT FISIK DAN KIMIA JERUK SIAM (Citrus nobilis var. microcarpa) SEMBORO BERDASARKAN UMUR SIMPAN MENGGUNAKAN PENGOLAHAN CITRA DIGITAL

2019 ◽  
Vol 23 (1) ◽  
pp. 68
Author(s):  
Herman Setiawan ◽  
Dedy Wirawan Soedibyo ◽  
Dian Purbasari
Keyword(s):  
Shelf Life ◽  
Chemical Properties ◽  
Fruit Weight ◽  
Physical And Chemical Properties ◽  
Code Size ◽  
Two Stages ◽  
Physical And Chemical ◽  
Non Destructive ◽  
And Chemical Properties

Since hundreds of years ago, orange have grown in Indonesia either naturally or cultivated. One of the most popular places for producing orange varieties is Semboro, Jember Regency. The quality of Semboro oranges is influenced by the level of harvest age and shelf life. In the storage process, Orange expiriences physically and chemical changes at each shelf life which is detrimental. At present the tests performed on Semboro orange are destructive. Based on this, non-destructive measurements are needed by using other methods such as digital image processing. The purpose of this study was to identify the relationship between the physical and chemical properties of Semboro orange based on shelf life. The Semboro Orange used was 150 fruits of super quality with  code size 1 and the same picking age of 28 MSB (weeks after flowering). Semboro oranges are stored for 15 days and measured with variations in shelf life of 1, 8 and 15 days. This research was conducted in two stages, namely taking pictures and measuring physical and chemical characteristics. Orange samples were then measured interm of physical and chemical properties using the O'hauss pioneer digital scales, penetrometer, refractometer and pH meter to obtain data on fruit weight, fruit hardness, total dissolved solids and acidity (pH) of the fruit. The value of the image quality variable and the physical and chemical properties were analyzed using one way anova test, correlation, regression, boxplot and validation test.

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