European Journal of Materials Science and Engineering最新文献_第4页

ANALYSIS REGARDING THE MECHANICAL PROPERTIES OF ALKALI-ACTIVATED FLY ASH-BASED GEOPOLYMER CONCRETE CONTAINING SPENT GARNET AS REPLACEMENT FOR SAND AGGREGATES 含废石榴石替代砂石骨料的碱活性粉煤灰型地聚合物混凝土力学性能分析

European Journal of Materials Science and Engineering Pub Date : 2023-03-20 DOI: 10.36868/ejmse.2023.08.01.011

A. Lăzărescu, B. Ionescu, A. Hegyi, Carmen Florean

{"title":"ANALYSIS REGARDING THE MECHANICAL PROPERTIES OF ALKALI-ACTIVATED FLY ASH-BASED GEOPOLYMER CONCRETE CONTAINING SPENT GARNET AS REPLACEMENT FOR SAND AGGREGATES","authors":"A. Lăzărescu, B. Ionescu, A. Hegyi, Carmen Florean","doi":"10.36868/ejmse.2023.08.01.011","DOIUrl":"https://doi.org/10.36868/ejmse.2023.08.01.011","url":null,"abstract":"As research regarding the production and optimization of geopolymer materials is constantly increasing and is fundamentally motivated by the need, identified both in the global ecological context and at national level, new materials can be developed using this type of binder. Sustainable consumption of resources, focuses on the capitalization of existing waste and prevention of generating new ones, therefore adopting the Sustainable Development principles. The increase in the utilization of sand from rivers for various construction purposes, which also disturbs the environment can be considered another damaging factor for the environment. Recycling of garnets and their use as replacement for sand aggregates could provide an ecological solution for the production of the alkali-activated fly ash-based geopolymer binders. The aim of this paper is to present preliminary results regarding the use of spent garnet as replacement for sand aggregates in the production of alkali-activated fly ash-based geopolymer binders using Romanian local raw materials and to study its influence on the mechanical performances of the binder.","PeriodicalId":32608,"journal":{"name":"European Journal of Materials Science and Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44506093","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

Cold hydrostatic sintering of 45S5 bioactive glass 45S5生物活性玻璃的冷静压烧结

European Journal of Materials Science and Engineering Pub Date : 2023-02-14 DOI: 10.1080/26889277.2023.2166876

Q. Nawaz, Usanee Pantulap, K. Hurle, Nan Luo, S. Grasso, A. Boccaccini

引用次数: 0

Effect of helium as process gas on laser powder bed fusion of Ti-6Al-4V studied with operando diffraction and radiography 用operando衍射和射线照相技术研究了氦气作为工艺气体对Ti-6Al-4V激光粉末床熔合的影响

European Journal of Materials Science and Engineering Pub Date : 2022-12-31 DOI: 10.1080/26889277.2022.2081622

C. Pauzon, S. Van Petegem, E. Hryha, Cynthia Sin Ting Chang, S. Hocine, H. Van Swygenhoven, C. de Formanoir, S. Dubiez-Le Goff

{"title":"Effect of helium as process gas on laser powder bed fusion of Ti-6Al-4V studied with operando diffraction and radiography","authors":"C. Pauzon, S. Van Petegem, E. Hryha, Cynthia Sin Ting Chang, S. Hocine, H. Van Swygenhoven, C. de Formanoir, S. Dubiez-Le Goff","doi":"10.1080/26889277.2022.2081622","DOIUrl":"https://doi.org/10.1080/26889277.2022.2081622","url":null,"abstract":"Abstract The utilisation of helium as process gas in laser powder bed fusion limits the generation of Ti-6Al-4V hot and incandescent spatters and enhances their cooling rate. In the present study, operando X-ray diffraction using synchrotron X-rays permits to verify that the cooling rates experienced by the deposited material are not significantly affected by the process gas unlike spatters. Topography measurements of the top printed surface reveal lower roughness of He-produced samples, attributed to the previously observed reduction of spatters with He and thus a reduction of redepositions on the powder bed and printed surfaces. Operando radiography provides with insights on the spatter formation mechanisms namely particle entrainment, agglomeration, melting and spheroidization. Highlights The top surface average roughness of samples produced with He is lower than that of Ar equivalent Deposited Ti-6Al-4V cooling rates during LPBF are not significantly affected by the use of He Grain size and orientation of Ti-6Al-4V is similar when processing under Ar, He, and a mixture of both Operando radiography permits to identify the mechanisms of Ti-6Al-4V spatter formation","PeriodicalId":32608,"journal":{"name":"European Journal of Materials Science and Engineering","volume":"7 1","pages":"422 - 435"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84186623","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

POSSIBILITY FOR IMPROVING THE PROPERTIES OF THE PLASTIC MOULD TOOL IN ORDER TO INCREASE ITS SERVICE LIFE 提高塑料模具性能以增加其使用寿命的可能性

European Journal of Materials Science and Engineering Pub Date : 2022-12-20 DOI: 10.36868/ejmse.2022.07.04.299

L. Toth, E. R. Fábián

引用次数: 0

INFLUENCE OF CHEMICAL TREATMENT ON THEMECHANICAL PROPERTIES AND MORPHOLOGY OF MUSA PARASIDICA FIBER (PLANTAIN) 化学处理对芭蕉纤维力学性能和形态的影响

European Journal of Materials Science and Engineering Pub Date : 2022-12-20 DOI: 10.36868/ejmse.2022.07.04.279

