Studying the Performance of Composites Based on Thermally Modified and UV-Treated Wood

2021 ◽  
Vol 316 ◽  
pp. 121-126
Author(s):  
R.R. Khasanshin ◽  
R.R. Safin ◽  
S.R. Mukhametzyanov
Keyword(s):  
Moisture Absorption ◽  
Treated Wood ◽  
High Strength ◽  
Industrial Applications ◽  
Surface Wettability ◽  
Uv Exposure ◽  
Material Surface ◽  
Pressing Time ◽  
The Cost

To enhance the quality of wood and extend its industrial applications, various methods of wood modification are being developed. It is well known that the thermal treatment of wood may considerably enhance its moisture resistance, reduce its hygroscopicity, and increase its rot proofing. However, reducing the absorptive capacity of wood adversely affects the process of obtaining wood-based composites. Pressure and pressing time increase, which finally increases the cost of the end product. Thus, this study represents the research in how ultraviolet exposure affects the physical properties of wood that has been pre-treated thermally, followed by obtaining a composite. An experimental wood-modifying facility has been developed. We have considered the process of the moisture absorption of the material that has been exposed to thermal modification and UV-radiation. From the experiments conducted, we have found that the UV exposure of wood samples causes an increase in the surface wettability of the thermally modified material. It is found that the most active process of surficial inactivation runs within 60-90 minutes of the UV-exposure of wood. Post-treatment does not result in any considerable changes in the surface wettability. This treatment promotes the increasing adhesion of water-borne binders to the material surface in developing high-strength composites based on modified wood.

scholarly journals Carbon fiber. Obtaining, modification, properties, applications.

2020 ◽  
Vol 62 (5) ◽  
pp. 1-42
Author(s):  
Anna N. Nurmukhametova ◽  
Keyword(s):  
Carbon Fiber ◽  
Carbon Fibers ◽  
High Performance ◽  
Waste Heat ◽  
High Strength ◽  
Subject Area ◽  
Reinforced Plastic ◽  
The Cost ◽  
Polyacrylonitrile Precursor

The main methods for producing a polyacrylonitrile precursor, methods for producing carbon fiber, its properties, and applications are presented. Patent research in the field of polyacrylonitrile precursor and carbon fiber. Technological problems in the subject area are identified, namely the development of technologies and equipment for producing high-strength carbon fiber, the development of technologies and equipment to reduce the cost of carbon fiber production, the development of technologies for improving the quality of carbon fiber-based composites, and the main ways to solve them are given. Ways to solve them are developing a technology for producing a polyacrylonitrile precursor for producing high-strength carbon fibers by the wet spinning method, developing a “dry-wet” method for producing polyacrylonitrile, developing high-performance equipment for producing technical polyacrylonitrile precursor in the form of bundles, developing technologies and equipment for efficient regeneration and utilization waste, heat and emissions from the production of carbon fibers, the development of new compositions of precursors and the transition to materials with a higher linear density, optimization of the structure of carbon fiber reinforced plastic to increase strength, the development of technologies and the creation of production of modern types of binders, including the addition of nanoparticles. The main methods for modifying the surface of a carbon fiber that are currently existing are considered.

The impact of heavy machine-tractor units on the efficiency of agricultural production

2020 ◽  
pp. 58-66
Author(s):  
Nazib K. Mazitov ◽  
Rustem L. Sakhapov ◽  
Salavat G. Mudarisov ◽  
Rais S. Rakhimov ◽  
Nurvil’ E. Garipov
Keyword(s):  
Agricultural Production ◽  
Moisture Absorption ◽  
Research Purpose ◽  
Air Contamination ◽  
State Tests ◽  
Farmland Soil ◽  
The Republic ◽  
The Cost ◽  
The Impact

