Material Design and Experiment Test of a High-Impedance Complex Film

2017 ◽  
Vol 1142 ◽  
pp. 183-187 ◽  
Author(s):  
Jin Tao Liu ◽  
Yong Li ◽  
Chun Lan Feng
Keyword(s):  
Mechanical Properties ◽  
Space Station ◽  
Physical And Mechanical Properties ◽  
Material Design ◽  
Film Material ◽  
Chemical Corrosion ◽  
High Impedance ◽  
Resistance Property ◽  
Corrosion Resistance Property ◽  
Complex Film

A novel high-impedance compound film material has been developed to satisfy the reservoir of many kinds of space liquid in space station. Considering the high gas-resistance and liquid-resistance, and its compatibility with the liquid in space station, the complex film was designed using 9 layers materials. The compatibility experiment and mechanical properties experiment showed that the high-impedance complex film has good compatibility with drinking water in space station. It also has excellent heat seal ability, physical and mechanical properties. The complex film also has high gas-resistance and water-resistance property, as well as great chemical corrosion-resistance property. The high-impedance complex film material offers a new method for the design and application of liquid container in space station.

scholarly journals Effect of Energy Density on the Microstructure and Properties of the CrFeCoNiNb High Entropy Cladded Layer

2021 ◽  
Author(s):  
Pengfang Song ◽  
Fulin Jiang ◽  
Yuling Wang ◽  
Fazhan Yang ◽  
Zhaolin Zhong
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Energy Density ◽  
High Entropy Alloy ◽  
Ocean Engineering ◽  
High Entropy ◽  
Resistance Property ◽  
Corrosion Resistance Property ◽  
Structural Applications ◽  
Mechanical Properties And Corrosion

Abstract A synergistic combination of mechanical properties and corrosion resistance property is desired for most ocean engineering structural applications. In this paper, we prepared high entropy alloy (HEA) cladded layer of composition CrFeCoNiNb (atomic%). We aim to attain a balance between the mechanical property and the corrosion resistance property through adjusting the energy density. The prepared CrFeCoNiNb cladded layer with the energy density of 116.7J/mm2 exhibited excellent mechanical properties and high corrosion resistance. The improved mechanical properties are attributed to the fine grain strengthening, solid solution strengthening and dispersion strengthening. Whereas the excellent corrosion resistance is due to the fine grained BCC single phase structure and the compact passivation film. The variation of the mechanical properties and corrosion resistance with different energy densities are attribute to the phase composition. The diffraction peak area of the main phase of BCC decreases first and then increases with the increase of energy density, which is the main reason that the hardness of the cladded layer follows the similar trend. The outcome of our research suggests that the prepared CrFeCoNiNb cladded layer could be explored to realise surface strengthening of load-bearing parts in marine engineering equipment.

scholarly journals Mechanical Properties of Tonalite Subjected to Combined Effects of Chemical Corrosion and Freeze-Thaw Cycles

2019 ◽  
Vol 9 (18) ◽  
pp. 3890 ◽  
Author(s):  
Chao Xu ◽  
Youliang Chen ◽  
Suran Wang ◽  
Akbar Javadi ◽  
Xi Du ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Physical And Mechanical Properties ◽  
Bending Test ◽  
Uniaxial Compression Test ◽  
Combined Effects ◽  
Chemical Corrosion ◽  
Freeze Thaw ◽  
Scanning Electron

This paper presents an investigation into the coupled effects of chemical corrosion (by Nitric acid solution) and freeze-thaw cycles on the physical and mechanical properties and damage deterioration of tonalite specimens. The experiments included the uniaxial compression test, three-point bending test, the Young’s modulus test, the X-ray diffraction test and the scanning electron microscope test. The damage condition of tonalite specimens was analyzed using scanning electron microscope (SEM). The experimental results reveal that chemical erosion has a significant influence on the propagation of micro cracks and accelerates the development of damage in the tonalite samples under monotonic loading. Due to cementation, no noticeable difference in uniaxial compressive strength was observed between the specimens subjected to combined effects of chemical corrosion and freeze-thaw cycles and those subjected to freeze-thaw cycles only. The amount of cementing materials in the chemically treated samples was found using SEM, which shows that chemical reactions promoted mechanical properties to some extent.

scholarly journals Prediction of Mechanical Alterations in Multi-Layer Sbs-Modified Hot Mix Asphalt and Soil-Foundation Structure

2021 ◽  
Vol 16 (3) ◽  
pp. 159-194
Author(s):  
Ahmet Sertac Karakas ◽  
Faruk Ortes
Keyword(s):  
Mechanical Properties ◽  
Service Life ◽  
Mechanical Response ◽  
Hot Mix Asphalt ◽  
Empirical Studies ◽  
Chemical Properties ◽  
Physical And Mechanical Properties ◽  
Material Design ◽  
Ground Layer ◽  
Stress And Deformation

Traffic and environmental conditions are key parameters in road applications. Empirical studies and numerical analyses, which are widely adopted in material design studies, are used for analysing superstructures of the roads, and developmental approaches are improved for future designs as well. In flexible pavements, polymer and fibre-reinforced additives are frequently used to make them durable against deteriorations and to extend their service life. One of the additives that is mostly preferred is the Styrene Butadiene Styrene (SBS) material thanks to a variety of their physical and chemical properties. Physical and mechanical properties of the natural ground layer and its interactions with the superstructure are crucial parameters in terms of performance under various environmental and traffic conditions. In this study, the use of SBS-modified Hot Mix Asphalt (HMA) was examined as a flexible superstructure, and the mechanical properties of the granular base and the natural ground layer were tested. The stress and deformation occurring within layers in various periods were also considered. The presented study is a suitable tool for the use of additives that significantly contribute to the mechanical properties and service life of the roads. In this study, it is concluded that the use of additives significantly improves the mechanical response and service life of the roads.

