Annales De Chimie-science Des Materiaux最新文献_第7页

Residual Stress Generation at Crack Tip under Thermomechanical Effects of Aluminum Alloy 2024-T3: Numerical Modelisation 2024-T3铝合金热力学效应下裂纹尖端残余应力的产生:数值模拟

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Annales De Chimie-science Des Materiaux Pub Date : 2020-03-15 DOI: 10.18280/acsm.440108

Tayeb Kebir, M. Benguediab, M. Bouamama, Zine Harchouche

引用次数: 1

Grain Growth and Oxidation Resistance of Fe-Cr-Al Electrothermal Alloy Doped with Yttrium 掺钇Fe-Cr-Al电热合金的晶粒生长及抗氧化性能

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Annales De Chimie-science Des Materiaux Pub Date : 2020-03-15 DOI: 10.18280/acsm.440104

Zhaoyu Wu, Guang Wen, Yong Han

{"title":"Grain Growth and Oxidation Resistance of Fe-Cr-Al Electrothermal Alloy Doped with Yttrium","authors":"Zhaoyu Wu, Guang Wen, Yong Han","doi":"10.18280/acsm.440104","DOIUrl":"https://doi.org/10.18280/acsm.440104","url":null,"abstract":"Received: 9 September 2019 Accepted: 17 December 2019 This paper mainly explores how the addition of yttrium (Y) affects the grain growth and oxidation resistance of Fe-Cr-Al electrothermal alloy under high temperatures. Firstly, five groups of Y-free samples of Fe-Cr-Al electrothermal alloy were prepared through hot forging, hot rolling and cold rolling, and each group was doped with different amounts of Y and treated at several temperature levels. The element distribution and cross-sectional morphology of the oxide film were obtained by scanning electron microscopy (SEM). The evolution of the oxide film was monitored in backscattering Raman configuration. According to the surface and cross-sectional morphologies and Xray diffraction (XRD) spectra, it is concluded that the addition of Y can refine the grain size, inhibit the grain growth and improve the oxidation resistance of Fe-Cr-Al alloy under high temperature, creating a continuous dense layer of oxide film on the matrix; the density and continuity of the film can be improved by adding a trace amount of Y (0.1wt.%). In this case, the film will adhere to the matrix more tightly, reducing the oxidation rate. However, a high Y dose (0.4wt.%) will thicken the oxide film and reduce the oxidation resistance of the alloy. The optimal dose of Y is 0.1wt.% for the Fe-Cr-Al alloy. The research results provide a reference for improving the performance of Fe-CrAl alloy with rare earth (RE) elements.","PeriodicalId":7897,"journal":{"name":"Annales De Chimie-science Des Materiaux","volume":"47 1","pages":"29-36"},"PeriodicalIF":0.8,"publicationDate":"2020-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81161847","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

Experimental Study on Direct Shear Mechanical Characteristics of Warm Frozen Silty Clay 暖冻粉质粘土直剪力学特性试验研究

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Annales De Chimie-science Des Materiaux Pub Date : 2020-03-15 DOI: 10.18280/acsm.440107

Fengpan Zhu, Lanyun Chen, Yao Yonghe, Quanwei Zhao, Junhua Li

{"title":"Experimental Study on Direct Shear Mechanical Characteristics of Warm Frozen Silty Clay","authors":"Fengpan Zhu, Lanyun Chen, Yao Yonghe, Quanwei Zhao, Junhua Li","doi":"10.18280/acsm.440107","DOIUrl":"https://doi.org/10.18280/acsm.440107","url":null,"abstract":"Received: 15 August 2019 Accepted: 28 November 2019 The strength of the warm frozen soil is the key to the design of buildings and structures in the permafrost region, laying the basis for the safe operation and stability evaluation in the later stage of building/structure projects. In this paper, the frozen red silty clay is collected from Wudaoliang section of Qinghai-Tibet Highway, and prepared into samples for direct shear experiments. During the experiments, the direct shear properties of the samples were observed under different densities, normal stresses, water contents, temperatures, etc. The results show that, with the growing density, the cohesion of the frozen silty clay continues to increase, while the internal friction angle decreases first and then increases; with the growth in water content, the cohesion and internal friction angle show the same trends, but the angle increment is small; with the increase in normal stress, the internal friction angle exhibits a declining trend; the shear strength of the frozen soil has a linear relationship with temperature. Through theoretical analysis, the author established an expression for the relationship between shear strength and temperature of warm frozen soil at 0~-2°C, and confirmed that the shear stress-strain relationship of the frozen silty clay belongs to the strain hardening type, which obeys the hyperbolic model proposed by Clough and Duncan. The research findings lay a solid basis for the building/structure design in permafrost regions.","PeriodicalId":7897,"journal":{"name":"Annales De Chimie-science Des Materiaux","volume":"22 1","pages":"53-58"},"PeriodicalIF":0.8,"publicationDate":"2020-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84475798","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: 3

