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Effect of Fe-Cr Coating on the Fe-Ga Alloy Functional Properties 铁-铬涂层对铁-镓合金功能特性的影响
Defect and Diffusion Forum Pub Date : 2023-12-12 DOI: 10.4028/p-mbK4cO
V. Palacheva, V. Cheverikin, D.G. Chubov, Mikhail Yu. Zadorozhnyy, Yulia S. Zhukova, A. Sheveyko, Alexey N. Solonin, Philipp V. Kiryukhantsev-Korneev, I.S. Golovin
{"title":"Effect of Fe-Cr Coating on the Fe-Ga Alloy Functional Properties","authors":"V. Palacheva, V. Cheverikin, D.G. Chubov, Mikhail Yu. Zadorozhnyy, Yulia S. Zhukova, A. Sheveyko, Alexey N. Solonin, Philipp V. Kiryukhantsev-Korneev, I.S. Golovin","doi":"10.4028/p-mbK4cO","DOIUrl":"https://doi.org/10.4028/p-mbK4cO","url":null,"abstract":"Magnetron sputtering with a chromium-containing Fe-19at.%Cr alloy is used to improve the corrosion resistance of Fe-20at.%Ga alloy. The structure of the 2 μm coated layer and distribution of the elements (Fe, Cr, and Ga) are investigated. The bcc phase (A2 structure) is observed in the sputtered sample by XRD analysis. The corrosion resistance in 3.5%NaCl solution increases 14 times in the sample with 2 μm Fe-Cr coated layer. At the same time, the magnetron sputtering leads to a 10% decrease in magnetostriction and a 20% decrease in damping. This difference is explained by schemes of loading during magnetostriction and damping tests.","PeriodicalId":11306,"journal":{"name":"Defect and Diffusion Forum","volume":"31 S2","pages":"171 - 178"},"PeriodicalIF":0.0,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139009947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Development of a 3D Computer Simulation Model Using C++ Methods 用c++方法开发三维计算机仿真模型
Defect and Diffusion Forum Pub Date : 2023-08-22 DOI: 10.4028/p-5iWtnL
V. Pasternak, A. Ruban, V. Shvedun, Julia Veretennikova
{"title":"Development of a 3D Computer Simulation Model Using C++ Methods","authors":"V. Pasternak, A. Ruban, V. Shvedun, Julia Veretennikova","doi":"10.4028/p-5iWtnL","DOIUrl":"https://doi.org/10.4028/p-5iWtnL","url":null,"abstract":"The article presents modelling of spherical elements based on the developed computer model. We recorded the main combinations of spherical particles during filling, which are formed in the hopper. It was found that the most likely combination that occurs when modelling spherical elements consists of three balls. It should be noted that in the cross-section of such a combination passing through the center of the balls, an equilateral triangle is formed. And in the cross-section of the structure, which consists of four spherical balls, a rhombus is formed, if you connect the centers of these spherical elements. It is worth noting that from this formed combination of spherical elements, it can be seen that the rhombus forms two smaller equilateral triangles that fix the process of pushing the spherical balls apart. In turn, the process of pushing spherical elements apart made it possible to fix the contact between spherical elements, as well as to state the stable position of each (individual) particle. This paper also presents the main fragments of encoding the source text of a 3D computer model for modelling spherical elements, which made it possible to optimize the model parameters. It was found that from the obtained data on the distribution of coordination numbers for different volume fillings of spherical elements, it follows that the largest filling was 72 %, which corresponds to the state when 112 lobules have an average coordination number of 3,92.","PeriodicalId":11306,"journal":{"name":"Defect and Diffusion Forum","volume":"428 1","pages":"57 - 66"},"PeriodicalIF":0.0,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47757496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Effect of Silica Powder Based on Methyltrimethoxysilane and Silica Sand as a Hydrophobic Material 基于甲基三甲氧基硅烷的二氧化硅粉末和硅砂作为疏水材料的效果
Defect and Diffusion Forum Pub Date : 2023-08-22 DOI: 10.4028/p-agJQ6S
Yuniar Mughayyirah, L. Silvia, M. Zainuri