Sunday G. Borisade, I. Oladele, O. Akinlabi

引用次数: 1

CHITOSAN AS BIOMATERIAL - AN OVERVIEW OF FUNCTIONALISATION WITH PLANTS EXTRACT 壳聚糖作为生物材料——植物提取物功能化综述

European Journal of Materials Science and Engineering Pub Date : 2022-12-20 DOI: 10.36868/ejmse.2022.07.04.261

Silvia Nicuța NOAPTEȘ ANGHEL, Anna Cazanevscaia Busuioc, R. Dinică, G. Cârâc

{"title":"CHITOSAN AS BIOMATERIAL - AN OVERVIEW OF FUNCTIONALISATION WITH PLANTS EXTRACT","authors":"Silvia Nicuța NOAPTEȘ ANGHEL, Anna Cazanevscaia Busuioc, R. Dinică, G. Cârâc","doi":"10.36868/ejmse.2022.07.04.261","DOIUrl":"https://doi.org/10.36868/ejmse.2022.07.04.261","url":null,"abstract":"Chitosan as natural biomaterial is used in tissue engineering and regenerative medicine as a biomaterial alone, as well as in combination with other polymers. The recent research to obtain functionalized chitosan has also focused on the use of environmentally friendly natural resources, introducing different plants, for which new properties and applications in various modern fields have been highlighted. The use of hydro-alcoholic extracts and essential oils from plants to the production of functionalized chitosan-based materials (membranes, films, nanoparticles) shown improved antimicrobial properties and the use of these materials in various fields (medicine, food, industry, cosmetics and environment). The most valuable sources of natural compounds come from plants, being represented by a wide class of phenolic substances that can appear in all parts of plants in fresh or in dried form, extracts or essential oils from seeds, nuts, fruits, vegetables, leaves, roots or even from the stem and bark. The characterisation of membranes and films incorporating chitosan and plants extracts are referring of physical characterisation, structural, morphological structure, mechanical and biological properties based on their antimicrobial potential.","PeriodicalId":32608,"journal":{"name":"European Journal of Materials Science and Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42996242","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

METALLOGRAPHIC STUDIES OF IRAN'S IRON AGE: CASE STUDY BRONZE PIECES FROM JEYRĀN TEPE, OZBAKI 伊朗铁器时代的金相研究&以OZBAKI JEYRĀN TEPE青铜件为例

European Journal of Materials Science and Engineering Pub Date : 2022-12-20 DOI: 10.36868/ejmse.2022.07.04.288

B. Sodaei, Hanieh Rahnema

{"title":"METALLOGRAPHIC STUDIES OF IRAN'S IRON AGE: CASE STUDY BRONZE PIECES FROM JEYRĀN TEPE, OZBAKI","authors":"B. Sodaei, Hanieh Rahnema","doi":"10.36868/ejmse.2022.07.04.288","DOIUrl":"https://doi.org/10.36868/ejmse.2022.07.04.288","url":null,"abstract":"This study is a report of the results of metallographic study of 5 bronze pieces found in Jeyrān Tepe dating back to the Iron Age II. Jeyrān Tepe is located 250 m southwest of Ozbaki as one of its hills. The obtained metal pieces included bracelets, necklaces and hairpins, which were used for decoration. The objective of this article was to identify the process of bronze production and study the structure and composition of the components of metal pieces, Iron Age in Jeyrān Tepe, based on laboratory studies that have addressed questions in the field of elemental compositions and the method of bronze production in the study area. For this purpose, five bronze pieces were studied using vegetative electron microscope with scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS) analysis, metallographic studies at 200 × magnification and X-Ray diffraction (XRD) to identify the chemical composition, metal production technique and type of alloy. The results of XSEM-EDS on the metal background of the samples showed that the constituent elements of these metals are oxygen, copper, tin, silicon, chlorine, sulfur, aluminum, magnesium and carbon. The main reported elements are copper and tin, so metals are made of pure copper and copper-tin alloys. The different amount of tin in bronze pieces of Jeyrān Tepe could be due to uncontrolled extraction and alloying methods.","PeriodicalId":32608,"journal":{"name":"European Journal of Materials Science and Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44839649","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

METAL OXIDE ELECTRON TRANSPORT MATERIALS IN PEROVSKITE SOLAR CELLS: A REVIEW 钙钛矿太阳能电池中金属氧化物电子传输材料的研究进展

European Journal of Materials Science and Engineering Pub Date : 2022-12-20 DOI: 10.36868/ejmse.2022.07.04.225

Ankit Stephen Thomas

引用次数: 0

EXPERIMENTAL RESULTS ON THE IMPLEMENTATION AND USE OF RECOVERY BURNERS 回收燃烧器实施和使用的实验结果

European Journal of Materials Science and Engineering Pub Date : 2022-12-20 DOI: 10.36868/ejmse.2022.07.04.284

Dumitru Deonise, A. Ioana, L. Paunescu, M. Pollifroni, C. Deonise, Florin-Stefan Petcu, Ionela Luminita Canuta

引用次数: 0

Bibliometric review and recent advances in total scattering pair distribution function analysis: 21 years in retrospect 文献计量学综述及总散射对分布函数分析的最新进展:21年回顾

European Journal of Materials Science and Engineering Pub Date : 2022-12-01 DOI: 10.1080/26889277.2022.2150897

D. O. Akamo, A. Ijaola, Toyosi T. George, K. Page, D. Keffer, Yuzhan Li, Monojoy Goswami, T. Laclair, Kyle R. Gluesenkamp, Orlando Rios

引用次数: 1