Hps Sintering Process
Microstructure and properties of 50Si50Al alloy fabricated by HPS …
Microstructure and properties of 50Si50Al alloy fabricated by HPS process using overspray powders. G. Mi School of Materials Science and EngineeringHenan Polytechnic University ... The compactness does not increase as the sintering time, and the anomalous growth of grain exist in the specimens while the sintering time is >120 …
Preparation of 3D printed silicon nitride bioceramics by …
Compared with MS sintering technology, in the case of GPS and HPS sintering technology, there are obvious impurities in the silicon nitride grain boundaries. These impurities are high-temperature liquid phase substances generated by the joint action of silicon nitride materials and additives during the sintering process 9, 14. These high ...
Study on Mechanical and Electrical Properties of High …
The uniform dispersion of high-content CNTs in Cu matrix was achieved by ball milling, sintering and rolling, and the processes did not cause more damage to the CNTs. The properties of composites prepared by spark plasma sintering (SPS) and vacuum hot pressing sintering (HPS) were compared, and the optimum process …
Solid Phase Sintering
As shown in Fig. 3, plenty of novel sintering techniques for the solid-phase sintering process have been developed, such as hot-pressing sintering (HPS) [11,31], cold-pressing sintering (CPS) [32–34], spark plasma sintering (SPS) [35,36], and microwave sintering (MWS) [37–39]. Among them, the SPS, a rapid sintering process, can ...
Application of the Hybrid Pelletized Sinter (HPS) process at …
Hybrid Pelletized Sinter (HPS process) has been developed in order to achieve both using a large amount of fine ores which cannot be used in ordinary sinter process and improving qualities of the ...
Preparation of millimeter-scale hard layer on the surface of …
Fortunately, the hot pressing sintering (HPS) in powder metallurgy process is also expected to fabricate the millimeter-scale surface strengthening layer by adjusting the amount of powder on the surface. This method can make the two materials directly contact through the powders, and finally sintering densification is achieved at a certain ...
Iron Ore Sintering: Process
Sintering is a thermal agglomeration process that is applied to a mixture of iron ore fines, recycled ironmaking products, fluxes, slag-forming agents, and solid fuel (coke). The purpose of the sintering process is manufacturing a product with the suitable characteristics (thermal, mechanical, physical and chemical) to be fed to the blast furnace.
HPS Process
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Effect of LaH3 additive on microstructures and hydrogen …
Hydride-Powder-Sintering(HPS) was applied in the V-based alloy successfully. • LaH 3 significantly improved the hydrogen storage performances of V 40 Ti 26 Cr 26 Fe 8. • Hydrogen desorption plateau was improved effectively by HPS process optimization. • HPS can be extended to be applied in other types of hydrogen storage …
RECENT PROGRESS OF HYBRID PELLETIZED SINTER …
ln HPS process to increase in production under the constant suction oondition, it is necessary to take measures shown in Table 1(1)_ The oonc:ept which is the sarne as the ordinary sintering process is basically applicable to HPS proc:ess. lmprovement of penneability in sinter bed is required to raise the sintering speed.
Microstructure and properties of 50Si50Al alloy fabricated by HPS …
The hot pressed sintering process of Si-Al alloy is researched and determined in this paper. Researched results show that the optimum process is as follows: the pressure is 30 MPa, the temperature ...
Prediction of Sinter Properties Using a Hyper-Parameter …
To utilize the iron ore fines in plants, Nippon Kokan Keihin company (presently, JFE Steel Corporation) developed the HPS process. 4 Investigators have tried to improve the utilization of iron ore fines in sinter beds by making HPS. 5,6 The HPS process is a modified form of the conventional sintering process. In this HPS …
Prediction of Sinter Properties Using a Hyper-Parameter …
Corporation) developed the HPS process.4 Investigators have tried to improve the utilization of iron ore finesin sinter beds by making HPS.5,6 The HPS process is a modifiedform of the conventional sintering process. In this HPS process, iron ore finesare pelletized to produce micro pellets. Green micro-
Hybrid Process Of Iron Ore Agglomeration: A Brief Review
The Hybrid Pelletized Sinter (HPS) is a agglomeration process that involves the combination of conventional sintering and pelletizing techniques and can be used with the purpose of obtaining improvements in the agglomeration stage of iron ore, and one of the great advantages of the process is the use of a wide particle size range of the ore. …
Hydrogen permeation of TiN–graphene membrane by hot press sintering
Hydrogen permeation of TiN – graphene membrane by hot press sintering (HPS) process K.- I. Kim, T.-W. Hong ⁎ Department of Material Science Engineering/Research Center of Sustainable Eco-Devices and Materials(ReSEM), Korea National University of Transportation, 50 Daehak-ro, Chungju, Chungbuk, 380 ‐ 702, Republic of Korea …
Preparation of 3D printed silicon nitride …
In addition, due to the high sintering temperature of Si 3 N 4 materials, traditional sintering preparation methods such as gas pressure sintering (GPS) and hot press sintering (HPS) are ...
