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Photopolymer-metal Composites Based on Metal Foil Deposition on Additive Manufactured Substrates: An Overview 基于添加剂制造基底上金属箔沉积的光聚合物金属复合材料:概述
Pub Date : 2023-12-21 DOI: 10.30564/jmmr.v7i1.5962
S. K. G
Photopolymer materials are a type of polymer material that can undergo chemical reactions when exposed to light of a specific wavelength or intensity. Liquid photopolymers are used in applications such as 3D printing, where they are deposited layer by layer and cured by exposure to light. Solid photopolymers, also known as photoresists, are used in applications such as lithography and microfabrication, where they are applied as a thin film and selectively exposed to light to create a pattern. The properties of photopolymer materials, such as mechanical strength, thermal stability, and chemical resistance, can be tailored by adjusting the monomer type, photo initiator type, and processing parameters such as the exposure time and intensity. Overall, photopolymer materials are a versatile and widely used type of polymer material that can be tailored for specific applications through the choice of monomer, photo initiator, and processing parameters. Photopolymer-metal composites based on metal foil deposition on additive manufactured substrates are a technique for creating composite materials with a combination of metal and polymer properties. This approach involves the deposition of a thin layer of metal foil onto a 3D printed polymer substrate, which is then cured using photopolymerization to create a composite material with unique properties.
光聚合物材料是一种聚合物材料,在特定波长或强度的光线照射下会发生化学反应。液态光聚合物可用于 3D 打印等应用中,通过逐层沉积和光照固化。固态光聚合物也称为光致抗蚀剂,用于光刻和微细加工等应用中,在这些应用中,光聚合物被涂成薄膜,并选择性地暴露在光线下以形成图案。光聚合物材料的机械强度、热稳定性和耐化学性等特性可以通过调整单体类型、光引发剂类型以及曝光时间和强度等加工参数来定制。总之,光聚合物材料是一种用途广泛的聚合物材料,可通过选择单体、光引发剂和加工参数,针对特定应用进行定制。基于金属箔沉积在添加剂制造基底上的光聚合物-金属复合材料是一种用于制造兼具金属和聚合物特性的复合材料的技术。这种方法是在三维打印聚合物基底上沉积一薄层金属箔,然后使用光聚合固化,从而制造出具有独特性能的复合材料。
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引用次数: 0
Significant Difficulties in Achieving Equal Channel Angular Pressing in Aluminum Metal Matrix Composites 铝金属基复合材料中实现等通道角挤压的重大困难
Pub Date : 2023-08-31 DOI: 10.30564/jmmr.v6i2.5877
Sagar K G
The technique known as Equal Channel Angular Pressing (ECAP) has gained prominence as a transformational method for improving the mechanical characteristics of metals and alloys by subjecting them to intense plastic deformation. This study explores the significant difficulties that arise when using Equal Channel Angular Pressing (ECAP) on Aluminium 2024-Beryl Metal Matrix Composites (2024-BMMCs), providing a detailed analysis of the complex interaction between the reinforcement particles and the aluminium matrix. This work aims to provide a thorough examination of the challenges, root causes, and possible approaches to address the issue of producing consistent deformation in 2024-BMMCs using ECAP. By doing so, this research contributes to a better understanding of the intricate nature of this process.
