Science of Sintering最新文献_第5页

Application of artificial neural networks in performance prediction of cement mortars with various mineral additives 人工神经网络在不同矿物添加剂水泥砂浆性能预测中的应用

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos2301011t

A. Terzic, Milada L. Pezo, L. Pezo

{"title":"Application of artificial neural networks in performance prediction of cement mortars with various mineral additives","authors":"A. Terzic, Milada L. Pezo, L. Pezo","doi":"10.2298/sos2301011t","DOIUrl":"https://doi.org/10.2298/sos2301011t","url":null,"abstract":"The machine learning technique for prediction and optimization of building material performances became an essential feature in the contemporary civil engineering. The Artificial Neural Network (ANN) prognosis of mortar behavior was conducted in this study. The model appraised the design and characteristics of seventeen either building or high-temperature mortars. Seven different cement types were employed. Seventeen mineral additives of primary and secondary origin were embedded in the mortar mixtures. Cluster Analysis and Principal Component Analysis designated groups of similar mortars assigning them a specific purpose based on monitored characteristics. ANN foresaw the quality of designed mortars. The impact of implemented raw materials on the mortar quality was assessed and evaluated. ANN outputs highlighted the high suitability level of anticipation, i.e., 0.999 during the training period, which is regarded appropriate enough to correctly predict the observed outputs in a wide range of processing parameters. Due to the high predictive accuracy, ANN can replace or be used in combination with standard destructive tests thereby saving the construction industry time, resources, and capital. Good performances of altered cement mortars are positive sign for widening of economical mineral additives application in building materials and making progress towards achieved carbon neutrality by reducing its emission.","PeriodicalId":21592,"journal":{"name":"Science of Sintering","volume":"1 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68811406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of rare earth oxide and graphite on the mechanical and tribological properties of Fe/Cu based sintered friction materials 稀土氧化物和石墨对Fe/Cu基烧结摩擦材料力学和摩擦学性能的影响

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos230306034r

K. Rajesh Kannan, R. Vaira Vignesh, M. Govindaraju, P. S. Samuel Ratna Kumar

{"title":"Influence of rare earth oxide and graphite on the mechanical and tribological properties of Fe/Cu based sintered friction materials","authors":"K. Rajesh Kannan, R. Vaira Vignesh, M. Govindaraju, P. S. Samuel Ratna Kumar","doi":"10.2298/sos230306034r","DOIUrl":"https://doi.org/10.2298/sos230306034r","url":null,"abstract":"Fe/Cu-based sintered friction materials are proven potential materials for heavy-duty applications. The current research explores the influence of rare earth oxide (Nd2O3) and graphite on the tribological characteristics of Fe/Cu-based friction materials. The constituents present in the friction material are Fe, Cu, Cg (1%, 3%, 5%, 7%), BaSO4, and Nd2O3 (5%). Optical microscopy and elemental mapping studies reveal the homogeneous distribution of elements in the matrix. Sintered density of the specimens showed a maximum of 70% of the theoretical density measured by Archimedes' principle. XRD analysis shows no new phase formation in all the sintered specimens. A peak microhardness result of 96 HV is obtained in specimen NG-01. The pin-on-disc tribotests are performed at an axial load of 50 N at a sliding velocity of 5.5 m/s. Specimen NG-03 with 3% graphite exhibited an optimum wear rate with a friction coefficient of 0.45. The surface morphology and elemental composition of the worn specimens are investigated. The morphological features inferred that the wear mechanism is predominantly mixed abrasive and adhesive.","PeriodicalId":21592,"journal":{"name":"Science of Sintering","volume":"1 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68811554","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterization of cobalt ferrite nanoparticles obtained by various synthesis methods and comparison with the Raman spectra of other ferrites and some cubic oxide spinels 对不同合成方法制备的钴铁氧体纳米颗粒进行了表征，并与其他铁氧体和一些立方氧化尖晶石的拉曼光谱进行了比较