In-situ 3D visualizations of microstructural evolution during …
The sintering process refers to the bonding of particles, which occurs through the development of sintering necks at the contacts between particles on the micro-scale. ... An in-situ HPS sintering device that can be coupled to a laboratory X-ray microscope has been developed in this study. With the help of this device, in-situ 3D visualizations ...
Microstructure and Mechanical Properties of AlSiTiCrNiCu …
Three groups of AlSiTiCrNiCu high entropy alloy (HEA) particles reinforced Al606l composites were fabricated by spark plasma sintering at 520 and 570 °C (S520, S570) and by hot-pressed sintering ...
Revealing strengthening contribution of grain refinement …
MA and SD HEA powders were formed by vacuum hot-pressing sintering (HPS) at 1000 °C and 50 MPa axial pressure for 50 min in graphite mold. The corresponding bulk HEAs were termed as HPS-MA25, HPS-MA30, HPS-MA35, HPS-MA40, and HPS-SD, respectively. ... The grain size of the HPS-MA40 HEA sample with a …
Study on Mechanical and Electrical Properties of High …
The properties of composites prepared by spark plasma sintering (SPS) and vacuum hot pressing sintering (HPS) were compared, and the optimum process …
Synthesis and gyromagnetic properties of highly-dense …
During the sintering process, putting external pressure can effectively reduce energy barrier of densification, which made the HPS samples had higher relative density (ρ r >98.0 %) than TS samples. Secondly, SEM images revealed that the synergistic effect of applied pressure and zero holding time can restrain the growth of crystal grain …
Microstructures and mechanical properties of in situ …
Subsequently, the alloy powders were pressed into green compacts with a cylindrical shape of 10 mm in diameter and 8 mm in height using a tablet press for high-pressure sintering (HPS). The HPS process was performed on an apparatus with six tungsten carbide anvils. A schematic sample assembly for the HPS experiment is shown …
Microstructure, Mechanical Properties and …
Nb-Si based ultrahigh-temperature alloys with the composition of Nb-22Ti-15Si-5Cr-3Al (atomic percentage, at. %) were prepared by hot press sintering (HPS) at 1250, 1350, 1400, 1450 and …
In-situ hot pressing sintering behaviors of Y2O3-La2O3
In pressureless sintering process, it was reported that some additives such as Y 2 O 3 were used as sintering aids to increase the sintering activity of AlON ceramic [7]. So far, a little work has been reported for the …
Prediction of Sinter Properties Using a Hyper-Parameter …
To utilize the iron ore fines in plants, Nippon Kokan Keihin company (presently, JFE Steel Corporation) developed the HPS process. 4 Investigators have …
Study of the hot-pressing sintering process of …
The optimization of plasma sintering process parameters (sintering temperature, pressure and holding time) to obtain high tc diamond/copper composites was reported by wang et al. [38]. The TC of the composite reached a maximum of 258.04 W/m·K at 900 °C, 60Mpa and 40 min sintering process parameters. In addition, some …
Dielectric Properties and Impedance Spectroscopy of Pb (Mg
The sintering step of the HPS process was described in detail in our previous article (Ref 15). The sintering process parameters for high temperature and high pressure are sintering pressure of 5.5 GPa, sintering temperature of 1000 °C, and holding time of 10 minutes. The resultant samples are then further annealed in air for 10 hours …
Preparation of the close cross-section component of NiAl …
To address this problem, a combined sintering process based on HPS is proposed in this study, which divides closed cross-section components with thin or complex shapes into multiple parts and compacts them sequentially. Based on this method, the uneven density defects occurring in the HPS were inhibited, and several typical close …
Reactive hot pressing and sintering characterization of …