该技术被称为等通道角压(ECAP)已获得突出的转变方法,以改善金属和合金的机械特性,使其受到强烈的塑性变形。本研究探讨了在铝2024-绿柱石金属基复合材料(2024-BMMCs)上使用等通道角压(ECAP)时出现的重大困难,详细分析了增强颗粒与铝基体之间复杂的相互作用。这项工作的目的是对2024年使用ECAP解决bmmc产生一致变形的挑战、根本原因和可能的方法进行全面的研究。通过这样做,这项研究有助于更好地理解这一过程的复杂本质。
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引用次数: 0
Retracted: Combined Effect of Thermal Shock and Hot Corrosion on the Failure of Yttria Stabilized Zirconia Thermal Barrier Coatings 缩回:热冲击和热腐蚀对氧化钇稳定氧化锆热障涂层失效的综合影响
Pub Date : 2023-07-10 DOI: 10.30564/jmmr.v6i2.5838
Changhai Zhou, Xuewei Li, R. Pan
Owing to the authors' ignorance, a SEM picture (fig.3(d) in this paper) has been used in another paper (Fig.3(b) in a Chinese Journal). After carefully thinking, the authors decided to withdraw the paper with pity. This decision has been approved by both Editorial Office of JMMR and all authors. We apologize for the inconvenience may caused to readers.   Refers to original article: https://doi.org/10.30564/jmmr.v1i1.307   Date of Retraction: July 10, 2023
由于作者的疏忽,这篇文章的SEM图(图3(d))被另一篇中国期刊的文章(图3(b))使用。经过深思熟虑,作者们决定遗憾地撤回这篇论文。这一决定得到了《JMMR》编辑部和所有作者的同意。对于给读者带来的不便,我们深表歉意。引用原文:https://doi.org/10.30564/jmmr.v1i1.307撤稿日期:2023年7月10日
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引用次数: 0
Impact of Cooling Rate on the Results of Vibration Treatment of the Aluminum Casting 冷却速率对铝铸件振动处理效果的影响
Pub Date : 2023-06-26 DOI: 10.30564/jmmr.v6i1.5640
A. Borisov, A. Nuradynov, V. U. Sheigam
The effect of vibration (50 Hz) on the formation of aluminum castings of 99.5% purity at various cooling rates was studied. It was found that the presence of vibration leads to an increase in the cooling rate of the castings. It was found that the higher the speed without vibration, the stronger the effect of increasing the speed when vibration was applied. Apparently, this effect is associated with additional mixing of the melt by free-floating crystals.
研究了在不同冷却速率下,振动(50 Hz)对99.5%纯度铝铸件成形的影响。结果表明,振动的存在使铸件冷却速度加快。结果表明,无振动时转速越高,有振动时提高转速的效果越强。显然,这种效应与自由漂浮的晶体对熔体的额外混合有关。
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引用次数: 0
Analyzing the Effects of Tool Holder Stiffness on Chatter Vibration Reduction in Turning 刀柄刚度对车削颤振减振的影响分析
Pub Date : 2023-03-01 DOI: 10.30564/jmmr.v6i1.5428
Kadir Gok, E. Turkes, Ö. Karakaş, A. Gök
This paper investigates the effects of tool holder materials on chatter vibration in turning operations. The study uses a complex dynamic turning model with two degrees of freedom for the orthogonal cutting system. Tool holders made from different materials, including Al 5083, Al 6082, Al 7012, and a standard 4140 material, were subjected to chatter vibration to investigate their process damping capabilities. The study found that the standard tool holder 4140 allows for higher stable depths of cut and produces similar process damping values compared to the other tool holders. Finite element analyses (FEA) were performed to verify the experimental results, and the modal and FEA analyses produced very similar results. The study concludes that future research should investigate the effects of tool holders made from high alloy steel alloys on process damping. Overall, this paper provides important insights into the effects of tool holder materials on chatter vibration and process damping in turning operations, which can help in the design of more efficient and effective cutting systems.
