检索结果-南通市图书馆

Application of g-C_(3)N_(4)/sol-gel nanocomposite on AM60B magnesium alloy and investigation of its properties

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2023年第6期30卷 1113-1127页

作者： Roghaye Samadianfard Davod Seifzadeh Burak dikici Corrosion and Industrial Electrochemistry Research Laboratory University of Mohaghegh ArdabiliArdabil P.O.Box 179Iran Ataturk University Department of Metallurgical and Materials EngineeringErzurum 25240Turkey

To protect the AM60B magnesium alloy from corrosion,a sol-gel coating containing hydroxylated g-C_(3)N_(4)nanoplates was *** chemical composition of the hydroxylated g-C_(3)N_(4)nanoplates was investigated using X-ray photoelectron spectroscopy(XPS).The hydroxylation process did not affect the crystal size,specific surface area,pore volume,average pore diameter,and thermal stability of the g-C_(3)N_(4)*** incorporating pristine and hydroxylated g-C_(3)N_(4)nanoplates,dense sol-gel coatings were *** electron microscopy(TEM)revealed the uniform distribution of the modified g-C_(3)N_(4)in the *** average roughness of the coating was also reduced after adding the modified nanoplates due to the decreased aggregation *** impedance spectroscopy(EIS)examinations in simulated acid rain revealed a significant improvement in the anticorrosion properties of the sol-gel film after the addition of the modified g-C_(3)N_(4)due to the chemical bonding of the coating to the nanoplates.

关键词： Mg alloy corrosion protection sol-gel g-C_(3)N_(4)nanocomposite electrochemical impedance spectroscopy

Microstructure,mechanical properties,and corrosion resistance of an explosively welded Mg-Al composite

在线全文

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2022年第4期10卷 1086-1095页

作者： Mustafa Acarer Bilge Demir Burak dikici Emin Salur Department of Metallurgical and Materials Engineering Technology FacultySelcuk UniversityKonya 42075Turkey Department of Mechanical Engineering Karabuk UniversityKarabuk 78100Turkey Department of Metallurgical and Materials Engineering Atatürk UniversityErzurum 25240Turkey

In this study,an attempt was made to manufacture an AZ31–Al5005 laminated composite by explosive welding.A mixture of ammonium nitrate(90%),fuel oil(5%),and TNT(5%)was used as the *** detonation velocity of the explosive material was approximately 3100 m•s^(−1).The microstructure and mechanical and corrosion properties of the joint were comparatively *** characterisation of the joint was conducted by optical microscopy(oM),scanning electron microscopy with energy-dispersive spectroscopy(SEM-EDS),high-resolution transmission electron microscopy(HR-TEM),and X-ray diffraction(XRD).The mechanical properties were determined using micro-Vickers hardness,tensile,and Charpy impact *** addition,electrochemical tests were conducted on the AZ31–Al5005 laminated composite and the individual components to determine their corrosion *** corrosion behaviours of the structures were determined in a 3.5%NaCl solution at room temperature using potentiodynamic scanning(PDS).The metallurgical structure and mechanical properties of the joints were within the acceptable limits.

关键词： corrosion welded Microstructure

Self-assembly of coumarin molecules on plasma electrolyzed layer for optimizing the electrochemical performance of AZ31 Mg alloy

在线全文

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2023年第5期11卷 1618-1628页

作者： Mosab Kaseem Burak dikici Ali Dafali Arash Fattah-alhosseini Department of Nanotechnology and Advanced Materials Engineering Sejong UniversitySeoul 05006Republic of Korea Department of Metallurgical and Materials Engineering Ataturk UniversityErzurum 25240Turkey Faculty of Sciences oujda Department of ChemistryMohamed the First UniversityOujdaMorocco Department of Materials Engineering Bu-Ali Sina UniversityHamedan 65178-38695Iran