{"title":"The Effect of Silica Powder Based on Methyltrimethoxysilane and Silica Sand as a Hydrophobic Material","authors":"Yuniar Mughayyirah, L. Silvia, M. Zainuri","doi":"10.4028/p-agJQ6S","DOIUrl":"https://doi.org/10.4028/p-agJQ6S","url":null,"abstract":"In this research, a hydrophobic surface has been successfully created using a mixture of silica sand and methyltrimethoxysilane (MTMS) precursor. This research aims to determine the effect of varying the volume of MTMS on the hydrophobic surface. The MTMS as silica precursor was synthesized with Stöber method. The variation used is the volume of the MTMS precursor, while the silica from silica sand is made constant. The volume variation of the MTMS precursor is 9.5 ml, 19 ml, 28.5 ml and 38 ml. The MTMS/SiO2 composite which has been synthesized then get mixed with steel ship paint and coated on the steel plate surface as a topcoat. The MTMS/SiO2 composite was further characterized by X-ray Powder Diffraction (XRD), Scanning Electron Microscopy (SEM), Water Contact Angle (WCA), and Atomic Force Microscope (AFM) which were employed to investigate crystal structure, morphology of particle, hydrophobicity on a surface, and topography of the three-dimensional surface layer respectively. The type of liquid used in the WCA characterization is seawater. XRD characterization results show that silica sand has a quartz phase, MTMS has an amorphous phase and MTMS/SiO2 composite tends to have an amorphous phase. SEM characterization show that the particle size of silica sand that has been mixed with MTMS is around 8 – 20 μm. WCA characterization show that the addition of silica powder on the topcoat increase surface roughness and WCA, so that the steel plate surface has good hydrophobic properties. The highest water contact angle obtained in this research was 109o by seawater.","PeriodicalId":11306,"journal":{"name":"Defect and Diffusion Forum","volume":"428 1","pages":"75 - 80"},"PeriodicalIF":0.0,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43435662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of In-Plane Stress on the Frictional Behavior of Thin Layers 面内应力对薄层摩擦行为的影响
Defect and Diffusion Forum Pub Date : 2023-08-22 DOI: 10.4028/p-n2JBjr
N. Menga, G. Carbone
{"title":"Effect of In-Plane Stress on the Frictional Behavior of Thin Layers","authors":"N. Menga, G. Carbone","doi":"10.4028/p-n2JBjr","DOIUrl":"https://doi.org/10.4028/p-n2JBjr","url":null,"abstract":"Usually, contact mechanics focus on semi-infinite solids, so that any interaction between normal and in-plane deformation is commonly disregarded. However, when dealing with layers of finite thickness, this assumption is no longer valid, and the specific geometry of the contact pair plays a key role in determining the normal-tangential coupling. In this study, we focus on the exemplar case of a thin deformable layer in frictional sliding contact with a rough profile, where the interplay between tangential friction and normal pressure may lead to significantly different contact behavior compared to the uncoupled case, both in terms of contact area size and frictional response.","PeriodicalId":11306,"journal":{"name":"Defect and Diffusion Forum","volume":"428 1","pages":"17 - 23"},"PeriodicalIF":0.0,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46145775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Unbound Excitonic Properties in a Multilayered Quantum Dot under Hydrostatic Pressure and Temperature 静水压力和温度下多层量子点的非束缚激子性质
Defect and Diffusion Forum Pub Date : 2023-08-22 DOI: 10.4028/p-ufLk2M
M. Hbibi, O. Mommadi, S. Chouef, R. Boussetta, M. Chnafi, L. Belamkadem, A. El Moussaouy, C. M. Duque, C. A. Duque, F. Falyouni
