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No.169, Science (Kexue) Avenue,National HI-TECH Industry Development Zone, Zhengzhou, China
[email protected]
0086-371-86549132
The sintering process is usually divided into stages based on geometrical changes that occur during the microstructural evolution from an assembly of individual particles to a dense, polycrystalline structure. The microstructural evolution during the sintering process has generally been divided into three stages.
The sintering process is governed by the following parameters: • temperature and time, • geometrical structure of the powder particles, • composition of the powder mix, • density of the powder compact, • composition of the protective atmosphere in the sintering furnace.
Results: Simulation of Microstructural Evolution during Sintering Time, t = 0 MCS t = 2,000 MCS t = 50,000 MCS Digitized images can be mined for many types of data Vacancy anihilation: “jump” and “shift” algorithms. Diffusion mass transport Vacancy anihilation Potts Model
Feb 01, 2004 · The temperature evolution and the formation of the sintered part are simulated by a 3D finite element analysis based on continuous media theory. It is shown that the effect of sintering has a strong influence on thermal evolution through changing the thermal properties of the material.
Microstructure evolution in two-step-sintering process toward transparent Ce:(Y,Gd)3(Ga,Al)5O12 scintillation ceramics Journal of Alloys and Compounds ( IF 5.316) Pub Date : 2020-12-01, DOI: 10.1016/j.jallcom.2020.156377
Jul 12, 2017 · The sintering process was interrupted 15 times in order to capture two CT scans each time (an absorption scan and a DCT scan). ... Holzner, C., Lauridsen, E.M. et
Oct 24, 2016 · We recently developed a novel technique of cold sintering process (CSP) to obtain dense ceramics at extraordinarily low temperatures. In this communication, we demonstrate the feasibility of applying CSP to zirconia-based ceramics. As exemplified by 3Y-TZP ceramics, a significantly enhanced densification evolution is observed.
高达10%返现 · Dec 04, 2017 · Understanding the mechanisms behind the densification and microstructural evolution during the sintering process is of immense importance to evaluate the usability and performance of the final sintered materials in various applications. Conventionally, sintering process has been studied through experiments.
Sintering or frittage is the process of compacting and forming a solid mass of material by heat or pressure without melting it to the point of liquefaction.. Sintering happens naturally in mineral deposits or as part of a manufacturing process used with metals, ceramics, plastics, and other materials.The atoms in the materials diffuse across the boundaries of the particles, fusing the ...
Jan 01, 2009 · 高达10%返现 · Liquid phase sintering (LPS) is a process for forming high performance, multiple-phase components from powders. It involves sintering under conditions where solid grains coexist with a wetting liquid. Many variants of LPS are applied to a wide range of engineering materials. Example applications for this technology are found in automobile engine connecting rods
model to simulate the bubble evolution in sintering process was introduced. It was . shown . that in fast heating rate, bubbles expand and . can . join each other to make bigger .
Jan 22, 2018 · In a previous work, the methodology for constructing the master sintering curve (MSC) was applied to dilatometry data obtained for nanostructured GDC to preview its density evolution . In this work, the sintering process of GDC compacts prepared with powders within a wide range of specific surface area is investigated by dilatometry.
Microstructure evolution in two-step-sintering process toward transparent Ce:(Y,Gd)3(Ga,Al)5O12 scintillation ceramics Journal of Alloys and Compounds ( IF 5.316) Pub Date : 2020-12-01, DOI: 10.1016/j.jallcom.2020.156377
PII: S 0 9 2 7 - 0 2 5 6 ( 0 2 ) 0 0 2 7 1 - 9 B. Zhang, M.M. Gasik / Computational Materials Science 25 (2002) 264–271 265 are necessary to know for better understanding of The volumetric sintering strain increment is gi- the reason of sintering defects, and to optimise the ven as in [9]: sintering process.
Sintering in compacted powders of Mo, Nb, Ta, and alumina is investigated using small angle neutron scattering. The scattering data permits to follow the evolution of the total pore surface F ...
Sep 14, 2021 · This general pathway (second phase precipitation facilitating more rapid mass transport) is conceptually similar to what happens in liquid phase sintering and supersolidus liquid phase sintering, [3,4,5,6,7,8,9,10] but importantly, in NPSS all of this structural evolution occurs completely in the solid state. NPSS therefore avoids the slumping ...
Results: Simulation of Microstructural Evolution during Sintering Time, t = 0 MCS t = 2,000 MCS t = 50,000 MCS Digitized images can be mined for many types of data Vacancy anihilation: “jump” and “shift” algorithms. Diffusion mass transport Vacancy anihilation Potts Model
Feb 20, 2018 · The morphology and evolution of magnetic properties in multisample sintering (MSS) of yttrium iron garnet (Y3Fe5O12, YIG) and single-sample sintering (SSS) of nickel zinc ferrite (Ni0.6Zn0.4Fe2O4, NZF) were studied in detail, focusing on the parallel evolving relationship with their dependences on sintering temperature. Sintering is an important process in ferrite fabrication which
Compared to furnace sintering, the induction sintering process requires sig- B. Microstructural Analysis of As-Sintered Material nificantly less time to achieve a similar degree of Analyzing the microstructure of the samples sintered homogenization and properties of sintered materials. at temperatures of 1000 C and 1100 C, the undissolved This ...