A novel inorganic-organic layer with outstanding corrosion resistance in a 3.5wt.% NaCl solution was fabricated by taking advantage of the unique interactions between coumarin (CoM) molecules and the porous layer formed on Mg alloy. To achieve this aim, the AZ31 Mg alloy coated via microarc oxidation (MAo) coating was placed in an ethanolic solution of CoM for 6 and 12 h at 25 ℃. By reducing the surface area exposed to the corrosive species, the donor-acceptor complexes produced by the particular interactions between the CoM and MAo surface would successfully prevent the corrosion of Mg alloy substrate. The MAo layer would provide the ideal sites for the charge-transfer-induced physical and chemical locking, leading to uneven organic layer nucleation and crystal growth with a thatch-like structure. To evaluate the formation mechanism of such hybrid composites and highlight the key bonding modes between the CoM and MAo, theoretical simulations were conducted.

关键词： Mg alloy Hybrid coating Coumarin Porous layer Corrosion DFT

Effect of Si on austenite stabilization,martensite morphology,and magnetic properties in Fe-26%Ni-x%Si alloys

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2011年第2期18卷 192-196页

作者： H.Gungunes E.Yasar M.dikici Science and Arts Faculty Department of Physics Hitit University Science and Arts Faculty Department of Physics Kirikkale University

The effect of Si on the austenite stabilization, martensite morphology, and magnetic properties in Fe-26%Ni-x%Si （x=3.5, 5, and 6） alloys have been studied by means of transmission electron microscopy （TEM） and M？ssbauer spectroscopy techniques. TEM observations reveal that the martensite morphology is closely dependent on the Si content. The volume fraction changes of martensite and austenite phases, the hyperfine magnetic field, and isomer shift values have been determined by Mssbauer spectroscopy. The M？ssbauer study reveals that the hyperfine magnetic field, the isomer shift values and the volume fraction of martensite decrease with increasing Si content.

关键词： ferrous alloys martensite morphology magnetic properties transmission electron microscopy (TEM) m6ssbauer spectroscopy

A novel dual-functional layer exhibiting exceptional protection and photocatalytic activity by organic functionalization of plasma electrolyzed layer

在线全文

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2023年第4期11卷 1247-1263页

作者： Mosab Kaseem Tehseen Zehra Burak dikici Ali Dafali Arash Fattah-alhosseini Department of Nanotechnology and Advanced Materials Engineering Sejong UniversitySeoul 05006Republic of Korea Department of Metallurgical and Materials Engineering Ataturk UniversityErzurum 25240Turkey Department of Chemistry Faculty of Sciences OujdaMohamed the First UniversityOujdaMorocco Department of Materials Engineering Bu-Ali Sina UniversityHamedan 65178-38695Iran

The formation of inorganic-organic hybrids(IoH)on the metallic substrates would play a decisive role in improving their structural and functional *** this work,the growth of organic coating(oC)consisting of coumarin-3-carboxylic acid(3-CCA)and albumin(ALB)on the inorganic layer(IC),produced by plasma electrolysis of AZ31 Mg alloy,led to enabling organically synergistic reactions on the porous inorganic surface,forming a flake-like structure sealing the structural defects of *** actions between oC and IC endow the flake-like structures with chemical protection and photocatalytic *** contact with a corrosive solution,the IoH layer possesses stable morphologies that delay the corrosive degradation of the whole *** electrochemical stability of the sample produced by immersion IC in the organic solution for 10 h(IoH2 sample)was superior to the other samples as it had the lowest corrosion current density(1.69×10^(−10)A·cm^(−2))and the highest top layer resistance(1.2×10^(7)Ω·cm^(2)).Moreover,the IoH layer can photodegrade the organic pollutants in model wastewater,where the highest photocatalytic efficiency of 99.47%was found in the IoH2 ***,computational calculations were performed to assess the relative activity of different parts of the ALB and 3-CCA structures,which provide helpful information into the formation mechanism of the IoH materials.