The use of foreign technology in agricultural production leads to a decrease in productivity, product quality, and output from crop rotations of farmland, soil compaction. (Research purpose) The research purpose is in identifying the causes of food dependence in Russia and ways to solve the problems of security and independence of agricultural production. (Materials and methods) Authors analyzed the parameters of some heavy imported and domestic tractors, including the weight and engine power. Authors have evaluated the effectiveness of various tractor-seeding units using the results of State tests of imported and domestic units of the Volga machine testing station at Soyuz-agro LLC in the Almetyevsk district of the Republic of Tatarstan. (Results and discussion) The article shows that the heavier the unit, the more expensive it is and the higher the amortization, which affects the cost of production. The article shows that heavy aggregates compact the soil, causing the exclusion of moisture absorption, destruction of soil flora and fauna, and delay in the development of the root system of plants. The article points out that the increased emission of exhaust gases from heavy-duty tractors into the atmosphere leads to air contamination, contamination of fruits and cereals, and an increase in the number of severe and complex diseases. The results of comparative tests showed that the cost of seeding on domestic complexes is almost 4 times less than the cost of seeding on foreign ones. (Conclusions) To restore reliable production of high-quality grain, it was proposed to use domestic tractors with a complex of block-modular equipment produced by PC "Yaroslavich" and LLC "Varnaagromash", the introduction of which will increase the quality of grain and yield by 2.5 times, reduce costs by 3 times.

scholarly journals Effect of Electrode Waterproof Coating on Quality of Underwater Wet Welded Joints

Materials ◽  
2020 ◽  
Vol 13 (13) ◽  
pp. 2947 ◽  
Author(s):  
Jacek Tomków ◽  
Dariusz Fydrych ◽  
Kamil Wilk
Keyword(s):  
Hydrogen Content ◽  
Welded Joints ◽  
High Strength ◽  
Industrial Applications ◽  
Cold Cracking ◽  
Diffusible Hydrogen ◽  
Deposited Metal ◽  
Covered Electrodes ◽  
Steel Joints

In this paper, the effects of different hydrophobic coatings on the surface of covered electrodes on the quality of wet welded carbon steel joints were discussed. Commonly available hydrophobic substances used in industrial applications were selected for the research. The aim of using waterproof coatings was to check the possibility to decreasing the susceptibility of high-strength low-alloy S460N steel to cold cracking. During experiments diffusible hydrogen content in deposited metal determination by mercury method, metallographic macro- and microscopic testing and hardness measurements were performed. Investigations showed that waterproof coatings laid on covered electrodes can improve the quality of wet welded joints, by decreasing the Vickers HV10 hardness in heat-affected zone and decreasing the diffusible hydrogen content in deposited metal, which minimalize possibility of cold cracking.

scholarly journals The Molds in Injection Process for the Achievement of Business Objectives

2017 ◽  
Vol 15 (1) ◽  
Author(s):  
Julio César Acosta-Prado ◽  
Ricardo Prada Ospina
Keyword(s):  
Gray Cast Iron ◽  
Industrial Applications ◽  
Economic Benefits ◽  
Production Costs ◽  
Strong Impact ◽  
Injection Process ◽  
Proper Design ◽  
The Cost ◽  
Plastic Injection

The injection molding is a process that has been emerging in the industry, due to the technical and economic benefits obtained with reference to other processing of materials. Currently, parts with specific requirements found in this process the best solution, displacing traditional materials (bronze, aluminum, gray cast iron or steel, etc.) in industrial applications. The level of complexity, the quality of materials and the number of cavities affect the cost of the mold. In order to establish an appropriate relationship between production costs and the mold must be defined well, figure to be injected, the number of parts and the cost of the mold. This article aims to make an approximation of the theoretical and economic calculations applied to mold plastic injection process. Finally, it was found that the mold, not only has a strong impact to the profitability of the process, but its proper design depends on the competitive position of the plastics factories. La inyección de plásticos es un proceso que se ha venido abriendo paso en la industria, debido a los beneficios técnicos y económicos obtenidos en referencia a otros procesos de transformación de materiales. Actualmente, piezas con requerimientos específicos han encontrado en este proceso la mejor solución, desplazando a materiales tradicionales (bronce, aluminio, fundición de hierro gris o de acero, etc.) en aplicaciones industriales. El nivel de complejidad, la calidad de los materiales y el número de cavidades inciden en el costo del molde. Para poder establecer una relación adecuada entre costos de producción y el molde se deben definir bien, la figura a inyectar, el número de piezas y el costo del molde. Este artículo pretende realizar una aproximación de los cálculos teóricos y económicos aplicados al molde del proceso de inyección de plástico. Finalmente, se encontró que el molde, no solo presenta una fuerte incidencia con la rentabilidad del proceso, sino que de su adecuado diseño depende la posición competitiva de las fábricas de plásticos.Injeção de plástico é um processo que tem vindo a surgir na indústria, devido aos benefícios técnicos e econômicos em referência a outro processamento de materiais. Atualmente, as peças com requisitos específicos encontrados neste processo a melhor solução, deslocando materiais tradicionais (bronze, alumínio, ferro fundido cinzento ou aço, etc.) em aplicações industriais. O nível de complexidade, a qualidade dos materiais e o número de cavidades afetar o custo do molde. A fim de estabelecer uma relação adequada entre os custos de produção e o molde deve ser bem definida, a figura a ser injetado, o número de peças e o custo do molde. Este artigo tem como objetivo fazer uma aproximação dos cálculos teóricos e econômicas aplicadas para moldar processo de injeção de plástico. Finalmente, verificou-se que o molde, não só tem um forte impacto para a rentabilidade do processo, mas o seu design adequado depende da posição competitiva das fábricas de plástico. 

