Science of Sintering最新文献

The microstructural representation and fractal nature intepolation analysis of feldspar 长石显微结构表征及分形性质内嵌分析

4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos230721050m

Dusan Milosevic, Ana Radosavljevic-Mihajlovic, Mimica Milosevic, Natasa Djordjevic, Bojana Markovic, Mirko Grubisic, Branislav Vlahovic

{"title":"The microstructural representation and fractal nature intepolation analysis of feldspar","authors":"Dusan Milosevic, Ana Radosavljevic-Mihajlovic, Mimica Milosevic, Natasa Djordjevic, Bojana Markovic, Mirko Grubisic, Branislav Vlahovic","doi":"10.2298/sos230721050m","DOIUrl":"https://doi.org/10.2298/sos230721050m","url":null,"abstract":"This paper presents a comparative analysis of microstructural parameters by the powder X-ray diffraction method on a polycrystalline sample and the fractal analysis. The presented results of microstructural parameters are obtained by crystallographic programs FullProf based on the Rietveld method. The synthetic Ba/Ca-celsian sample has been used for microstructural parameters analysis. The feldspar sample has been synthesized by the thermal induction phase transformation process of ion exchange Ca-LTA zeolite with Ba cation. After the ion exchange Ba/Ca-LTA, the sample was heated at the temperature of 1300?C and the structure of Ba/Ca-feldspar was determined by the X-ray powder diffraction analysis. The X and U shape parameters that contribute to the strain have been reconstructed by fractal interpolation. Once we can reconstruct the shapes, which are quantum mechanics effects, we should provide the data for predicting desired parameters mentioned previously. We reported in this paper the successful application of this advanced and deep microstructure analysis, which confirmed original fractal copies based on the presented morphology characterization.","PeriodicalId":21592,"journal":{"name":"Science of Sintering","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135650625","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

Processing of gelatine coated composite scaffolds based on magnesium and strontium doped hydroxyapatite and yttria-stabilized zirconium oxide 基于镁锶掺杂羟基磷灰石和钇稳定氧化锆的明胶包覆复合支架的制备

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos220723019g

Aleksa Galic, Tamara Matic, Natasa Obradovic, Z. Baščarević, Djordje Veljovic

{"title":"Processing of gelatine coated composite scaffolds based on magnesium and strontium doped hydroxyapatite and yttria-stabilized zirconium oxide","authors":"Aleksa Galic, Tamara Matic, Natasa Obradovic, Z. Baščarević, Djordje Veljovic","doi":"10.2298/sos220723019g","DOIUrl":"https://doi.org/10.2298/sos220723019g","url":null,"abstract":"Limited bone bank capacity and risk of infection are some of the main drawbacks of autologous and allogenic grafts, giving rise to synthetic materials for bone tissue implants. The aim of this study was to process and evaluate the mechanical properties and bioactivity of magnesium and strontium doped hydroxyapatite (HAp) scaffolds and investigate the effect of adding zirconium oxide and gelatine coating the scaffolds. Doped nanosized hydroxyapatite powder was synthesized by the hydrothermal method and the scaffolds were made by the foam replica technique and sintered at different temperatures. Yttria-stabilized zirconium oxide (YSZ), synthesized by plasma technology, was used as reinforcement of calcium phosphate scaffolds. Element analysis, phase composition, morphology of the powders and microstructure of the scaffolds were investigated, as well as the compressive strength of the coated and uncoated scaffolds and bioactivity in simulated body fluid (SBF). A microporous structure was achieved with interconnected pores and bioactivity in SBF was confirmed in all cases. The best mechanical properties were given by the coated composite HAp/YSZ scaffolds, withstanding average stresses of over 1019 kPa. These results encourage the idea of use of these scaffolds in bone regenerative therapy and bone tissue engineering.","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":"68810764","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

Deterioration characterization during thermal shock testing 热冲击试验中的劣化特性

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos2301071m

Sanja Martinović, M. Vlahović, T. Volkov-Husović

引用次数: 0

Cross section sets and transport parameters for Ar+ ions in CF4 gas CF4气体中Ar+离子的截面设置和输运参数