关键词： Functional layer PE Albumin Coumarin Porous layer Corrosion Photocatalyst

Effects of aging on the microstructure of a Cu-Al-Ni-Mn shape memory alloy

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2011年第4期18卷 430-436页

作者： U.Sari T.Kirindi F.ozcan M.dikici Department of Elementary Education Elementary Science EducationKirikkale UniversityKirikkale 71450Turkey Department of Computer Education and Instructional Technology Kirikkale UniversityKirikkale 71450Turkey Institute of Sciences Kirikkale UniversityKirikkale 71450Turkey Department of Physics Kirikkale UniversityKirikkale 71450Turkey

The influence of aging on the microstructure and mechanical properties of Cu-11.6wt%Al-3.9wt%Ni-2.5wt%Mn shape memory alloy（SMA） was studied by means of scanning electron microscopy（SEM）,transmission electron microscopy（TEM）,X-ray diffractometer,and differential scanning calorimeter（DSC）.Experimental results show that bainite,γ2,and α phase precipitates occur with the aging effect in the *** aging at 300°C,the bainitic precipitates appear at the early stages of aging,while the precipitates of γ2 phase are observed for a longer aging *** the aging temperature increases,the bainite gradually evolves into γ2 phase and equilibrium α phase（bcc） precipitates from the remaining parent ***,the bainite,γ2,and α phases appear,while the martensite phase disappears progressively in the *** bainitic precipitates decrease the reverse transformation temperature while the γ2 phase precipitates increase these temperatures with a decrease of solute content in the retained parent *** the other hand,these precipitations cause an increasing in hardness of the alloy.

关键词： copper alloys shape memory effect martensitic transformations aging precipitates

Improving the electrochemical stability of AZ31 Mg alloy in a 3.5wt.%NaCl solution via the surface functionalization of plasma electrolytic oxidation coating

在线全文

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2022年第5期10卷 1311-1325页

作者： Mosab Kaseem Tehseen Zehra Burak dikici Ali Dafali Hae Woong Yang Young Gun Ko Department of Nanotechnology and Advanced Materials Engineering Sejong UniversitySeoul 05006Republic of Korea Department of Metallurgical and Materials Engineering Ataturk UniversityErzurum 25240Turkey Faculty of Sciences oujda Department of ChemistryMohamed the First UniversityOujdaMorocco Pohang Institute of Metal Industry Advancement Pohang 37666Republic of Korea Materials Electrochemistry Group School of Materials Science and EngineeringYeungnam UniversityGyeongsan 38541Republic of Korea

The unique interactions between hexadecanoic acid(HA)and albumin(ALB)molecules on the surface of the porous layer of AZ31 Mg alloy were exploited to fabricate a novel hybrid composite film with excellent electrochemical stability in a 3.5 wt.%Na Cl ***,the inorganic layer(IL)obtained by plasma electrolytic oxidation of AZ31 Mg alloy in an alkaline-phosphate-Wo_(3)electrolyte was soaked in an organic solution composed of ALB and HA for 10 and 24 h at 60℃.Although albumin and HA may coexist on the same surface of IL,the higher reactivity of ALB molecules would prevent the formation of a thick layer of *** donor-acceptor complexes formed due to the unique interactions between ALB and/or HA and IL surface would reduce the area exposed to the corrosive species which in turn would efficiently protect the substrate from *** porous structure of the IL would provide preferable sites for the physical and chemical locking triggered by charge-transfer phenomena,leading to the inhomogeneous nucleation and crystal growth of a flowery flakes-like organic *** calculations were performed to reveal the primary bonding modes between the ALB,HA,and IL and to assess the mechanistic insights into the formation of such novel hybrid composites.