A Review on Various Aspects of Jarosite and Its Utilization Potentials 黄钾铁矾的研究进展及利用潜力

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Annales De Chimie-science Des Materiaux Pub Date : 2020-03-15 DOI: 10.18280/acsm.440106

N. Eftekhari, M. Kargar, F. Zamin, Nahid Rastakhiz, Z. Manafi

{"title":"A Review on Various Aspects of Jarosite and Its Utilization Potentials","authors":"N. Eftekhari, M. Kargar, F. Zamin, Nahid Rastakhiz, Z. Manafi","doi":"10.18280/acsm.440106","DOIUrl":"https://doi.org/10.18280/acsm.440106","url":null,"abstract":"Received: 15 November 2019 Accepted: 28 January 2020 Jarosite is an effective scavenger for metals by the chemical formula AFe3(SO4)2(OH)6. In the present article, a comprehensive literature review is performed on the formation, decomposition, and utilization of jarosite. Based on reviewed studies, biological jarosite seeds can shorten the induction period and reduce the temperature limit in the jarosite precipitation. Also, the precipitation process of jarosite is more complete with biological jarosite seeds. The crystallization parameters such as Fe2(SO4)3 concentration, agitation speed, pH and temperature have significantly affected on the morphology and the particles size of jarosite. Decomposition of jarosite is carried out using two different methods thermal and hydrothermal. Jarosite seed is a potential resource, which has to be recycled in a technically feasible and environmentally friendly manner. Besides, it is observed that jarosites have several advantages such as control iron in hydrometallurgy, zinc industry, arsenic removal and other impurities, pigment, nanoparticles, filling materials, adsorption materials, acidic reagent, and catalytic materials.","PeriodicalId":7897,"journal":{"name":"Annales De Chimie-science Des Materiaux","volume":"38 1","pages":"43-52"},"PeriodicalIF":0.8,"publicationDate":"2020-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75217478","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: 26

Characteristics of Densified Oil Palm Empty Fruit Bunches Blended with Carbon Nanotube Particles 碳纳米管混合致密油棕空果束的特性研究

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Annales De Chimie-science Des Materiaux Pub Date : 2020-03-15 DOI: 10.18280/acsm.440102

N. A. Rahman, M. F. Hasan, Bemgba Bevan Nyakuma, Mohd Rosdzimin Abdul Rahman, Md. Mizanur Rahman, S. A. Osman, Mohamad Asrul Bosiran, T. Abdullah

引用次数: 0

Resistance to Chloride Ion Permeability of Concrete Mixed with Fly Ash, Slag Powder, and Silica Fume 粉煤灰、矿渣粉和硅粉混合混凝土抗氯离子渗透性的研究

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Annales De Chimie-science Des Materiaux Pub Date : 2020-03-15 DOI: 10.18280/acsm.440109