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos230322035l

Z. Lazarević, A. Milutinović, L. Andjelković, M. Petrović, B. Hadžić, M. Romčević, J. Trajic, N. Romčević

{"title":"Characterization of cobalt ferrite nanoparticles obtained by various synthesis methods and comparison with the Raman spectra of other ferrites and some cubic oxide spinels","authors":"Z. Lazarević, A. Milutinović, L. Andjelković, M. Petrović, B. Hadžić, M. Romčević, J. Trajic, N. Romčević","doi":"10.2298/sos230322035l","DOIUrl":"https://doi.org/10.2298/sos230322035l","url":null,"abstract":"Single phase cobalt ferrite (CoFe2O4) with nanoparticles of similar sizes (15.7-19 nm) was obtained by different synthesis methods: coprecipitation, ultrasonically assisted coprecipitation, coprecipitation followed by mechanochemical treatment, microemulsion and microwave assisted hydrothermal synthesis. The obtained CoFe2O4 samples have been studied using a variety of characterization techniques: X-ray diffraction (XRD), Raman spectroscopy, far infrared (FIR) reflectivity and attenuated total reflectance (ATR) in combination with Fourier-transform infrared (FTIR) spectroscopy in mid IR spectra. Different methods of synthesis produced nanoparticles with different lattice constants, internal stresses and different cation inversion values. This is confirmed in the subtle changes in the Raman and IR spectra of different CoFe2O4 nano-powders. The Raman spectra of CoFe2O4 were compared with the spectra of other ferrites and some cubic oxide spinels in an attempt to evaluate the contribution of tetrahedral and octahedral oscillations in certain Raman modes.","PeriodicalId":21592,"journal":{"name":"Science of Sintering","volume":"45 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68811842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The influence of printing orientation on the flexural strength of PA 12 specimens produced by SLS 打印方向对SLS法制备pa12试样抗弯强度的影响

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos230508031j

Ivana Jevtic, G. Mladenović, Aleksa Milovanovic, Isaak Trajković, M. Djurkovic, Nenad Korolija, M. Milosevic

引用次数: 0

The effect of aging temperature and aging duration on the dry sliding wear behavior of Ti6Al4V alloy 时效温度和时效时间对Ti6Al4V合金干滑动磨损性能的影响

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos230524033a

S. Aksöz

引用次数: 0

Effect of glass powder on the friction performance of automotive brake lining materials 玻璃粉对汽车制动衬里材料摩擦性能的影响

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos211017006k

Hüsamettin Kuş, D. Altiparmak

引用次数: 0

Cobalt supported chitosan-derived carbon-smectite catalyst in Oxone® induced dye degradation 钴负载壳聚糖衍生的碳蒙脱石催化剂在Oxone®诱导染料降解

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos230427037s

G. Stevanović, N. Jović-Jovičić, A. Popovič, B. Dojčinović, A. Milutinović-Nikolić, P. Banković, M. Ajdukovic

{"title":"Cobalt supported chitosan-derived carbon-smectite catalyst in Oxone® induced dye degradation","authors":"G. Stevanović, N. Jović-Jovičić, A. Popovič, B. Dojčinović, A. Milutinović-Nikolić, P. Banković, M. Ajdukovic","doi":"10.2298/sos230427037s","DOIUrl":"https://doi.org/10.2298/sos230427037s","url":null,"abstract":"Catalytic degradation of tartrazine in the presence of Oxone? activated by a catalyst constituted of cobalt supported on a nanocomposite of smectite with chitosan-derived carbon was investigated. The catalyst was synthesized using cobalt impregnation followed by carbonization at 773 K in an inert atmosphere. The synthesized catalyst was previously fully characterized using appropriate characterization methods, including XRPD, XPS, FTIR, HR-TEM, and low-temperature N2-physisorption analysis. The catalytic experiments were performed by varying different experimental parameters (dye concentration, Oxone? concentration, temperature, and initial pH of the reaction solution). The kinetic and thermodynamic parameters were estimated from the experimental results. The kinetics data showed the best fit with the pseudo-first-order kinetics model. The activation energy of the investigated degradation process was calculated according to the Arrhenius equation. The catalyst showed excellent performance at low temperatures even at 298 K, and in the wide range of pH values.","PeriodicalId":21592,"journal":{"name":"Science of Sintering","volume":"1 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68812413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Morphological and structural characterization of MgAl2O4 spinel MgAl2O4尖晶石的形态和结构表征