scholarly journals Experimental Investigation of the Friction Stir Weldability of AA8006 with Zirconia Particle Reinforcement and Optimized Process Parameters

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2782
Author(s):  
Thanikodi Sathish ◽  
Abdul Razak R. Kaladgi ◽  
V. Mohanavel ◽  
K. Arul ◽  
Asif Afzal ◽  
...  
Keyword(s):  
Friction Stir Welding ◽  
Process Parameters ◽  
High Strength ◽  
Zirconia Particle ◽  
Friction Stir ◽  
Microscopy Investigation ◽  
Electron Microscopy Analysis ◽  
Joint Quality ◽  
The Cost

A lightweight, highly corrosive resistant, and high-strength wrought alloy in the alumi-num family is the Aluminium 8006 alloy. The AA8006 alloy can be formed, welded, and adhesively bonded. However, the recommended welding methods such as laser, TIG (Tungsten Inert Gas welding), and ultrasonic are more costly. This investigation aims to reduce the cost of welding with-out compromising joint quality by means of friction stir welding. The aluminum alloy-friendly re-inforcement agent zirconia is utilized as particles during the weld to improve the performance of the newly identified material AA8006 alloy in friction stir welding (FSW). The objectives of this research are to identify the level of process parameters for the friction stir welding of AA8006 to reduce the variability by the trial-and-error experimental method, thereby reducing the number of samples needing to be characterized to optimize the process parameters. To enhance the quality of the weld, the friction stir processing concept will be adapted with zirconia reinforcement during welding. The friction stir-processed samples were investigated regarding their mechanical proper-ties such as tensile strength and Vickers microhardness. The welded samples were included in the corrosion testing to ensure that no foreign corrosive elements were included during the welding. The quality of the weld was investigated in terms of its surface morphology, including aspects such as the dispersion of reinforced particles on the welded area, the incorporation of foreign elements during the weld, micro defects or damage, and other notable changes through scanning electron microscopy analysis. The process of 3D profilometry was employed to perform optical microscopy investigation on the specimens inspected to ensure their surface quality and finish. Based on the outcomes, the optimal process parameters are suggested. Future directions for further investigation are highlighted.

Effect of the Mould Rotational Speed on the Quality of Bimetallic Pipe Fabricated by Centrifugal Casting Process

2018 ◽  
Vol 6 (7) ◽  
pp. 215
Author(s):  
Shatrudhan Pandey ◽  
Shreyanshu Parhi ◽  
Sanjay Kumar Jha
Keyword(s):  
Elevated Temperatures ◽  
Centrifugal Casting ◽  
High Strength ◽  
Casting Process ◽  
Industrial Applications ◽  
Bond Quality ◽  
X Ray ◽  
Wide Range ◽  
Bimetallic Pipe

Bimetallic pipes have found a wide range of applications in the present market scenario. It is due to the fact that they possess really impressive mechanical properties like high corrosion resistance at elevated temperatures, high strength, high toughness, etc. The bimetal pipes can be made by using several combinations of metals depending on the requirements like Al-Cu, Al-Ni, etc. Bimetallic pipes are manufactured by the principle of cladding where one metal is made to clad over another one. They have found their applications in steam condenser, heat exchangers, water supply, industrial applications, etc. These pipes are manufactured using the centrifugal casting process. This paper deals with the effect of the various mould rotational speeds on the quality of the bond produced in the Al-Cu bimetallic pipe while fabricating through the centrifugal casting process. The vertical centrifugal casting setup is used for the process. The detailed analysis of the bond quality is done using Scanning Electron Microscope (SEM). Furthermore, the chemical composition of the bond is studied by using Energy Dispersive X-Ray Spectroscopy (EDS). The strength and quality of the Al-Cu bimetallic bond is studied at varying rotational speeds of the mould and finally the observations are taken. The conclusion is framed accordingly based on the observations.