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos230326038n

Z. Nikitovic, Z. Raspopovic

引用次数: 0

An examination of microstructure, microhardness and tribological properties of ceramic reinforced bronze matrix composite materials 陶瓷增强青铜基复合材料的显微组织、显微硬度和摩擦学性能研究

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos230414042a

H. Ada, Emine Türkmen, Y. Kaplan, Elif Özçatalbaş, Ender Şatir, S. Aksöz

{"title":"An examination of microstructure, microhardness and tribological properties of ceramic reinforced bronze matrix composite materials","authors":"H. Ada, Emine Türkmen, Y. Kaplan, Elif Özçatalbaş, Ender Şatir, S. Aksöz","doi":"10.2298/sos230414042a","DOIUrl":"https://doi.org/10.2298/sos230414042a","url":null,"abstract":"In order to obtain better mechanical properties in a bronze alloy, it is important to produce new materials by adding reinforcements and to offer these materials to the industry. In this study, bronze matrix (Cu10Sn) materials were reinforced with boron carbide (B4C) and silicon carbide (SiC) ceramic materials by using the mechanical alloying method. New composite materials were produced by powder metallurgy method by adding ceramic reinforcement (B4C and SiC) at 1, 2, 4 and 8 weight ratios to Cu10Sn alloy, which is the main matrix material. The obtained composite materials examined in terms of structural, microhardness and wear resistance. Coefficient friction, specific wear rate and volume loss rates under 5N, 10N, and 15N loads were examined for the samples produced. When the applied microhardness and wear behaviors were examined, it was generally seen that the hardness and wear behaviors were improved with the added reinforcement ratios. In line with the examinations made, based on the hardness and wear processes applied to the materials consisting of the bronze matrix of the reinforcement material, it was observed that the most appropriate results were obtained from composite materials (Alloy 4 and Alloy 8), which contain 4% B4C and SiC reinforcement.","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":"68812153","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

Effect of Cr limits on microstructure and mechanical properties of P/M 316l austenitic steel Cr极限对P/ m316l奥氏体钢组织和力学性能的影响

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos230526048e

M. Erden, Hüseyin Demirtaş, Hussein Oleiwi

引用次数: 0

The effects of hot rolling process on mechanical properties, corrosion resistance, and microstructures of Mo-Ni alloyed steels produced by powder metallurgy 热轧工艺对粉末冶金Mo-Ni合金钢力学性能、耐蚀性和显微组织的影响

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos230625040e

Rajab Elkilani, H. Çuğ, Akif Erden

{"title":"The effects of hot rolling process on mechanical properties, corrosion resistance, and microstructures of Mo-Ni alloyed steels produced by powder metallurgy","authors":"Rajab Elkilani, H. Çuğ, Akif Erden","doi":"10.2298/sos230625040e","DOIUrl":"https://doi.org/10.2298/sos230625040e","url":null,"abstract":"This study examined the effects of hot rolling on the microstructure, tensile strength, and corrosion behaviors of three different alloy steels made by powder metallurgy: Fe-0.55C, Fe-0.55C-3Mo, and Fe-0.55C-3Mo-10Ni. 700 MPa pressure was applied to press the particles. The cold pressed samples were sintered in a mixed-gas atmosphere (90% nitrogen, 10% hydrogen) at 5?C/min up to 1400?C for 2 hours. Then, the produced steels were hot rolled with a deformation rate of 80%. The microstructures show that deformed Mo and Mo-Ni steels have finer microstructures, better mechanical properties than undeformed Mo and Mo-Ni steels, and MoC, MoN, or MoC(N) was formed in the Mo-Ni steels. The highest mechanical properties were obtained in rolled steel samples containing Mo-Ni, followed by rolled Mo steel and rolled carbon steel samples, and then unrolled samples. Additionally, Tafel curve analysis demonstrated that alloy corrosion resistance rose as Ni concentration increased. It has also been observed that the hot rolling process improves corrosion resistance. The increase in the density value with the rolling process emerged as the best supporter of corrosion resistance.","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":"68812771","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

