ball milling spark

A commercial silicon nitride powder with oxide sintering additives was ground with high-energy ball mill to obtain nano-sized powder. Metallic aluminium powder was added as a grinding additive ...

The powders were uniformly mixed, high-energy ball milled (Table 1 for ball milling process), and then spark plasma sintered (Fig. 2 for sintering process) to obtain four groups of TZM-TiC composites with different contents. During spark plasma sintering, the vacuum level in the furnace was maintained at approximately 4.0 × 10 −3 Pa.

High-energy ball-milling being a severe plastic deformation process, the process introduces progressively higher amounts of strain leading to smaller crystallite …

The ball to metal powder ratio was kept at 6:1 and high energy ball milling was accomplished at the milling speed of 200 rpm only. One weight percent stearic acid was added to each charge as a process control agent (PCA) so as to prevent excessive sticking and agglomeration of Fe powders during high energy ball milling (HEBM).

The experimental systems were recently developed (Hf-Ta-Zr-Nb-Ti)C and (Mo–Nb–Ta–V–W)C high-entropy carbides, prepared by ball milling and a spark plasma sintering, with single-phase and ...

The W–TiC composite with low density and good mechanical properties was prepared by high-energy ball milling and spark plasma sintering. The microstructure morphology and phase composition of the W–TiC composite were investigated. The characteristics of the interface between the second phases and the matrix were …

The ball milling regimes are summarized in Table 1.To establish the optimal ball milling mode, the following parameters were controlled: milling time was gradually decreased from 240 to 20 min, processing was carried out in different media (Ar, isopropanol, ethylene glycol), media to powder weight ratio was set to either 1:1 or 2:1, …

DOI: 10.1111/jace.17524 Corpus ID: 225122000; Synthesis of YB 2 C 2 by high‐energy ball milling and reactive spark plasma sintering @article{Nguyen2020SynthesisOY, title={Synthesis of YB 2 C 2 by high‐energy ball milling and reactive spark plasma sintering}, author={Van-Quyet Nguyen and Jun‐Seop Kim …

W-Cu functionally graded composites (FGCs) up to six layers have been developed using high energy ball milling and spark plasma sintering (SPS) at a lower temperature of 900 °C. The relative density of W-Cu composites increased from 85.4% (W 80 Cu 20 layer) to 95.7% (W 20 Cu 80 layer) with increasing Cu content. All the W-Cu …

Copper matrix composites with zirconium diboride (ZrB2) were synthesised by ball milling and consolidated by Spark Plasma Sintering (SPS). Characterisations of the ball-milled composite powders were performed by scanning electron microscopy (SEM), X-ray diffraction, and measurement of the particle size distribution. The effect of the …

The elemental Cu,Cr,Fe,Ti, and Ni powders blend shows the expected strong and narrow Bragg peaks of the crystal structure of the elements. After 30 min of high energy ball milling the elemental Bragg peaks disappeared, and the signature of a bcc solid solution is seen (Fig. 1).For longer ball milling up to 150 min the peak intensity of the …

The effect of ball milling time and interstitial content on the microstructure and properties of sintered compacts was investigated and discussed. The sintered compacts consisted of equiaxed α+β matrixes with average grain sizes of 0.51–0.89 µm and 2–8% micrometer-sized α grains. When the ball milling time increased from 10 to 50 h, …

A novel route combining the reactive spark plasma sintering (R-SPS) and HfSi 2-C powders was proposed for fabricating dense and nano-structured HfC–SiC composites.Ultra-fine and homogeneously distributed HfC (310 nm) and SiC (210 nm) grains were obtained after sintering at 1750 °C, which were attributed to the molecular …

In this study, we develop a novel Ti-O alloy using ball milling (BM) and spark plasma sintering, which exhibits an excellent yield strength, 150% higher than that …

In the present study, a Mn–Cu-based damping alloy with a nominal composition of Mn–25Cu–2Al was produced by ball milling and spark plasma sintering. The phase composition, microstructure ...