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos2301001o

N. Obradović, S. Filipović, W. Fahrenholtz, B. Marinkovic, J. Rogan, S. Lević, Antonije Djordjevic, V. Pavlović

引用次数: 0

Characterization of NTC thick film thermistor paste Cu0.2Ni0.5Zn1.0Mn1.3O4 NTC厚膜热敏电阻浆料Cu0.2Ni0.5Zn1.0Mn1.3O4的表征

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos230608036a

S. Aleksic, N. Obradović, N. Mitrović, M. Lukovic

{"title":"Characterization of NTC thick film thermistor paste Cu0.2Ni0.5Zn1.0Mn1.3O4","authors":"S. Aleksic, N. Obradović, N. Mitrović, M. Lukovic","doi":"10.2298/sos230608036a","DOIUrl":"https://doi.org/10.2298/sos230608036a","url":null,"abstract":"A powder of Cu0.2Ni0.5Zn1.0 Mn1.3O4 composition for custom thermistor was prepared by using the respective mixture of metal oxides and solid state reaction at 1000 ?C/4h in air. The obtained thermistor powder was milled in the planetary ball mill and agate mill for a prolonged time to achieve submicron powder. The prepared thermistor powder was further characterized by using XRD and SEM techniques. After that, the thermistor powder was pressed into small disc-shaped samples and sintered at 1150 ?C/2h. The sintered samples were also characterized by using XRD and SEM. The main electrical properties such as nominal resistance R and thermistor exponential factor B were measured in the climatic test chamber. After that, the thick film paste was prepared using the same powder, an organic vehicle and a glass frit. The paste was printed on alumina substrate, dried at 150 ?C /30 min and sintered in air at 850 ?C /10 min in a hybrid conveyor furnace. Planar electrodes were printed on the sintered NTC thermistor layer using PdAg thick film paste. The electric properties of the sintered thick film thermistor were also measured in the climatic test chamber. The obtained results were used for development of novel self-heating thermistor applications.","PeriodicalId":21592,"journal":{"name":"Science of Sintering","volume":"1 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68812630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of sintering temperature on structure, physical, and optical properties of wollastonite based glass-ceramic derived from waste eggshells and waste soda-lime-silica glasses 烧结温度对废蛋壳和废钠石灰硅玻璃制备硅灰石基微晶玻璃结构、物理和光学性能的影响

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos230701041h

Chen Hongxu, R. Azis, M. Zaid, K. Matori, I. Ismail

{"title":"Influence of sintering temperature on structure, physical, and optical properties of wollastonite based glass-ceramic derived from waste eggshells and waste soda-lime-silica glasses","authors":"Chen Hongxu, R. Azis, M. Zaid, K. Matori, I. Ismail","doi":"10.2298/sos230701041h","DOIUrl":"https://doi.org/10.2298/sos230701041h","url":null,"abstract":"Calcium oxide from discarded eggshells and waste soda-lime-silica were utilized in this study to make wollastonite (CaSiO3) based glass-ceramics. The calcium oxide and silica were made using the melt-quenching process and sintered for 2 hours at 700 to 1000?C. The XRD data verified that the wollastonite crystalline peak appeared at high sintering temperatures, with crystalline phase values of 39.74%, 47.37%, and 48.91% as the sintering temperature increased at 800-1000?C, respectively. Additionally, crystalline size and phase have no obvious change at 800-1000?C, where the intensity has increased by the sintering temperature. The FTIR spectra revealed the wollastonite phase vibration at the wavelength of 501 cm-1, 650cm-1, 715cm-1, 808cm-1, 931cm-1, 2129 cm-1. Additionally, the FTIR spectral confirm the Si-O-Ca vibration band at the wavelength of 650 cm-1. For the optical sample, the value of indirect allowed transition with n=2 is the ideal value of the optical band gap based on a band gap rise from 3.89 to 4.23 eV with increasing sintering temperature. The value n=2 which is the indirect allowed transition is the optimal value of the optical band gap based on the value increase from 3.89-4.23 eV as the temperature increase. The synthesis approach introduced the low-cost method, recycle approach, simple and yet uses cheap starting materials for fabrication of wollastonite glass-ceramics product.","PeriodicalId":21592,"journal":{"name":"Science of Sintering","volume":"1 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68812870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0