ELECTROCHEMICAL TREATMENT OF PARTS OBTAINED BY SELECTIVE LASER FUSION

2021 ◽  
pp. 3-12
Author(s):  
A.A. Nikiforov ◽  
◽  
S.A. Demin ◽  
K.M. Khmeleva ◽  
◽  
...  
Keyword(s):  
Surface Roughness ◽  
Industrial Production ◽  
Electrochemical Treatment ◽  
Additive Technologies ◽  
Laser Fusion ◽  
Layer By Layer ◽  
Labor Intensity ◽  
Additive Technology ◽  
Selective Laser Fusion

The use of additive technologies for the production of parts is one of the main trends in recent years in the field of industrial production. Application of the technology of «layer-by-layer growing» provides savings in materials, a significant reduction in labor intensity, and allows you to create parts of any complexity and configuration. To reduce the surface roughness values of parts manufactured using additive technology, the authors proposed a method of electrochemical treatment in acid electrolytes, which makes it possible to achieve a decrease in surface roughness values by more than 5 times compared to the original one, and to process parts of any complexity and configuration.

ALGORITHM FOR CALCULATING THE SURFACE ROUGHNESS PARAMETERS OF A PART MADE USING ADDITIVE TECHNOLOGY

2021 ◽  
pp. 12-15
Author(s):  
V. F. Bezyazychnyj ◽  
D. V. Fedoseev
Keyword(s):  
Surface Roughness ◽  
Aircraft Engine ◽  
Laser Fusion ◽  
Roughness Parameters ◽  
Additive Technology ◽  
Calculation Algorithm ◽  
Surface Roughness Parameters ◽  
Engine Industry ◽  
Selective Laser Fusion

The calculated dependences for determining the surface roughness parameters of a part made by selective laser fusion from materials that are certified and widely used in the aircraft engine industry are presented. A comparison of the values of the height parameters of the roughness obtained by calculation and on the basis of the experiment is presented. On the basis of the presented dependencies, a calculation algorithm is developed, which is the basis of the software for calculating on a computer.

scholarly journals Analysis of surface roughness parameters in billets obtained by method of additive technologies

2019 ◽  
Vol 2019 (12) ◽  
pp. 3-11
Author(s):  
Vyacheslav Bezyazychnyy ◽  
Denis Fedoseev
Keyword(s):  
Surface Roughness ◽  
Tilt Angle ◽  
Roughness Parameter ◽  
Laser Sintering ◽  
Additive Technologies ◽  
Roughness Parameters ◽  
Additive Technology ◽  
Surface Roughness Parameters

The investigation results of surface roughness parameters in billets obtained by the method of additive technology (laser sintering) are presented. There are obtained dependences of roughness parameter Ra upon a surface tilt angle regarding a plane of billet formation and an angle of a surface turn with regard to a cutter motion.

STUDY OF THE PROPERTIES A FRAGMENT OF THE HYDRAULIC CIRCUIT OF THE SPACECRAFT, OBTAINED BY MEANS OF ADDITIVE TECHNOLOGIES

2020 ◽  
pp. 11-19
Author(s):  
I. E. Mal’tzev ◽  
A. A. Basov ◽  
M. A. Borisov ◽  
A. V. Bystrov
Keyword(s):  
Selective Laser Melting ◽  
Experimental Work ◽  
Heat Exchangers ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Additive Technologies ◽  
Laser Fusion ◽  
Layer By Layer ◽  
Laser Melting ◽  
Hydraulic Circuits

The article discusses the course and results of experimental work on the initial study of the possibility of using one of the varieties of additive technologies – the method of layer-by-layer selective laser melting (SLM) in the manufacture of elements of heat exchangers and hydraulic circuits of spacecraft. Traditional manufacturing techniques for hydro-control elements and spacecraft heat exchangers are based on machining and high-temperature vacuum soldering, leading to a long cycle and high manufacturing costs. As an alternative, the method of layer-by-layer selective laser melting can be considered as a manufacturing method using a three-dimensional model of the product and not requiring additional equipment. This method is based on sequential layer-by-layer fusion of a metal powder with previous fused product layers under the action of a laser beam forming a local region of liquid melt. The article describes experimental work to assess the possibility of using the selective laser melting method. Assessed weld-ability of a sample made by selective laser fusion technology with tips made by traditional technology. Directions for testing the method of selective laser sintering on real structures of heat exchanging units of spacecraft have been determined. A technique is proposed and the results of a study of a sample synthesized by selective laser sintering are presented. Based on the results obtained, an analysis is made of the prospects for using this method in the production of elements of hydraulic circuits and heat exchange units of spacecraft.