scholarly journals Effective Utilization of Quarry Residues and Mineral Admixtures in High Strength Concrete

2019 ◽  
Vol 8 (10) ◽  
pp. 2652-2658
Keyword(s):  
High Strength ◽  
Mineral Admixtures ◽  
Chloride Ingress ◽  
Concrete Durability ◽  
Green Concrete ◽  
Granulated Blast Furnace Slag ◽  
Cost Impact ◽  
Carbon Dioxide Co2 ◽  
The Cost

The various requesting utilization of cement is not promptly met with Ordinary Portland cement (OPC) alone. To satisfy up the need and just as guaranteed the green concrete durability, it has ends up important to add mineral increments with the best blend of others by-product as substitution to improve the performance without risking the quality of the concrete. In the construction industry, OPC cement and stream sand are utilized as significant material making it rare and restricted. While, with respect to the cement is notable as the greatest guilty parties for discharging carbon dioxide (CO2). Consequently, incomplete substitution of cement turns into a need just as common sand in concrete by waste material or byproduct without bargaining the nature of the finished result. Fractional supplanting with Ground Granulated Blast furnace Slag (GGBS), Silica Fume (SF) fuses with 100% of quarry dust (QD) as sand substitution has been utilized. The utilization of 100% QD with OPC+SF delivered increasingly durable concrete with low chloride ingress and preferred outfitting over with 100% stream sand. Notwithstanding the cost impact advantage, the decrease in exhaustion of stream sand, tending to condition and manageability issues, it is a significant commitment in making green concrete.

PYROMET 600

Alloy Digest ◽  
1969 ◽  
Vol 18 (12) ◽  
Keyword(s):  
Base Alloy ◽  
High Strength ◽  
Heat Treating ◽  
Nuclear Industry ◽  
Temperature Performance ◽  
Resistance To Oxidation ◽  
Technology Corporation ◽  
Carpenter Technology Corporation ◽  
Nickel Base

Abstract Pyromet 600 is a corrosion-resisting nickel-base alloy, having a very desirable combination of high strength and workability, both hot and cold. It has high strength and resistance to oxidation at high temperatures. It is designed to meet the highest quality of the nuclear industry. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-149. Producer or source: Carpenter Technology Corporation.

Pengaruh Kompetensi Coder terhadap Keakuratan dan Ketepatan Pengkodean Menggunakan ICD 10 di Rumah Sakit X Pekanbaru Tahun 2016

2018 ◽  
Vol 1 (1) ◽  
pp. 31-43
Author(s):  
Nur Maimun ◽  
Jihan Natassa ◽  
Wen Via Trisna ◽  
Yeye Supriatin
Keyword(s):  
Medical Record ◽  
Human Error ◽  
Medical Personnel ◽  
Quality Of Data ◽  
Accuracy And Precision ◽  
Result Show ◽  
Study Implementation ◽  
Icd 10 ◽  
The Cost

The accuracy in administering the diagnosis code was the important matter for medical recorder, quality of data was the most important thing for health information management of medical recorder. This study aims to know the coder competency for accuracy and precision of using ICD 10 at X Hospital in Pekanbaru. This study was a qualitative method with case study implementation from five informan. The result show that medical personnel (doctor) have never received a training about coding, doctors writing that hard and difficult to read, failure for making diagnoses code or procedures, doctor used an usual abbreviations that are not standard, theres still an officer who are not understand about the nomenclature and mastering anatomy phatology, facilities and infrastructure were supported for accuracy and precision of the existing code. The errors of coding always happen because there is a human error. The accuracy and precision in coding very influence against the cost of INA CBGs, medical and the committee did most of the work in the case of severity level III, while medical record had a role in monitoring or evaluation of coding implementation. If there are resumes that is not clearly case mix team check file needed medical record the result the diagnoses or coding for conformity. Keywords: coder competency, accuracy and precision of coding, ICD 10

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