研究了车削加工中刀柄材料对颤振的影响。研究正交切削系统采用复杂的二自由度动态车削模型。采用不同材料(包括Al 5083、Al 6082、Al 7012和标准4140材料)制成的刀柄进行颤振试验,以研究其工艺阻尼能力。研究发现,与其他刀架相比,标准刀架4140允许更高的稳定切割深度,并产生类似的过程阻尼值。对试验结果进行了有限元分析,模态分析和有限元分析结果非常相似。研究结论认为,未来的研究应探讨高合金钢合金刀柄对工艺阻尼的影响。总体而言,本文提供了刀柄材料对车削操作中颤振振动和过程阻尼的影响的重要见解,这可以帮助设计更高效和有效的切削系统。
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引用次数: 0
Investigation of Erosion Corrosion Caused by Drinking Water in the Faucet with Computational Fluid Dynamics 饮水龙头冲蚀腐蚀的计算流体力学研究
Pub Date : 2023-01-12 DOI: 10.30564/jmmr.v6i1.5217
Kadir Gok, H. Ada, Mehmet Erdem, A. Gök, K. Topçuoğlu, M. Alkan
In this study, the reason for erosion-corrosion of drinking or mains water in the faucet was investigated by computational fluid dynamics. Pipes used in homes, the service sector, and industry are responsible for transporting different types of fluids from one place to another. Considering the faucet design, the SolidWorks program was used for 3D studies. In-faucet flow analyses were performed using Ansys Fluent, a computational fluid dynamics program based on the finite volume method. In the analyses, lime particles were chosen. At the end of the analysis, the amount of erosion in the faucet was obtained.
本文采用计算流体力学的方法,研究了饮用水和自来水在水龙头中发生侵蚀腐蚀的原因。家庭、服务部门和工业中使用的管道负责将不同类型的流体从一个地方输送到另一个地方。考虑到水龙头的设计,使用SolidWorks程序进行3D研究。利用基于有限体积法的计算流体力学程序Ansys Fluent对水龙头内流动进行了分析。在分析中,选择石灰颗粒。在分析的最后,得到了水龙头的侵蚀量。
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引用次数: 0
Bonding, Structure and Uses of Metals 金属的粘合、结构和用途
Pub Date : 2022-11-18 DOI: 10.30564/jmmr.v6i1.5173
P. Lang
This work briefly describes some of the different features of groups ofmetals. It highlights recent progress in research into metals. It details thestructures and defects in solid metals. The common theories of metalsincluding the free electron theory, band theory, the ions in a sea ofelectrons model and the soft sphere model are discussed and their meritsare considered. It describes distinctions between the bonding in metalsand inter-metallic compounds. It shows the influence of bonding on theproperties of metals and alloys and provides a summary of tradition andnewer uses of metals.
这篇文章简要地描述了金属基团的一些不同特征。它强调了金属研究的最新进展。它详细介绍了固体金属的结构和缺陷。讨论了常用的金属理论,包括自由电子理论、能带理论、电子海离子模型和软球模型,并分析了它们的优点。它描述了金属和金属间化合物之间键合的区别。它显示了键合对金属和合金性能的影响,并概述了金属的传统和新用途。
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引用次数: 0
Anti-bacterial Properties of Transition Metal Complexes of Copper Metal Ion: A Mini Review 铜金属离子过渡金属配合物的抗菌性能综述
Pub Date : 2022-11-17 DOI: 10.30564/jmmr.v5i2.4836
A. N. Srivastva, N. Saxena, N. Singh, J. Kumar
Bacterial infections are a major cause for impulsive deaths in human beings.Bacterial infections of the respiratory, gastrointestinal and central nervoussystem account for the majority of cases of sudden casualties. Readily availabledrugs are getting ineffective by each passing day as the mutation is veryfast in these pathogenic microbes resulting in drug resistance. The growingresistance of bacteria necessitates the development of new and effectivecompounds of desired characteristics that could bar the rapid development ofbacterial cell inside of the host body. Along with cellular resistance for clinicalantibiotics, co-bacterial infections during microbial attacks (viz. virus, fungus,protozoans etc.) also demand for some novel antibacterial drugs having highefficacy and minimal side effects on human body. These antibiotics shouldalso be compatible with remedies ongoing for core microbial infections. So,in demand of search for effective antibacterial moieties, the scope of transitionmetal complexes as drug gives a good signal against the pathogenic bacteriaby inhibiting their growth. The action of metal complexes on bacterial cellmay be due to impremiablity, enzymatic interruptions, ribosomal interactions,disturbance in the path of protein synthesis, denaturing of genetic materialsetc. inside the cell. Metals in complexes may interrupt the lipophilisity throughthe bacterial cell wall. Inclusion of metal ions in organic moieties behavingas ligand delocalize π-electrons upon the entire chelate ring and this chelationresults in overlapping of ligand orbital and partial sharing of (+)ve chargeof metal ion with donor atoms. These structural modifications in metal andorganic lone pair donor species are the supposed reasons for their enhancedantimicrobial activities against pathogenic microbes. The present reviewfocuses on the impact of recently synthesized, well characterized mono andbinuclear transition metal complexes of Cu ions that have the potential to be the drug of the decade in medicinal inorganic chemistry for treating the bacterial diseases.