Effect of Ni:Si ratio on microstructure and properties of powder metallurgical Corson alloy Ni:Si比对粉末冶金Corson合金组织和性能的影响

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos230329026a

M. Akkaş, H. Atapek, Ş. Polat

引用次数: 0

Novel basalt-stainless steel composite materials with improved fracture toughness 断裂韧性提高的新型玄武岩-不锈钢复合材料

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos220429002p

V. Pavkov, G. Bakić, Vesna Maksimovic, I. Cvijović-Alagić, D. Bučevac, B. Matović

{"title":"Novel basalt-stainless steel composite materials with improved fracture toughness","authors":"V. Pavkov, G. Bakić, Vesna Maksimovic, I. Cvijović-Alagić, D. Bučevac, B. Matović","doi":"10.2298/sos220429002p","DOIUrl":"https://doi.org/10.2298/sos220429002p","url":null,"abstract":"This paper presents the technological process for obtaining basalt-stainless steel composite materials and testing their physical and mechanical properties. The phases of the technological process consist of: milling, homogenization, pressing, and sintering to obtain composite materials with improved fracture toughness. Andesite basalt from the deposit site \"Donje Jarinje\", Serbia, was used as a matrix in the composites, while commercial austenitic stainless steel 316L in the amount of 0-30 wt.% was used as a reinforcement. Although the increase of 316L amount caused a continuous decrease in the relative density of sintered samples, the relative density of sample containing 30 wt.% of 316L was above 94%. The 316L grains, which possess a larger coefficient of thermal expansion than the basalt matrix, shrinking faster during cooling from sintering temperature resulting in the formation of compressive residual stress in the basalt matrix surrounding the spherical steel grains. The presence of this stress activated toughening mechanisms such as crack deflection and toughening due to compressive residual stress. The addition of 20 wt.% of reinforcing 316L particles increased the fracture toughness of basalt by more than 30%. The relative density of these samples was measured to be 97%, whereas macrohardness was found to be 6.2 GPa.","PeriodicalId":21592,"journal":{"name":"Science of Sintering","volume":"25 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68809545","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

Changes in the physicochemical properties of geopolymer gels as a function of NaOH concentration 地聚合物凝胶的物理化学性质随NaOH浓度的变化

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos220624020n

M. Nenadovic, M. Ivanović, Danilo Kisić, N. Bundaleski, V. Pavlović, Sanja Knežević, Ljiljana M. Kljajević

{"title":"Changes in the physicochemical properties of geopolymer gels as a function of NaOH concentration","authors":"M. Nenadovic, M. Ivanović, Danilo Kisić, N. Bundaleski, V. Pavlović, Sanja Knežević, Ljiljana M. Kljajević","doi":"10.2298/sos220624020n","DOIUrl":"https://doi.org/10.2298/sos220624020n","url":null,"abstract":"In the present paper, polymerization of alkali activated metakaolin (MK) and its structural changing, using 2M NaOH, 8M NaOH, and 16M NaOH solutions were followed by means of X-ray photoelectron spectroscopy (XPS), Diffuse reflectance infrared Fourier transform spectroscopy (DRIFT), Raman spectroscopy and Scanning electron microscopy (SEM). XPS analysis revealed that changing of NaOH concentration did not affect the types of formed bonds in the material. At the same time, the amount of sodium and aluminum increased with the NaOH molarity. The latter steps could be especially interesting because it may indicate the possibility of 'dosing' the amount of Al incorporated by changing the NaOH concentration in the solution. DRIFT analysis revealed that the absorption band for AlIV located at 800 cm-1 is shifted towards the smaller values. Changing the concentration of NaOH, the chemical content did not change, but the structural changes are observed. Raman spectroscopy detected that the most dominant peaks at ?400 cm-1 and 519 cm-1 originate from Si-O-Al and Si-O-Si bending modes. With increasing the NaOH concentration, peaks at 1019-1060 cm-1 become more prominent as a result of polymerization. Both analyzes (DRIFT and Raman) confirmed the presence of quartz. SEM analysis showed that different structures are created by changing the concentration of NaOH.","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":"68810428","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