{"title":"Unbound Excitonic Properties in a Multilayered Quantum Dot under Hydrostatic Pressure and Temperature","authors":"M. Hbibi, O. Mommadi, S. Chouef, R. Boussetta, M. Chnafi, L. Belamkadem, A. El Moussaouy, C. M. Duque, C. A. Duque, F. Falyouni","doi":"10.4028/p-ufLk2M","DOIUrl":"https://doi.org/10.4028/p-ufLk2M","url":null,"abstract":"Taking into account the effective mass approximation and the two-band model, we have studied the combined effects of hydrostatic pressure and temperature on the unbound excitonic properties of a cylinder-shaped quantum dot. The two finite confinement potentials along the radial direction and one finite confinement potential along the axial direction have been considered. We have calculated the electronic energy with and without light hole effect as a function of the core radius, hydrostatic pressure and temperature. The numerical results show that the effect of the confinement potential is dominant over the effect of the hydrostatic pressure and the temperature. Also, the light hole effect on the electronic properties has a significant influence mainly under the external perturbation","PeriodicalId":11306,"journal":{"name":"Defect and Diffusion Forum","volume":"428 1","pages":"105 - 115"},"PeriodicalIF":0.0,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42956950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Viscoelastic Adhesion and Friction in Sliding Contacts 滑动接触中的粘弹性粘附与摩擦
Defect and Diffusion Forum Pub Date : 2023-08-22 DOI: 10.4028/p-840lJl
G. Carbone, N. Menga
{"title":"Viscoelastic Adhesion and Friction in Sliding Contacts","authors":"G. Carbone, N. Menga","doi":"10.4028/p-840lJl","DOIUrl":"https://doi.org/10.4028/p-840lJl","url":null,"abstract":"We present our recent study on adhesive contacts of viscoelastic materials sliding against rigid substrates. Ultimately, the theory addresses the combined effect of viscoelasticity and adhesion in sliding contacts, with specific focus on the sliding frictional behavior. Compared to the adhesiveless case, we show that a significant enhancement of hysteretic friction occurs in the presence of adhesion, in agreement with long-standing experimental evidence. The presented formulation allows to investigate the effect of sliding velocities ranging from extremely slow to very high, thus taking into for local viscoelasticity, occurring at the edges of the contacts (crack tips), and bulk viscoelasticity, occurring in the bulk deformable material.","PeriodicalId":11306,"journal":{"name":"Defect and Diffusion Forum","volume":"428 1","pages":"3 - 8"},"PeriodicalIF":0.0,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49109878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Quantum Technologies, Defect Identification and Materials Research 量子技术、缺陷识别和材料研究
Defect and Diffusion Forum Pub Date : 2023-08-22 DOI: 10.4028/b-pxan60
Steven Y. Liang, V. Andronov, Y. Otrosh, Abdelaaziz El Moussaouy, Agustinus Agung Nugroho, Chafic-Touma Salame
{"title":"Quantum Technologies, Defect Identification and Materials Research","authors":"Steven Y. Liang, V. Andronov, Y. Otrosh, Abdelaaziz El Moussaouy, Agustinus Agung Nugroho, Chafic-Touma Salame","doi":"10.4028/b-pxan60","DOIUrl":"https://doi.org/10.4028/b-pxan60","url":null,"abstract":"","PeriodicalId":11306,"journal":{"name":"Defect and Diffusion Forum","volume":"104 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139349529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Hierarchical Structure of SiO2 by In Situ Modification Combining Quartz Sand and Methyltrimethoxysilane 石英砂与甲基三甲氧基硅烷原位改性SiO2的层次结构研究
Defect and Diffusion Forum Pub Date : 2023-08-22 DOI: 10.4028/p-2jVrNK
L. Silvia, Lana Awathifi, Yuniar Mughayyirah, M. Zainuri, D. Darminto
{"title":"Hierarchical Structure of SiO2 by In Situ Modification Combining Quartz Sand and Methyltrimethoxysilane","authors":"L. Silvia, Lana Awathifi, Yuniar Mughayyirah, M. Zainuri, D. Darminto","doi":"10.4028/p-2jVrNK","DOIUrl":"https://doi.org/10.4028/p-2jVrNK","url":null,"abstract":"SiO2 were successfully synthesized by sol–gel process via in-situ modification. The SiO2 consists of two kinds of co-precursor namely raw material from quartz sand and methyltrimethoxysilane (MTMS) as main SiO2 source. By introducing SiO2 with different sizes of particle micro-submicron scale, it was suggested to construct hierarchical structure. The sample was characterized by X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), and Atomic Force Microscope (AFM) to analyze crystal structure, morphology of particles, and surface roughness of the samples. In this research, SiO2 co-precursor from quartz sand were extraction and synthesis to be SiO2 quartz (SQ) phase and SiO2 