C. Wang, Yuanxi Wang, Zhiliang Meng

{"title":"Resistance to Chloride Ion Permeability of Concrete Mixed with Fly Ash, Slag Powder, and Silica Fume","authors":"C. Wang, Yuanxi Wang, Zhiliang Meng","doi":"10.18280/acsm.440109","DOIUrl":"https://doi.org/10.18280/acsm.440109","url":null,"abstract":"Received: 17 September 2019 Accepted: 10 November 2019 This paper attempts to study the resistance to chloride ion permeability of concrete mixed with different admixtures such as fly ash (FA), slag powder (SP), and silica fume (SF). For this, taking the C50 concrete with the 1:1 proportion of FA and SP, the test method for rapid chloride ion migration (RCM) coefficients was used to study the resistance to chloride ion permeability and economic benefits of the concrete under the conditions of different total amount of admixtures, SF content, and air content. The results show that the increase in the total amount of the admixture can improve the concrete resistance to chloride ion penetration, but in a gradually weakening trend; the increase in SF content can increase the concrete resistance to chloride ion penetration, but the enhancement effect is gradually decreased; the SF has more significant effect on improving the 56d concrete resistance to chloride ion penetration; the increase of air content greatly increases the chloride ion migration coefficient of concrete at 28d, and the chloride ion migration coefficient increases linearly at 56d; the air content within 5% has an insignificant effect on the resistance to the chloride ion permeability; the NH40-2 was chosen to be the optimal mix ratio.","PeriodicalId":7897,"journal":{"name":"Annales De Chimie-science Des Materiaux","volume":"18 1","pages":"67-72"},"PeriodicalIF":0.8,"publicationDate":"2020-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75225376","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

A Review on Methods to Reduce Weight and to Increase Efficiency of Electric Motors Using Lightweight Materials, Novel Manufacturing Processes, Magnetic Materials and Cooling Methods 基于轻量化材料、新型制造工艺、磁性材料和冷却方法的电机减重增效方法综述

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Annales De Chimie-science Des Materiaux Pub Date : 2020-03-15 DOI: 10.18280/acsm.440101

D. Solomon, A. Greco, C. Masselli, Edison Gundabattini, R. Rassiah, Ravi Kuppan

{"title":"A Review on Methods to Reduce Weight and to Increase Efficiency of Electric Motors Using Lightweight Materials, Novel Manufacturing Processes, Magnetic Materials and Cooling Methods","authors":"D. Solomon, A. Greco, C. Masselli, Edison Gundabattini, R. Rassiah, Ravi Kuppan","doi":"10.18280/acsm.440101","DOIUrl":"https://doi.org/10.18280/acsm.440101","url":null,"abstract":"Received: 20 October 2019 Accepted: 3 December 2019 The electric motor is the mechanism that transforms electrical energy into mechanical energy. Nowadays, electric motors are the cause of a considerable share of the use of electricity and therefore of the energy consumptions (70% in the industrial sector and 2530% in the tertiary sector). Faced with ever-increasing energy demand and with a view to adhering to the all-over-the world imperative of adopting measures to reduce energy consumption in all the involved sectors, the use of efficiency enhanced electric motors is required. Generally, the efficiency of an electric motor depends on the type of motor, the size of the motor, the utilization factor, but also on the quality and quantity of the materials employed. Therefore, from all these aspects the need of using energy and costefficient components for developing electric motors arises. This review paper aims to draw a general framework on the methods of increasing efficiency and of reducing weight of the electric motors.","PeriodicalId":7897,"journal":{"name":"Annales De Chimie-science Des Materiaux","volume":"11 1","pages":"1-14"},"PeriodicalIF":0.8,"publicationDate":"2020-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73755052","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: 10

Particle Characterization of Bamboo Leaves Charcoal Resulted by Ball Milling 竹叶炭球磨颗粒特性研究

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Annales De Chimie-science Des Materiaux Pub Date : 2020-03-15 DOI: 10.18280/acsm.440110