关键词： Hybrid composite Coordination bond Albumin Fatty acid Porous layer Corrosion Theoretical approach

Effect of hydroxyapatite:zirconia volume fraction ratio on mechanical and corrosive properties of Ti-matrix composite scaffolds

在线全文

学校读者我要写书评

暂无评论

Transactions of Nonferrous Metals Society of China 2022年第3期32卷 882-894页

作者： Mehmet ToPUZ Burak dikici Mehmet GAVGALI Yasemin YILMAZER Department of Mechanical Engineering Van YüzüncüYıl UniversityVan 65080Turkey Department of Metallurgical and Materials Engineering Atatürk UniversityErzurum 25240Turkey Department of Mechanical Engineering Necmettin Erbakan UniversityKonya 42090Turkey Department of Molecular Biology and Genetics İstanbul Sabahattin Zaim Universityİstanbul 34303Turkey

Ti-based scaffolds reinforced with zirconia and hydroxyapatite were produced successfully by a hybrid method with an eco-friendliness and low cost to obtain low elastic modulus(E) with sufficient physical, electrochemical and biological properties. The effect of simultaneous modification of the volume fraction of hydroxyapatite(HA) and zirconia(Zro_(2)) on scaffolds was investigated in terms of mechanical, corrosive, and antibacterial properties. Scanning electron microscopy with attached electron dispersive spectroscopy and X-ray diffraction were used for the characterization of scaffolds. Compression and electrochemical tests were performed to determine mechanical properties with detailed fracture mechanism and in-vitro corrosion susceptibility to simulated body fluid at 37 ℃,respectively. Antibacterial tests were carried out by comparing the inhibition areas of *** and *** bacteria. It was observed that the mechanical strength of the scaffolds decreased with increasing HA:Zro_(2)volume fraction *** lowest E was achieved(6.61 GPa) in 6:4 HA:Zro_(2)composite scaffolds. Corrosion current density(J_(corr)) values were calculated to be 21, 337, and 504 μ A/cm^(2) for unreinforced Ti, 3:2 and 6:4 HA:Zro_(2)reinforced scaffolds,respectively. The inhibition capacity of the 6:4 reinforced composite scaffold was found to be more effective against *** bacteria than other scaffolds.

关键词： titanium biocomposite hydroxyapatite zirconia scaffold mechanical properties in-vitro corrosion

Physico-Chemical and Microbiological Properties of a Traditional Turkey Cheese Tomas/Serto （Dorak）

在线全文

学校读者我要写书评

暂无评论

Journal of Agricultural Science and Technology(B) 2016年第2期6卷 129-134页

作者： Ayse Burcu Kurtulgan Abdullah dikici Department of Food Engineering Faculty of Engineering Tunceli University Tunceli 62100 Turkey Department of Food Engineering Faculty of Engineering Usak University Usak 64100 Turkey

Turkey is a country producing various kinds of cheese. Tomas cheese is a kind of cheese that is still traditionally produced, and it is not widely-known. In this study, the characteristic properties of Tomas cheese, a local product that is extensively consumed in the city of Tunceli and its environs, have been examined. For this purpose, samples from cheese varieties currently on sale in the cities of Tunceli and Elazl~ have been taken, and some of their physico-chemical and microbiological properties have been determined. The results of physico-chemical analysis showed that the average moisture rate of the samples was 53.24%, average ash rate 4.24%, average dry matter 46.76%, average acidity rate in terms of lactic acid 1.08%, average salt rate 2.93%, average fat rate 17.66%, average fat-free dry matter rate 25.56% and average pH value 4.67. The microbiological analysis data showed that the average values for the total aerobic mesophyll bacteria （TAMB） was 7 loglo kob/g, 2.3 logl0 kob/g for coliform, 4.6 logl0 kob/g for yeast, 5.5 logl0 kob/g for mold, 6.8 log10 kob/g for Lactococcus spp., and 6.1 log10 kob/g for Lactobacillus spp.. The results show the high variation among samples, proving that there has not been a standard production procedure. It has been established that the hygienic condition of the product changes according to the production process, and the probability for cross contamination is high. A large number of studies need to be carded out for this kind of traditional food items, due to lack of enough literature data in this paper.

关键词： Tomas/Serto (Dorak) cheese traditional food physico-chemical and microbiological properties.