Recent Developments of High-Pressure Spark …
— Spark plasma sintering (SPS), also called pulsed electric current sintering (PECS) or field-assisted sintering technique (FAST) is a technique for sintering powder under moderate uniaxial...
Densification mechanisms during high-pressure sintering of
— The HPS process involves distinct stages: cold compaction, hot compaction, and isothermal progression. During cold compaction, densification is driven by the …
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 ...
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 at 570 °C(H570). The AlSiTiCrNiCu (AST) particles used as reinforcements were synthesized by mechanical alloying. The influences of the …
What is Sintering in Manufacturing?
— The Sintering Process. Sintering works in a three-stage process: A primary part powder blend, with a bonding agent, is formed into a desired shape. The bonding agent sticks the powder together to make …
Prediction of Sinter Properties Using a Hyper-Parameter …
— The present ANN-based study correlates two sintering processes (conventional sintering and HPS) in a unified model. In varying percentages, the layered and nonlayered samples were tested for sinter development with varying basicity and …
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 process, iron ore …
Interface Evolution and Mechanical Properties of the Solid …
— The Mg-7Gd-4Y-2Zn-0.4Zr scraps were solid state recycled through hot pressing sintering (HPS) and spark plasma sintering (SPS). Rotary extrusion with different parameters were conducted on the homogenized, hot-pressed sintered and spark plasma sintered alloy. ... For the HPS process, the scraps were loaded into the mold, and the …
(PDF) Preparation of millimeter-scale hard layer on …
— with hot pressing sintering (HPS) process. The thickness of the surfac e layer reached 1.1 mm, far exceeding the strengthening layer prepared by the traditional surface modi-
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 …
Enhancing the microstructure and mechanical properties of …
— Owing to the process characteristics of solid-state synthesis, hot press sintering (HPS) has become the preferred process for HEA fabrication [[13], [14], [15]]. Sakar E et al. optimized the hot-pressing sintering process to endow it with advantages such as a wide processing range, high raw material utilization, and low production costs …
Mixing and Pelletizing Process in Sinter Production | MAXTON
— HPS (Hybrid Pelletized Sinter, two-stage drums one-stage disc) mixing and pelletizing process. HPS mixing pellet sintering, belonging to the mini pellet sintering …
In-situ 3D visualizations of microstructural evolution during …
In this study, we developed an in-situ hot-pressing sintering (HPS) device that can be coupled to a laboratory X-ray microscope, offering laboratory-available observation of …
Perspectives on the spark plasma sintering process
— In sintering, the historical trend of the utilization of an electric current to activate the process continued followed the early work of Bloxam [] with a number of US and British patents issued from the 1910s to the 1940s.In the work described by these patents, the current was used to sinter refractory metals [38, 39], refractory carbides and …
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.
Rapid liquid phase–assisted ultrahigh-temperature sintering …
— Various strategies have been investigated to improve the densification of the composites. For example, approaches that elevate the treatment temperature to above the melting point, such as arc melting (29–31), or by exerting an external pressure, such as hot pressing (32–34), can ameliorate the casting or sintering results of these ultrahigh …
Sintering
— The sintering process can be defined as a thermal agglomeration process that is applied to a mixture of iron ore fines, recycled ironmaking products, ... Additionally, different alternatives to the sintering and pelletizing techniques are described: HPS process, hybrid pelletized sinter; MEBIOS, mosaic embedding iron ore sintering; and, CAP ...
Mixing and Pelletizing Process in Sinter Production | MAXTON
— HPS (Hybrid Pelletized Sinter, two-stage drums one-stage disc) mixing and pelletizing process. HPS mixing pellet sintering, belonging to the mini pellet sintering process, mixes iron ore fines, return fines, fluxes, and fuel with water to form mini pellets with a diameter of 5-10mm. These mini pellets are coated with a certain proportion of ...