We report the mechanical characterization by multiscale indentation of particle reinforced dense Ni/Al 2 O 3 metal matrix nanocomposites (MMNC) obtained by high-kinetic processing (HKP) of ball milling of the powders with a systematic variation of alumina nanoparticles fractions (from 1 to 20 vol. %) and spark plasma sintering (SPS). …

The high strength and low cost of titanium alloys have led to the development of these alloys for aerospace applications. In this study, ultra-high-strength Ti–N alloys were fabricated by ball-milling (BM) and spark plasma sintering (SPS), and the effects of the nitrogen content on the microstructure and mechanical properties of the alloys were …

Fig. 2 A shows the SEM image of the as received zircon powder, sharp edges and grain sizes between 3 or 4 μm and 0.1 μm are evidenced. Fig. 2 B and C shows the powder after 60 and 120 min of HEBM respectively. After the milling process, the particles were more rounded and no significant change in the particle size was detected. After 120 …

The Al-MMC were produced by spark plasma sintering of high-energy ball-milled Al-TiH 2 reactive composites.. Phase and structure formation mechanisms were studied by the ab initio calculations, DSC analysis and in-situ XRD.. The Al-MMC reinforced by fine (0.05–0.25 µm) Al 3 Ti precipitates.. The Al-MMC produced from Al-1.5%TiH 2 …

ingredients. Therefore, this article attempts to use ball milling and spark plasma sintering (SPS) to prepare an alloy with a nominal composition of Mn­25Cu­2Al. The effect of …

After ball milling, the composite powders were compacted into a graphite die with a diameter of 20 mm, followed by spark plasma sintering (SPS) at 1000 °C for 10 min in a vacuum SPS furnace, with the heating rate being 50 °C per min and the cooling rate being 100 °C per min. Finally the samples were furnace cooled to the room temperature.

Abstract. X-ray pure yttrium diborodicarbide (YB 2 C 2) was synthesized for the first time via modified spark plasma sintering (SPS) using Y 2 O 3, B 4 C, and carbon …

Ultra-fine grained (UFG) hexagonal-close-packed (HCP) hafnium (Hf) and Hf-5 wt%Y 2 O 3 (HYO) were prepared by a combination of high-energy ball milling and spark plasma sintering (SPS), and both possess high relative density (95–99%), high hardness, and low electrical conductivity.The HYO sample shows superior hardness of …

The purpose of ball milling in the first step was to make a proper amount of Al transform into in situ Al 2 O 3, whereas the purpose of ball milling in the second step was to evenly mix the raw powders. Three powder samples were prepared with different ball milling times in the first step and the same ball milling times in the second step.

Abstract. Al-SiC nanocomposites were prepared by high energy ball milling of mixtures of pure Al and 50-nm-diameter SiC nanoparticles, followed by spark plasma …

This has motivated growing interest in the powder processing by high-energy ball-milling (HEBM), a high impact force mechanical comminution technique [23], and in the powder densification by spark-plasma sintering (SPS), a pressure-assisted ultrafast sintering technique [24], both of which are scalable to industrial production and can be …

High-entropy alloy CoCrFeNiMn was produced after 90 min of high energy ball milling and consolidated by spark plasma sintering at 1073 K for 10 min. The as-milled alloy is composed of two fcc-phases with close lattice parameters, 0.360 nm and 0.356 nm. Both phases remain in the SPS-consolidated material, which was demonstrated via …

A novel route combining the reactive spark plasma sintering (R-SPS) and HfSi 2-C powders was proposed for fabricating dense and nano-structured HfC–SiC composites.Ultra-fine and homogeneously distributed HfC (310 nm) and SiC (210 nm) grains were obtained after sintering at 1750 °C, which were attributed to the molecular …

Nanostructured Cu 98 Cr 2 –W composite powder was synthesized by high-energy ball milling and consolidated by spark plasma sintering (SPS). For comparison, pure Cu and Cu 98 Cr 2 composite were also prepared under similar condition. Phase and microstructural characterization was carried out by X-ray diffraction (XRD) and …

The ball milling speed was 266 rpm, the milling time was 40 h, and the ball mill atmosphere was Ar gas. Second, the powders were sintered in a SPS-825 spark plasma sintering system for 8 min at 50 MPa pressure, 1000–1250 °C temperature, and 100 °C/min heating rate.

The multi-walled carbon nanotubes (CNTs) reinforced nickel matrix nanocomposites (Ni-CNT) have been processed via ball milling followed by spark plasma sintering (SPS) process. The CNT content in ...

We investigated the effect of high-energy ball milling (HEBM) on the microstructure and mechanical properties of powders and spark plasma sintered …

These powders were alloyed via high-energy ball milling (HEBM, Pulverisette 7, Fritsch) using stainless steel balls with a ball-to-powder weight ratio (BPR) of 10:1. The milling process was performed for 12 hr at 350 rpm, involving milling for 50 min and a cooling interval of 10 min. Ethanol was added as the process control agent (PCA) during ...

Achieving this condition is only possible by employing state-of-the-art composite powder preparation and consolidation methods, such as for example ball milling and spark plasma sintering. Low- and high-energy ball milling is a rapidly developing technology that has already proved to be a viable way of producing of Mo-based alloys …