The reactive synthesis route, microstructure and properties of ZrB 2 –SiC–ZrC composites prepared from a mixture of Zr/B 4 C/Si powders via reactive hot pressing were investigated. The reactions of the Zr/B 4 C/Si system commenced at 800. °C and completed after a 60 min hold at 1700 °C in argon atmosphere.. The reacted …
In-situ hot pressing sintering behaviors of Y2O3-La2O3
The relative density of Y 2 O 3-La 2 O 3 co-doped and undoped AlON ceramic sintered by HPS as a function of sintering temperature is shown in Fig. 3.The relative density of undoped AlON ceramic increased with the increasing of the sintering temperature, whereas it initially increased and then had no obvious change after 1600 …
Evaluations of hydrogen permeability on …
TCN–50 wt.%Pd/Ag, too, is denser than the membrane after CIP process only due to sintering that leads to more condensed particles.Hydrogen permeability of TCN–Ni membrane after CIP process and that of TCN–Ni membrane after HPS process is shown in Fig. 3: the permeability is 2.04 × 10 −5 mol/m s Pa 1/2 for the former, and 1.53 …
Transient liquid phase bonding assisted spark plasma sintering …
Fig. 2 shows the Rietveld refinement results of the XRD patterns of the HPS and SPS specimens. Compared to the optimized LaFe 11.8 Si 1.2 strip-casting flakes [50], in the HPS as well as the SPS samples, the content of the 1:13 phase decreased from ∼89 wt% to ∼81 wt%, the α-Fe content increased from ∼11–18 wt%, and a small amount of …
Hot Pressing (HP) Sintering Process for Ceramic Materials …
Hot pressing(HP) sintering process is the most commonly used technique for fabricating dense, non-oxide monolithic ceramics and their composites. During hot pressing sintering, temperature and pressure are simultaneously applied to the powder compact contained in a die. Under the application of pressure, the contact points between particles ...
Iron Ore Sintering: Process: Mineral Processing and …
Sintering is a thermal agglomeration process that is applied to a mixture of iron ore fines, recycled ironmaking products, fluxes, slag-forming agents, and solid fuel (coke). The purpose of the sintering process is manufacturing a product with the suitable characteristics (thermal, mechanical, physical and chemical) to be fed to the blast furnace.
Edge Deep Learning Towards the Metallurgical Industry
Studies on the influence of raw materials in the cold agglomeration process of the HPS process were also studied, ... Alcantara Domingues, A.L.: An image analysis system for automatic characterisation of iron ore sintering quasiparticles. Mineral Process. Extract. Metallurgy 1–9 (2019)
Transient liquid phase bonding assisted spark plasma sintering …
The poor mechanical properties of La-Fe-Si based alloys restrict the potential of these magnetocaloric materials. Hence, a novel transient liquid phase bonding (TLPB) processing technique was deployed during spark plasma sintering (SPS) of La-Fe-Si based bulk materials. A series of binder-free LaFe 11.8 Si 1.2 bulk materials were …
Microstructure, Mechanical Properties and Oxidation …
The density of the sintered alloys is closely related to the in situ reaction during the sintering process. Increasing the sintering temperature can promote the in situ reaction in the milled powders to form intermetallic compounds, as has been proved by the XRD patterns in Figure 1 and microstructure in Figure 2. Therefore, a higher HPS ...
Study on Mechanical and Electrical Properties of High …
The properties of composites prepared by spark plasma sintering (SPS) and vacuum hot pressing sintering (HPS) were compared, and the optimum process parameters of SPS were determined. When the CNTs' content is 2 wt.%, the hardness is 134.9 HBW, which is still 2.3 times that of pure Cu, and the conductivity is the highest, …
Effect of sintering techniques on the microstructure of …
Although the sintering temperature of SPS SiC was the lowest among the three ceramics, localized high temperature would perhaps result during the sintering process because of the pulse current, which would in turn cause the increased growth of grains. As a result, HPS SiC exhibited the smallest average grain size with a medium …