amorphous (SA) phase respectively which is combine with SiO2 based MTMS by sol–gel process via in-situ modification. Based on the results, it can be concluded that SiO2 with high purity levels maintains its crystal structure even after in-situ modification, resulting in an increase in particle size to approximately 12-20 μm. SEM images showed that particle was irregular shape due to agglomeration which is SiO2 based quartz sand stick by SiO2 based MTMS. AFM showed the surface roughness of MTMS/SQ have a larger roughness than MTMS/SA with Sa 3.3 ± 0.8 nm and Sq 5.0 ± 1.0 nm. The formation of hierarchical structure layers based on SiO2 has a promising potential for wide applications in various fields such as hydrophobic surface.","PeriodicalId":11306,"journal":{"name":"Defect and Diffusion Forum","volume":"428 1","pages":"69 - 74"},"PeriodicalIF":0.0,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42255744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesization and Photocatalytic Activity Evaluation of Float-Type g-C3N4 Microtubes 漂浮型g-C3N4微管的合成及其光催化活性评价
Defect and Diffusion Forum Pub Date : 2023-08-22 DOI: 10.4028/p-XnUv8Q
K. Nanakida, Dang-Trang Nguyen, K. Taguchi
{"title":"Synthesization and Photocatalytic Activity Evaluation of Float-Type g-C3N4 Microtubes","authors":"K. Nanakida, Dang-Trang Nguyen, K. Taguchi","doi":"10.4028/p-XnUv8Q","DOIUrl":"https://doi.org/10.4028/p-XnUv8Q","url":null,"abstract":"Float-type g-C3N4 microtubes were created by hydrothermal method and calcination using g-C3N4. Substances after hydrothermal synthesis and float-type g-C3N4 microtubes were investigated by XRD and SEM. The photocatalytic activity of float-type g-C3N4 microtubes was evaluated by methylene blue decomposition. According to these results, the substance, such as a needle, was found to have the same crystal structure as g-C3N4. In addition, it was confirmed that the needle-like substance was hollow inside, according to the SEM result. This substance can float on water. Therefore, Float type g-C3N4 microtubes can receive more light, and the decomposition rate has increased compared to g-C3N4.","PeriodicalId":11306,"journal":{"name":"Defect and Diffusion Forum","volume":"428 1","pages":"119 - 123"},"PeriodicalIF":0.0,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47539135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Computer Simulation Modeling of an Inhomogeneous Medium with Ellipse-Shaped Irregular Elements 含椭圆异形元的非均匀介质的计算机模拟
Defect and Diffusion Forum Pub Date : 2023-08-22 DOI: 10.4028/p-lp6Pjp
V. Pasternak, A. Ruban, Vita Hurkalenko, A. Zhyhlo
{"title":"Computer Simulation Modeling of an Inhomogeneous Medium with Ellipse-Shaped Irregular Elements","authors":"V. Pasternak, A. Ruban, Vita Hurkalenko, A. Zhyhlo","doi":"10.4028/p-lp6Pjp","DOIUrl":"https://doi.org/10.4028/p-lp6Pjp","url":null,"abstract":"The article substantiates the main possibilities of filling with irregular bodies, and provides a visual analysis of the parameters formed as a result of structures. It was found out that the form factor acts as the main indicator of the characteristic parameter of changes in the structure and all other parameters of an inhomogeneous medium. It was also found out that when filling a container with irregular ellipsoid elements, the conditions for non-opening (one-way contact) must be met. The obtained calculations of the form factor show the minimum value of the average coordination number of an inhomogeneous medium. This allows us to assert and predict reliable modelling results (± 2-3%). It is also important that the developed simulation model for modelling an inhomogeneous medium using an irregular (ellipsoid) shape of elements can significantly reduce the time spent on conducting field experiments, as well as simulate irregular elements with different shape factors.","PeriodicalId":11306,"journal":{"name":"Defect and Diffusion Forum","volume":"20 1","pages":"37 - 45"},"PeriodicalIF":0.0,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70641848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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