细菌感染是人类冲动死亡的主要原因。呼吸道、胃肠道和中枢神经系统的细菌感染占突发伤亡病例的大多数。由于这些致病微生物的突变非常快,导致耐药性,现成的药物每天都在变得无效。细菌耐药性的增长要求开发新的有效的化合物,这些化合物具有理想的特性,可以阻止宿主体内细菌细胞的快速生长。随着临床抗生素的细胞耐药,微生物攻击过程中的共菌感染(即病毒、真菌、原生动物等)也需要一些高效、对人体副作用小的新型抗菌药物。这些抗生素还应与正在进行的治疗核心微生物感染的药物兼容。因此,在寻找有效抗菌基团的需求中,过渡金属配合物作为药物的范围为抑制病原菌生长提供了良好的信号。金属配合物对细菌细胞的作用可能是由于不亲和性、酶中断、核糖体相互作用、蛋白质合成路径的干扰、遗传物质的变性等。在细胞内部。配合物中的金属可通过细菌细胞壁阻断其亲脂性。作为配体的金属离子在有机分子中的包合使π电子在整个螯合环上离域,这种螯合导致配体轨道重叠和金属离子与供体原子部分共享(+)v电荷。金属和有机孤对供体中的这些结构修饰被认为是它们对病原菌的抗菌活性增强的原因。本文综述了近年来合成的具有良好表征的单核和双核过渡金属铜离子配合物,它们有可能成为无机药物化学中治疗细菌性疾病的未来十年的药物。
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引用次数: 0
Spatial Investigation of Nilüfer Stream Arsenic Pollution in Previous and Post COVID-19 Pandemic and Evaluation of Health Risks for Adult People 2019冠状病毒病疫情前后nilicfer河砷污染空间调查及成人健康风险评价
Pub Date : 2022-08-23 DOI: 10.30564/jmmr.v5i2.4741
A. Katip
This study was carried out in Nilüfer Stream in Bursa City, where intensiveindustrial, agricultural and mining activities are existed. The temporal andspatial variation of arsenic was evaluated by examining its concentrationsbetween March 2015 and December 2021. Values between March 2015and December 2019 were evaluated as pre-pandemic, and values betweenMarch 2020 and December 2021 were evaluated as post-pandemic. Theresults were compared with national and international standards and thechronic and cancer risks were calculated for adults. When the 7-yeargeneral averages were examined, it was seen that the highest concentrationwas 0.0256 mg/L at the 8th Station, and the lowest concentration was0.0182 mg/L at the 1st Station. The reason why the highest value is atthe 8th station was that the wastewater of Nilüfer and Bursa OrganizedIndustrial Zones was discharged to Bursa West Wastewater TreatmentPlant before this station. After the pandemic the raises in concentrationswere observed at all stations, except for the 3rd Station. This shows thatthe pollution load had increased in general during the pandemic. However,it was estimated that there was a decrease in the pollution load of theindustrial wastewater coming to the 3rd Station, which was located afterthe Eastern Wastewater Treatment Plant of the City. It was observed thatall stations examined were higher than drinking water standards and lowerthan irrigation water standards according to WHO and Turkish NationalStandards. All measuring stations were greater than 1 of the hazardquotient (HQ) values. In terms of human consumption risk, all stations hada chronic and carcinogenic risk according to the values before and afterthe pandemic. After the pandemic conditions, the HQ order of the stationswas 8>10>7>9>2>6>4>1>3. In general, post-pandemic HQ values hadgenerally increased and the risk of cancer had increased.