Supriyono, Yoyo Saputro, Ngafwan, Wijianto, W. Siswanto, M. Mustapa

{"title":"Particle Characterization of Bamboo Leaves Charcoal Resulted by Ball Milling","authors":"Supriyono, Yoyo Saputro, Ngafwan, Wijianto, W. Siswanto, M. Mustapa","doi":"10.18280/acsm.440110","DOIUrl":"https://doi.org/10.18280/acsm.440110","url":null,"abstract":"Received: 7 November 2019 Accepted: 21 December 2019 The aim of this work is to characterize particle of bamboo leaves charcoal produced by ball milling process. The characterization parameter are the particle size and the morphology of the particle. The milling process was completed in a cylinder vial made from stainless steel. The milling element was a steel ball. The dimension of the cylinder vial was 120 mm length and 1 inch diameter, while the ball diameter was 0.25 inch. The charcoal was crushed manually then sieved with a filter size of 200 meshes. The particles passing the filter were then put together with the milling balls into cylinder vial. The cylinder vial was shaken to have ball collision for the size reduction. The shaker machine was operated at 1000 rpm for 2 million cycles. The empty space in the vial was varied for 1/2, 1/3, 1/4 and 1/5 empty space of vial volume. Further work is done to see the effect of the machine speed to the characteristics of particles. The machine is operated at 800 rpm, 900 rpm, 1100 rpm for 1/5 empty space and 0.25 inch ball diameter. Particle size analyzer (PSA) was used to measure average particle size, while Scanning electron microscope (SEM) and Energy Dispersive X-ray (EDX) were employed to see the particle morphology and the content of elements in the bamboo leaf charcoal. The results showed that the average size of particles is in the range of 300 nm to 600 nm. There is no certain relationship between final particle size and percentage of vial volume empty space. The SEM results showed that the particle shape is irregular as a result of fracture due to collision. The most dominant element is carbon which is more than 60% and the second is silicon dioxide (silica) which is more the 20%.","PeriodicalId":7897,"journal":{"name":"Annales De Chimie-science Des Materiaux","volume":"65 1","pages":"73-77"},"PeriodicalIF":0.8,"publicationDate":"2020-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81493743","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: 2

Recycling of Used Hydrogenated Nitrile Butadiene Rubber Through Powder Modification by Trans-Polyoctylene Rubber 反式聚辛橡胶粉体改性法回收废氢化丁腈橡胶

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Annales De Chimie-science Des Materiaux Pub Date : 2019-12-23 DOI: 10.18280/acsm.430604

Zhao Guiying, Wang Zhongguang, Liu Taichuang, Zhang Xiaoping

{"title":"Recycling of Used Hydrogenated Nitrile Butadiene Rubber Through Powder Modification by Trans-Polyoctylene Rubber","authors":"Zhao Guiying, Wang Zhongguang, Liu Taichuang, Zhang Xiaoping","doi":"10.18280/acsm.430604","DOIUrl":"https://doi.org/10.18280/acsm.430604","url":null,"abstract":"Received: 3 May 2019 Accepted: 14 September 2019 This paper mainly explores the modification of hydrogenated nitrile butadiene rubber (HNBR) powder with trans-polyoctylene rubber (TOR), and the application of the modified HNBR powder in the rubber lining of oil-resistant HNBR hose. The HNBR powder modified by the TOR was prepared, and different dosages of modified powder were filled into the HNBR lining. The resulting specimens were subjected to compression test, aging test, medium resistance test, etc. The results show that the rubber filled with modified powder always outperformed the rubber filled with original powder, indicating that the TOR improves the compatibility between rubber and powder; With the growing dosage of rubber powder, the rubber compound saw a decline in hardness, tensile strength, elongation and tear strength, but a rise in compression set; The aged rubber compound had a greater hardness and tensile strength, but a smaller elongation than the original rubber compound; The cost effectiveness of the rubber compound was maximized when 15 parts of rubber powder were added; In this case, all physical properties were all far above the standard for the rubber lining of oilresistant rubber hoses. The research results help to promote the recycling of used rubber and improve the environment.","PeriodicalId":7897,"journal":{"name":"Annales De Chimie-science Des Materiaux","volume":"77 1","pages":"383-388"},"PeriodicalIF":0.8,"publicationDate":"2019-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76803059","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

Hydrogen Embrittlement of 316L Stainless Steels Exposed in 1.0M Hydrochloric Acid Solution 316L不锈钢在1.0M盐酸溶液中的氢脆

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Annales De Chimie-science Des Materiaux Pub Date : 2019-12-23 DOI: 10.18280/acsm.430602

M. S. Hadi, S. N. Saud, E. Hamzah, M. F. Mamat

引用次数: 2