Jan 01, 2009 · Liquid phase sintering (LPS) is a process for forming high performance, multiple-phase components from powders. It involves sintering under conditions where solid grains coexist with a wetting liquid. Many variants of LPS are applied to a wide range of engineering materials. Example applications for this technology are found in automobile engine connecting rods and high-speed metal
Processes of sintering of silicon carbide nanopowder were investigated. Values of density ( g/cm 3) and strength ( MPa) were obtained. Within the theory of dispersed systems, the temperature evolution of the materials structure was considered. The relationship between sintering temperature, characteristics of crystal structure and physical ...
grain growth and microstructure evolution of alumina ceramics during two step sintering process To cite this article: U. A. Khan et al 2016 IOP Conf. Ser.: Mater. Sci. Eng. 146 012046 View the article online for updates and enhancements. Related content Selective laser melting of titanium alloy: investigation of mechanical properties and ...
Dear Colleagues, We aim to publish a Special Issue of the journal Minerals that presents a set of themed articles on the “Evolution and Modeling of Iron Ore Sintering Process”. The main focus will be on the actual status and developments of the iron ore sintering process and discussing new insights into ongoing technologies with potential for integration and sustainable approaches, from ...
Dec 04, 2017 · Understanding the mechanisms behind the densification and microstructural evolution during the sintering process is of immense importance to evaluate the usability and performance of the final sintered materials in various applications. Conventionally, sintering process has been studied through experiments.
The sintering process may be divided into three stages based upon the dominant geometric process which is occui-ring: Stage 1 points of contact broaden into weld PAGE 30 16 necks; Stage 2 continuous channels'of porosity begin to pinch off, isolating regions of porosity; and Stage 3 large isolated pores grow at the expense of smaller pores.
The sintering trajectory in niobium: evolution of the incident neutron wavelengths between 5 and 8/~. ... It is well population of voids described by the smaller charac- known that the sintering process sets in by rounding teristic length has completely vanished while the the cusped voids forming during the agglomeration of population of ...
However, the sintering behavior during the sintering process is hard to be recorded because the sintering time is too short. Therefore, there is a need of an effective model to simulate the sintering process and predict the resultant properties. Forerunners developed many molecular dynamics (MD) models to simulate the sintering process.
Sintering and accompanying microstructural evolution is inarguably the most important step in the processing of ceramics and hard metals. In this process, an ensemble of particles is converted into a coherent object of controlled density and microstructure at an elevated temperature (but below the melting point) due to the thermodynamic tendency of the particle system to decrease its total ...
Structural Evolution of Silicon Carbide Nanopowders during the Sintering Process GalinaVolkova,OleksandrDoroshkevych,ArtemShylo,TetyanaZelenyak, ValeriyBurkhovetskiy,IgorDanilenko,andTetyanaKonstantinova Donetsk Institute for Physics and Engineering named ae r O.O. Galkin, NAS of Ukraine, R. Luxembourg Street,, Donetsk , Ukraine
Sintering is a common process during which nanoparticles and microparticles are bonded, leading to the shrinkage of interstitial pore space. Understanding morphological evolution during sintering ...
Compared to furnace sintering, the induction sintering process requires sig- B. Microstructural Analysis of As-Sintered Material nificantly less time to achieve a similar degree of Analyzing the microstructure of the samples sintered homogenization and properties of sintered materials. at temperatures of 1000 C and 1100 C, the undissolved This ...
Aug 18, 2021 · This work demonstrates that flash sintering is a facile, effective, energy-efficient, and attractive strategy for improving the hydrogen evolution activity of an oxysulfide photocatalyst. See the supplementary material for the details on photocatalyst preparation, characterization, photocatalytic hydrogen evolution test, and computational ...
Apr 05, 2020 · recrystallization, sintering), they are not practical for rapid exploration of the process design space due to their high demand for computational resources. The extraction of reliable and robust reduced-order models from the micro-structure evolution datasets produced by such sophisticated physics-based models continues to be an unsolved problem.
In this paper, a mathematical model for simulating the grain evolution process of ceramic materials was constructed to investigate the effects of the sintering parameters on the microstructure in ...
This work compared the densification behavior and pores evolution of two kinds of samples (15% and 35% initial porosity stainless steels parts) prepared by selective laser sintering. The results show that post microwave sintering process results in an increase of the density of sample. At the low sintering temperature (1200°C, 1300°C), the low porosity can lead to high density in the final ...
Mar 01, 2018 · The iron ore sintering process is the second most energy-consuming process in iron and steel production, where the main energy consumption results from the combustion of carbon. In order to optimize the utilization of carbon, it is necessary to predict the carbon efficiency first. Thus, this paper develops a multilevel prediction model to predict the carbon efficiency. First, the comprehensive ...
Ruthenium tablets with mean grain size of ~4–5 μm were prepared by vacuum hot pressing (VHP), and tablets with maximum density of 12.2 g cm–3 were obtained with sintering time of 2 h. X-ray diffraction (XRD) revealed that there was a texture change with sintering time. The microstructure of the ruthenium tablets was observed by electron backscatter diffraction (EBSD) and field emission ...
Densification and Structural Evolution in Spark Plasma Sintering Process of Mechanically Alloyed Nanocrystalline Fe-23Al-6C Powder. Yuichiro Koizumi, Takanori Tanaka, Yoritoshi Minamino, Nobuhiro Tsuji, Kiyoshi Mizuuchi, Yoshihira Ohkanda. Materials Processing and Characterization Division;
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