Research of the Influence of the Polymer Composition Structure on the Film Material Properties for Special Clothes Production

2021 ◽  
Vol 899 ◽  
pp. 98-103
Author(s):  
Olga V. Meteleva ◽  
Ludmila I. Bondarenko ◽  
Tatyana Komarova
Keyword(s):  
Mechanical Properties ◽  
Material Properties ◽  
Protective Clothing ◽  
Physical And Mechanical Properties ◽  
Polymer Composition ◽  
Film Material ◽  
Performance Properties ◽  
Research Results ◽  
Composition Structure

The paper presents the influence research results of the structure of the original polymer composition on the resulting films physical and mechanical properties. Films are intended for gluing of protective clothing thread connections. It is shown that the change of the composition viscosity in the studied interval does not have a significant effect on the finished material performance properties.

Experimental Study for Performance Influence of Various pH Values on Pavement Straw Composite Fibers

2009 ◽  
Vol 79-82 ◽  
pp. 1783-1786
Author(s):  
Qiang Xue ◽  
Jing Wang ◽  
Xia Ting Feng ◽  
Xiao Li Liu
Keyword(s):  
Mechanical Properties ◽  
Fractal Dimension ◽  
Constitutive Model ◽  
Structural Characteristics ◽  
Physical And Mechanical Properties ◽  
Composite Fibers ◽  
Chemical Corrosion ◽  
Ph Values ◽  
Straw Composite ◽  
Particle Area

Pavement straw composite fibers (PSCF), a new material, were independently invented and developed by blending agriculture waste straw and modified bentonite, as showed in this paper. The chemical corrosion properties of PSCF in different pH values were test in microscale, and digital imaging processing technology was adopted to analyzing quantitatively the physical and mechanical properties, including particle area, pores connectivity rate and compressive strength, before and after PSCF were corroded. Research results show that the particle area of acidified PSCF is smaller than that of alkalized PSCF, however, the fractal dimension of acidified PSCF is bigger than that of alkalized PSCF. The change of PSCF microstructure has significant effect on its macromechanics properties. The compressibility of acidified PSCF was obviously bigger than that of alkalized PSCF, so the strength of acidified PSCF decreased significantly with the acidifying time increasing. The main reason was gradually decreasing of the particle area, decreasing of the fractal dimension and the loose tendency of fibers particle distribution. The interaction between mineral composition of PSCF and hydrochemistry solution was the basic factors determining straw structural characteristics, and the physical and mechanical properties of PSCF were affected by its structural characteristics. The main process was that mineral compositions of PSCF were cemented by the corrosive action of hydrochemistry solution, or some compositions were dissolved and precipitated, the porosity and particle area of PSCF, the arrangement pattern of soil particles as well as other microstructures changed. And deformation properties of PSCF changed correspondingly with the change of PSCF structure shape. Moreover, the constitutive model of PSCF with effect of acid and alkali was presented according to test data of digital image. It provided reliable techniques to quantitatively evaluate the pavement performance of PSCF in micro and macro scales. Furthermore, the chemical corrosion theory was improved, and the reference for constitutive model research was provided.

PEMANFAATAN KAYU AKASIA MANGIUM (Acacia mangium Willd) UNTUK MEBEL

2012 ◽  
Vol 4 (1) ◽  
pp. 1
Author(s):  
Djoko Purwanto
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Physical Properties ◽  
Treatment Process ◽  
Acacia Mangium ◽  
Physical And Mechanical Properties ◽  
Wood Fibers ◽  
Test Parameters ◽  
Mechanical And Physical Properties ◽  
Scale Scores

Timber Acacia mangium (Acacia mangium, Willd) for Furniture. The study aims to determine the mechanical and physical properties and the decorative value (color and fiber) wood of acacia mangium with using finishing materials. This type of finishing material used is ultran lasur natural dof ,ultran lasur classic teak, aqua politur clear dof, aqua politur akasia dan aqua politur cherry. After finishing the wood is stored for 3 months. Test parameters were observed, namely, physical and mechanical properties of wood, adhesion of finishing materials, color and appearance of the fiber, and timber dimensions expansion. The results showed that the mechanical physical properties of acacia wood qualified SNI. 01-0608-89 about the physical and mechanical properties of wood for furniture, air dry the moisture content from 13.78 to 14.89%, flexural strength from 509.25 to 680.50 kg/cm2, and compressive strength parallel to fiber 342.1 - 412.9 kg/cm2. Finishing the treatment process using five types of finishing materials can increase the decorative value (color and fiber) wood. Before finishing the process of acacia mangium wood has the appearance of colors and fibers and less attractive (scale scores 2-3), after finishing acacia wood fibers have the appearance of colors and interesting and very interesting (scale 4-5).Keywords: mangium wood, mechanical properties, decorative value, finishing, furniture.

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