Additive technology to create a tool for electroerosive processing

2021 ◽  
pp. 138-144
Author(s):  
N.S. Potashnikova ◽  
V.P. Smolentsev ◽  
M.G. Potashnikov
Keyword(s):  
Aerospace Industry ◽  
Russian Patent ◽  
Additive Technologies ◽  
Small Scale ◽  
Flexible Structure ◽  
Layer By Layer ◽  
Additive Technology ◽  
Metal Parts ◽  
New Methods ◽  
Metal Body

The paper considers new methods and tools for combined electroabrasive finishing of metal parts, and shows the advantages of such a tool over traditional methods of finishing shaping the surfaces of labor-intensive products made of difficult-to-process alloys. The possibilities of layer-by-layer application of materials using additive technology to reduce labor intensity and cost for combined processing of tools with layers of abrasive on the periphery of a metal body obtained from a low-melting alloy by the additive method are considered. The possibility of accelerated production of tools using this technology, which does not require significant costs for editing and sharpening for specific parts, is shown, which reduces the production time of technological equipment when launching new generations of products, primarily in the aerospace industry of mechanical engineering. The new method and design of the tool are protected by a Russian patent. Experimental operation of wheels made using additive technologies has shown that the use of such a tool in single and small-scale flexible structure production significantly reduces the complexity of manufacturing parts for finishing operations.

scholarly journals Modeling the Layer-by-Layer Growth of HKUST-1 Metal-Organic Framework Thin Films

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1631
Author(s):  
Qiang Zhang ◽  
Yohanes Pramudya ◽  
Wolfgang Wenzel ◽  
Christof Wöll
Keyword(s):  
Thin Films ◽  
Surface Roughness ◽  
Deposition Rate ◽  
Layer Growth ◽  
Coarse Grained ◽  
Structural Defects ◽  
Effect Of Temperature ◽  
Layer By Layer ◽  
Reactant Concentration ◽  
Metal Organic

Metal organic frameworks have emerged as an important new class of materials with many applications, such as sensing, gas separation, drug delivery. In many cases, their performance is limited by structural defects, including vacancies and domain boundaries. In the case of MOF thin films, surface roughness can also have a pronounced influence on MOF-based device properties. Presently, there is little systematic knowledge about optimal growth conditions with regard to optimal morphologies for specific applications. In this work, we simulate the layer-by-layer (LbL) growth of the HKUST-1 MOF as a function of temperature and reactant concentration using a coarse-grained model that permits detailed insights into the growth mechanism. This model helps to understand the morphological features of HKUST-1 grown under different conditions and can be used to predict and optimize the temperature for the purpose of controlling the crystal quality and yield. It was found that reactant concentration affects the mass deposition rate, while its effect on the crystallinity of the generated HKUST-1 film is less pronounced. In addition, the effect of temperature on the surface roughness of the film can be divided into three regimes. Temperatures in the range from 10 to 129 °C allow better control of surface roughness and film thickness, while film growth in the range of 129 to 182 °C is characterized by a lower mass deposition rate per cycle and rougher surfaces. Finally, for T larger than 182 °C, the film grows slower, but in a smooth fashion. Furthermore, the potential effect of temperature on the crystallinity of LbL-grown HKUST-1 was quantified. To obtain high crystallinity, the operating temperature should preferably not exceed 57 °C, with an optimum around 28 °C, which agrees with experimental observations.

A benchtop capillary flow layer-by-layer (CF-LbL) platform for rapid assembly and screening of biodegradable nanolayered films

Lab on a Chip ◽  
2016 ◽  
Vol 16 (23) ◽  
pp. 4601-4611 ◽  
Author(s):  
Ziye Dong ◽  
Ling Tang ◽  
Caroline C. Ahrens ◽  
Zhenya Ding ◽  
Vi Cao ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Film Thickness ◽  
Capillary Flow ◽  
Layer By Layer

We report a benchtop platform to systematically study film thickness, surface roughness, biocompatibility and degradation of a series of biodegradable nanolayered films.

scholarly journals 3D print additive technology as a form of textile material substitute in clothing design – interdisciplinary approach in designing corsets and fashion accessories

2018 ◽  
Vol 69 (03) ◽  
pp. 190-196 ◽  
Author(s):  
KONČIĆ JASMINKA ◽  
ŠČAPEC JOSIPA
Keyword(s):  
Contemporary Art ◽  
Interdisciplinary Approach ◽  
Additive Technologies ◽  
Textile Material ◽  
Fashion Design ◽  
Additive Technology ◽  
3D Print ◽  
Clothing Design ◽  
Design Options ◽  
Interdisciplinary Process

This research paper enquires into the application of 3D print additive technology in fashion design. The research aims to find the design options for garments by substituting the textile material with new technological solutions. The focus of the paper is the interdisciplinary research of innovative corset and fashion accessories designs made using 3D print additive technologies. The main focus of the work is the interdisciplinary process of creating clothes ranging from preliminary sketches to prototypes within three different areas: contemporary art, fashion design and additive technology.

