Science of Sintering最新文献_第2页

The effect of acrylate on the properties and machinability of alumina ceramics 丙烯酸酯对氧化铝陶瓷性能和可加工性的影响

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos2301103k

Maja Kokunesoski, D. Janackovic, D. Kicevic, S. Ilić, A. Šaponjić

引用次数: 0

Extruded hot compacted alumix 431 powder - mechanical properties and microstructure 挤压热压铝431粉末。机械性能和显微组织

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos2301115s

S. Szczepanik, P. Nikiel

引用次数: 0

Modification of the Ni-NiO-oxidant system by thermo-chemical oxidation with accelerated growth of the p-type dielectric oxide layer, by the action of substituted V2O5 on the system 利用取代的V2O5对ni - nio氧化体系进行热化学氧化改性，加速了p型介电氧化物层的生长

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos230726049p

J. Purenovic, M. Purenovic

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

Characteristic energy and reduced mobility for Ne+ ions in CF4 gas CF4气体中Ne+离子的特征能量和迁移率降低

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos220620021n

Z. Nikitovic, Z. Raspopovic

引用次数: 0

The effect of insert surface roughness in part production with inserted powder injection molding method 采用粉末注射成形方法生产零件时，零件表面粗糙度的影响

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos2301089s

Kamran Samet, M. Subaşı, C. Karatas

引用次数: 0

Application of Fe-Al layered double hydroxides on silica for phosphate and arsenate removal from water 铁铝层状双氢氧化物在二氧化硅上去除水中磷酸盐和砷酸盐的应用

4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos230926051e

Adela Egelja, Andrija Savic, Marjetka Savic, Maja Kokunesoski, Krstimir Pantic, Milica Rancic, Marija Vuksanovic

{"title":"Application of Fe-Al layered double hydroxides on silica for phosphate and arsenate removal from water","authors":"Adela Egelja, Andrija Savic, Marjetka Savic, Maja Kokunesoski, Krstimir Pantic, Milica Rancic, Marija Vuksanovic","doi":"10.2298/sos230926051e","DOIUrl":"https://doi.org/10.2298/sos230926051e","url":null,"abstract":"In present study FeAl-LDH@SiO2 adsorbent was used for phosphate and arsenate removal from aqueous solutions. Silica, obtained from rice husks, was used as a substrate for the deposition of FeAl based layered double hydroxides (FeAl-LDH) particles. Synthesis of FeAl-LDH, obtained at Fe/Al molar ratio of 3:1, was performed via co-precipitation and concomitant deposition on SiO2 carrier at 1:1, 2:1, and 3:1 LDH/silica mass ratios. The prepared materials were characterized by scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), N2 adsorption/desorption isotherms (BET method) and Fourier transform infrared spectroscopy (FTIR). SEM analysis revealed uniform precipitate of LDH on SiO2 substrate, while XRD analysis confirmed crystallographic structure of LDH deposit. Optimization of adsorption properties of synthesized adsorbents confirmed best performances of FeAl-LDH@SiO2, obtained at 3:1 LDH/silica mass ratio. Thus, adsorption experiments were carried out with respect to adsorbent dosage, phosphate and arsenate concentration at initial pH 4. Phosphate concentrations were determined using spectrophotometer and arsenate concentrations were determined using atomic absorption spectrometer. The results showed that the maximum sorption capacities for phosphates was 62.2 mg g-1, and for arsenate was 59.0 mg g-1. Kinetic study confirmed intra-particle diffusion as rate-limiting step, while thermodynamic study indicates feasible and spontaneous process.","PeriodicalId":21592,"journal":{"name":"Science of Sintering","volume":"115 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":"135841218","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 boron addition on properties of copper-zirconium alloys 硼的加入对铜锆合金性能的影响

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos220421003s

M. Simić, J. Ružić, D. Božić, N. Stoymenov, S. Goshev, D. Karastoyanov, J. Stašić

{"title":"The influence of boron addition on properties of copper-zirconium alloys","authors":"M. Simić, J. Ružić, D. Božić, N. Stoymenov, S. Goshev, D. Karastoyanov, J. Stašić","doi":"10.2298/sos220421003s","DOIUrl":"https://doi.org/10.2298/sos220421003s","url":null,"abstract":"Copper-zirconium alloys with high conductivity were produced using powder metallurgy. Two-steps manufacturing process, containing mechanical alloying followed by hot pressing, was applied in achieving improved mechanical and physical properties of Cu-Zr alloy. In this paper, the influence of boron on Cu-Zr alloys properties was studied on Cu-1Zr (wt.%) and Cu-1.1Zr-0.3B (wt.%) systems. Scanning electron microscopy, laser nanoparticle sizer, computed tomography and X-ray diffraction were employed for observation of changes in the microstructure during production steps. More specifically - variations in size of the Cu particles, powder mixtures? structural parameters, and development of CuZr phase in binary alloy, CuZr phase and ZrB2 particles in ternary alloy were observed. It was shown that presence of boron increases dislocation density in ternary alloy over the mechanical alloying time compared to binary alloy. The results presented in this study show higher hardening effect in Cu-Zr- B alloy compared to Cu-Zr alloy, resulting in stable hardness values during thermomechanical treatment. Further, it can be seen that finely dispersed reinforcing ZrB2 particles in copper matrix does not have significant influence on its conductivity. Moreover, both systems Cu-Zr and Cu-Zr-B exhibit better electrical conductivity after thermomechanical treatment as a result of zirconium reduction in solid solution due to its precipitation.","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":"68809500","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

Application of pyrophyllite in high-temperature treated building materials 叶蜡石在高温处理建材中的应用

IF 1.5 4区材料科学

Science of Sintering Pub Date : 2023-01-01 DOI: 10.2298/sos220610014t

A. Terzic, M. Vasić, J. Stojanovic, V. Pavlovic, Z. Radojević

引用次数: 0