The cerium silicides, Ce5Si3, Ce3Si2, CeSi, CeSi2−y, and CeSi2−x, have been prepared from the elements by mechanochemical processing in a planetary ball …
In this study, cerium silicides were used as a surrogate material to investigate the feasibility of high-energy ball milling and Spark Plasma Sintering (SPS) for the …
Higher manganese Silicides (HMS) were found to decompose into MnSi phase in the ball milling process. Effects of the ball milling parameters on the phase decomposition and on the mean grain size of powders were studied. The decomposition was understood as a mechanochemical effect induced by the high-energy mechanical …
Ball milling is a mechanical technique that is broadly used to grind powders into fine particles [134–141]. The reactants are generally broken apart using solvent molecules in …
Małgorzata Sopicka-Lizer, in High-Energy Ball Milling, 2010. 8.2.3 Silicides. Silicides of molybdenum and tungsten are an important group of attractive intermetallic systems for high-temperature applications because of their excellent oxidation resistance and outstanding thermal shock resistance. Preparation of these compounds in the form of ...
Most metal carbides or slicides may be synthesized at room temperature, by ball milling mixtures of elemental powders for some tens of hours with a vibratory …
This paper describes a simple and effective mechanochemical method based on solid-state reactions during ball milling for synthesis of nanoscaled ceria (CeO2) …
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Effect of Synthesis Routes on Microstructure of . the nanocrystalline cerium oxide powder (a) ball milled for 0 to 20 hs, the inset shows the broadening of the (111) peak with milling time, (b) change in particle size with milling time for 20 hs and (c) X-ray pattern for solution combustion synthesized ceria powder.
Inconel 718 particle surfaces were decorated with 2 vol% SiC nanowires via ball milling. • SiC decomposed into Silicon and Carbon leading to formation of (Nb,Ti)-based carbides and silicides during LPBF of Inconel 718 + SiC nw.. Inconel 718 + SiC nw composite showed a "defect-free" microstructure with a smaller average grain size, …
For example, the shear stress generated during wet soft milling of graphite produces graphene if zirconium oxide or stainless steel as milling media and using less than 300 rpm is used [16][17][18 ...
Quantitative cerium dissolution from the weathered residual rare earth ore was achieved by planetary ball milling for 720 min; cerium dissolution from the without grinding ore was 20.0%. Comparison of cerium dissolution and specific surface area strongly suggested that the enhancement of cerium dissolution was not simply due to …
The cerium silicides, Ce 5Si 3,Ce 3Si 2, CeSi, CeSi 2 y, and CeSi 2 x, have been prepared from the elements by mechanochemical processing in a planetary ball mill. Preparation of the cerium silicide Ce 5Si 4 was unsuc-cessfully attempted and potential reasons for this are discussed. Temperature and pressure of the milling
To avoid mechanochemical decomposition of HMS and minimize the formation of MnSi during ball milling, [135] Zamanipour et al. [117] studied the influence of the milling time and rotation speed ...
The temperature dependence of Hall carrier density (p H) and mobility (μ H) for the HMS samples are plotted in Fig. 4.For the three samples ball-milled for 2 h, 6 h, and 18 h, the room-temperature p H is similar and close to 1.3 × 10 21 cm −3.Furthermore, the p H values are almost constant with temperature, which is typical for degenerate …
For longer milling durations, E. Groβ et al. [28] obtained a mean grain diameter of 5 μm after 1 h with planetary steel ball mill, and M. Saleemi et al. [27] reached the sizes of 50–500 nm after 8 h with tungsten carbide vials and balls, both milled in hexane media. The distribution curve of the wet milling sample is divided into two peaks ...
Crystals of binary manganese silicides were grown from high temperature copper, tin and lead metal fluxes by slow cooling method under an argon atmosphere. The growth conditions for obtaining single crystals of relatively large size were established. For tin and lead fluxes, the three silicides Mn 5 Si 3, MnSi, and Mn 27 Si 47 crystals were …
DOI: 10.1016/J.JALLCOM.2015.04.048 Corpus ID: 136867683; Effects of ball milling on microstructures and thermoelectric properties of higher manganese silicides @article{Chen2015EffectsOB, title={Effects of ball milling on microstructures and thermoelectric properties of higher manganese silicides}, author={Xi Chen and Li Shi …
The cerium silicides, Ce5Si3, Ce3Si2, CeSi, CeSi2−y, and CeSi2−x, have been prepared from the elements by mechanochemical processing in a planetary ball mill. Preparation of the cerium silicide Ce5Si4 was unsuccessfully attempted and potential reasons for this are discussed. Temperature and pressure of the milling vial were monitored in ...
The cerium silicides, Ce5Si3, Ce3Si2, CeSi, CeSi2−y, and CeSi2−x, have been prepared from the elements by mechanochemical processing in a planetary ball …
Mechanochemical synthesis and spark plasma sintering of the cerium silicides Gordon A. Alanko a, Brian Jaques a, Allyssa Bateman a, Darryl P. Butt a, b, ⇑ a Department of Materials Science and Engineering, College of Engineering, Boise State University, 1910 University Drive, Boise, ID 83725, United States b Center for Advanced …
High-entropy materials have since expanded to include borides 14, carbides 15, 16, 17, nitrides 18, sulfides 19 and silicides 20, 21, which have remarkable properties leading to applications in ...
A simple and effective process is used to synthesize undoped Higher Manganese Silicides (HMS), involving ball milling under soft conditions to obtain homogeneous mixtures of constituting elements, and subsequent spark plasma sintering for a direct solid state reaction. For comparison purpose, the ball milling step is carried out …
In our previous study [20], BM was carried out in SS jars at 300 rpm.The XRD patterns of the powders ball-milled for different durations are shown in Fig. 1.The as-melted HMS after short-time milling (sample A1) contained small quantities of MnSi and Si phases due to the incomplete peritectic reaction (MnSi + Si → HMS) [22] suppressed by the low …
The elemental Ce and Si powder were loaded into milling vessel with 3:2 M ratio, with milling media of 10:1 ball-to-powder ratio. The milling process was carried out at 550 rpm for 12 h, followed by 1 h milling and 5 min break. The milled powder attached to the vessel wall was collected by additional milling with acetone at 400 rpm for 30 min ...
The cerium silicides, Ce 5 Si 3, Ce 3 Si 2, CeSi, CeSi 2− y, and CeSi 2− x, have been prepared from the elements by mechanochemical processing in a planetary ball mill. …
Cerium dissolution was strongly increased by planetary ball milling of ore. •. Planetary ball milling changed rate-determining process from chemical reaction to …
A high energy ball milling process was used to produce dysprosium nitride and cerium nitride powders at room temperature. Dysprosium and cerium metal flakes were milled in a 275 kPa nitrogen atmosphere for 24 h at ambient temperatures. X-ray diffraction confirmed the formation of phase pure dysprosium nitride and cerium nitride …