Detection of Interfaces States Correlated with Layer-by-Layer Oxidation on Si(100)

1999 ◽  
Vol 592 ◽  
Author(s):  
T. Hattori ◽  
H. Nohira ◽  
Y Teramoto ◽  
N. Watanabe
Keyword(s):  
Surface Roughness ◽  
Oxide Film ◽  
Film Thickness ◽  
Interface State ◽  
State Density ◽  
Layer By Layer ◽  
Oxide Film Thickness ◽  
Maximum Value ◽  
State Densities ◽  
Atomically Flat

ABSTRACTThe interface state densities near the midgap were measured with the progress of oxidation of atomically flat Si(100) surface. It was found that the interface state distribution in Si bandgap changes periodically with the progress of oxidation. Namely, the interface-state density near the midgap of Si exhibits drastic decrease at oxide film thickness where the surface roughness of oxide film takes its minimum value, while that does not exhibit decrease at the oxide film thickness where the surface roughness takes its maximum value. In order to minimize interface state densities the oxide film thickness should be precisely controlled to within an accuracy of 0.02 nm.

scholarly journals Surface Roughness Investigation of Poly-Jet 3D Printing

Mathematics ◽  
2020 ◽  
Vol 8 (10) ◽  
pp. 1758
Author(s):  
Nectarios Vidakis ◽  
Markos Petousis ◽  
Nikolaos Vaxevanidis ◽  
John Kechagias
Keyword(s):  
Surface Roughness ◽  
3D Printing ◽  
Surface Quality ◽  
Back Propagation ◽  
Physical Models ◽  
Layer By Layer ◽  
Linear Regression Models ◽  
Feed Forward Back Propagation ◽  
The Impact

An experimental investigation of the surface quality of the Poly-Jet 3D printing (PJ-3DP) process is presented. PJ-3DP is an additive manufacturing process, which uses jetted photopolymer droplets, which are immediately cured with ultraviolet lamps, to build physical models, layer-by-layer. This method is fast and accurate due to the mechanism it uses for the deposition of layers as well as the 16 microns of layer thickness used. Τo characterize the surface quality of PJ-3DP printed parts, an experiment was designed and the results were analyzed to identify the impact of the deposition angle and blade mechanism motion onto the surface roughness. First, linear regression models were extracted for the prediction of surface quality parameters, such as the average surface roughness (Ra) and the total height of the profile (Rt) in the X and Y directions. Then, a Feed Forward Back Propagation Neural Network (FFBP-NN) was proposed for increasing the prediction performance of the surface roughness parameters Ra and Rt. These two models were compared with the reported ones in the literature; it was revealed that both performed better, leading to more accurate surface roughness predictions, whilst the NN model resulted in the best predictions, in particular for the Ra parameter.

Epitaxial Iridium Growth on Strontium Titanate

2000 ◽  
Vol 648 ◽  
Author(s):  
Z. Dai ◽  
A.P. Li ◽  
C. Bednarski ◽  
L. I. McCann ◽  
B. Golding
Keyword(s):  
Surface Roughness ◽  
Substrate Surface ◽  
Surface Preparation ◽  
Electron Beam Evaporation ◽  
Layer By Layer ◽  
Epitaxial Relationship ◽  
Ion Channeling ◽  
Substrate Temperatures ◽  
Subsequent Layer

AbstractEpitaxial (100) iridium films have been grown on (100) SrTiO3 (STO) substrates by electron beam evaporation. The epitaxial relationship between the iridium film and STO substrate was determined to be Ir(001)[100]//STO(001)[100]. A systematic study of the role of STO substrate surface preparation, Ir thickness, and substrate temperature on Ir film crystallinity and morpholo- gy has been performed. The best Ir films typically have small Ir(200) XRD linewidths < 0.3 °, surface roughness of 0.2 nm, and low ion channeling yields, χmin≤ 4%, when deposited at 800 °C. Films generally become smoother with better crystallinity when the film thickness approaches 300 nm. A growth mode with initial island formation and subsequent layer-by-layer appears to take place at higher substrate temperatures, whereas at lower temperatures the film grows in a 3D mode.

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