这项研究是在布尔萨市的nil fer溪进行的,那里有密集的工业、农业和采矿活动。通过检测2015年3月至2021年12月的砷浓度,评估了砷的时空变化。2015年3月至2019年12月期间的值被评估为大流行前,2020年3月至2021年12月期间的值被评估为大流行后。结果与国家和国际标准进行了比较,并计算了成人的慢性和癌症风险。7年总平均值显示,第8站的浓度最高为0.0256 mg/L,第1站的浓度最低为0.0182 mg/L。第8站的最高值是由于在该站之前,nil fer和Bursa有组织工业区的废水已排放到Bursa西部污水处理厂。大流行后,除第3站外,所有监测站的浓度均有所上升。这表明,在大流行期间,污染负荷总体上有所增加。然而,据估计,进入3号站的工业废水污染负荷有所减少,该3号站位于城市东部污水处理厂之后。据观察,根据世界卫生组织和土耳其国家标准,所有被检查的站点都高于饮用水标准,低于灌溉用水标准。所有监测站的危害系数(HQ)值均大于1。在人类消费风险方面,根据大流行前后的数值,所有站点都具有慢性和致癌风险。疫情发生后,各监测站的总部排序为8>10>7>9>2>6>4>1>3。总的来说,大流行后的HQ值普遍增加,患癌症的风险也增加了。
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引用次数: 0
Producing High Purity Nickel Metal Powder from Nickel Wastes through Acidic Leaching by Sulfuric Acid 用硫酸酸浸法从镍废料中制取高纯金属镍粉
Pub Date : 2022-08-22 DOI: 10.30564/jmmr.v5i2.4877
Kh. A. Nekouee, mohammadbagher oshrieh, H. Abbaszadeh
Nickel has found increasing application in electronic, automobilemanufacturing, plating, and metal industries and so on. Producing highquality metal powders to satisfy increasing demand for advanced materialsis of very high importance. There are a few numbers of standard powderproduction techniques. An acidic leaching has been applied in presentresearch. Sulfuric acid has been used to leach nickel wastes of platingindustry. To produce nickel oxide powder furnaces with no protectingatmosphere and to produce pure nickel powder, tube furnace with hydrogenatmosphere has been applied. Variables performed in the research aretime, density of sulfuric acid, and amount of hydrogen peroxide. Toanalyze powders produced, EDS element analysis and to determine size ofpowder particles, SEM has been applied. It was shown by the results thatthe highest amount of nickel dissolution in sulfuric acid (98%) has takenplace during one hour and there is a direct relationship between hydrogenperoxide amount and nickel dissolution in sulfuric acid.
镍在电子、汽车制造、电镀、金属工业等方面的应用越来越广泛。生产高质量的金属粉末,以满足对先进材料日益增长的需求。有几种标准的粉末生产技术。酸性浸出法已在本研究中得到应用。用硫酸浸出镀镍废渣。为了生产无保护气氛的氧化镍粉末炉和生产纯镍粉,采用了带氢气氛的管式炉。研究中执行的变量有时间、硫酸的密度和过氧化氢的量。为了对生产的粉末进行分析、能谱分析和确定粉末颗粒的大小,应用了扫描电镜。结果表明,1小时内镍在硫酸中的溶解量最高(98%),双氧水的用量与镍在硫酸中的溶解有直接关系。
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引用次数: 0
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Journal of Metallic Material Research
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