Microstructure, Mechanical Properties and …
— Temperature is an important parameter in the HPS process. Sintering is a temperature-controlled thermal activation process. As the temperature increases, the temperature-related rate factor (e.g., …
Recent Developments of High-Pressure Spark Plasma Sintering…
— sintering process. Zhang et al. [2] have shown first evidence for the occurrence of a spark . Citation: Le Godec, Y.; Le Floch, S. Recent Developments of . High-Pressure Spark Plasma .
High Pressure (HP) in Spark Plasma Sintering (SPS) …
— The equipment of UHP-SPS and HP-SPS elements (pistons + die) conductivity of the non-graphite mold define a Hot-Pressing process. This study presents the results showing the ability of sintering diamond …
Fundamentals of Spark Plasma Sintering (SPS): An Ideal
— Due to the pulsed electric current and the spark plasma effect, the SPS process is capable of introducing simultaneous rapid heating and cooling rates; …
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 ...
In-situ 3D visualizations of microstructural evolution during …
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 of the microstructural evolution of 7055 aluminum alloys during the HPS process were conducted.
Hybrid pelletized sinter-A new hope for non-conventional sintering process
— In December 2002, Companhia Siderurgica Belgo-Mineira, Brazil incorporated the HPS (Hybrid Pelletized Sinter) process to its sinter plant in Monlevade Works.
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 …
Hot pressing sintering process and sintering mechanism of …
— Abstract The W–La2O3–Y2O3–ZrO2 materials were prepared by vacuum hot pressing sintering process. The microstructure was characterized by scanning electron microscopy (SEM). The effects of sintering temperature, sintering pressure, holding time and heating rate on relative density, hardness and microstructure were studied. The …
Evaluations of hydrogen permeation on TiN-5 wt.%Ni …
— The graphene had known new materials which have a high electro-conductivity and oxidation resistance. It was a good catalyst and thus big issue material. In accordance, fabrication of TiN–graphene membrane was prepared disk type of ceramic dense membrane by hot press sintering (HPS) process.
The structure, sintering process, and chemical durability …
— Hot-press sintering (HPS) used a graphite die. The Ce 0.5 Gd 0.5 PO 4 monazite ceramics were prepared by HPS at 1150 °C for 2 h and a pressure of 30 MPa with a heating rate of 10 °C/min and a vacuum pressure less than 10 Pa. The residual carbon was removed with a muffle furnace sintering at 900 °C for 2 h.
Full article: Fundamental principles of spark plasma sintering …
— During the holding period at sintering temperature, the resistance of the system was virtually constant during all experiments. In order to realise a constant input of heat, i.e. to hold the sintering temperature, according to Joule's law the total current (I t o t a l in Figure 11) flowing through the system has to be constant, too.
The Development and Application of Spark Plasma Sintering …
— Spark plasma sintering (SPS) is a type of pulsed electric current-assisted sintering technique. This method allows for rapid consolidation of powder materials into dense bulk when simultaneously applying uniaxial pressure and pulsed electrical current in a vacuum or protective atmosphere. Many scholars and researchers have realized the …
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 ...
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 × 10 −8 …
Spark Plasma Sintering: Process Fundamentals
Spark Plasma Sintering: Process Fundamentals Pasquale Cavaliere, B. Sadeghi, and A. Shabani 1 Introduction Sintering refers to the process of firing and consolidating powders at temperatures lower than their melting point, where diffusional mass transport leads to bonding between particles and the formation of a dense body. Bulk samples could be
Utilization of low-grade iron ore through Hybrid Pelletized …
— The hybrid pelletized sinter process is an effective method to utilize low-grade iron ore fines directly as a sinter feed. The hybrid pelletized sintering (HPS) process is a non-conventional ...
Hydrogen permeation of TiN–graphene membrane by hot press sintering
— When the disk type separation membrane could fabricate to dense structured membrane by hot press sintering (HPS) process [8]. In Xiaojuan Hu's previous study, the nitrogen flux through the fresh Al 2 O 3 substrate reaches about 1300 m 3 /(m 2 h bar), whereas that through the Pd/Al 2 O 3 membrane is still as high as about 240 m 3 /(m 2 h …