Synthesis of MoSi2-TiSi2 pseudobinary alloys by reactive sintering

Matsuura, Kiyotaka; Ohmi, Tatsuya; Kudoh, Masayuki; Hasegawa, Tohru

doi:10.1007/s11661-000-0016-3

Cited by 14 publications

(2 citation statements)

References 24 publications

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“…62) In particular, nanoparticles of binary alloys are anticipated as potentially useful materials. For instance, nanoparticles of molybdenum-disilicide MoSi 2 and titanium-disilicide TiSi 2 have been synthesized 63) for extremely small electronic and mechanical applications such as solar-control windows, electromagnetic shielding, and contact materials in microelectronics. Titanium-diboride TiB 2 displays high strength, durability, mp, hardness, and wear resistance.…”

Section: Binary Alloy Nanoparticlesmentioning

confidence: 99%

Progress of computational plasma fluid mechanics

Shigeta

2023

Jpn. J. Appl. Phys.

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This article reviews and discusses the recent progresses of studies with the concept of “Computational plasma fluid mechanics”. Computational demonstrations show that the inhouse simulation codes such as PLASTIPC (PLasma All-Speed Turbulence with Implicit Pressure Code) have captured hydrodynamic instabilities and reproduced flow dynamics in thermal plasma – nonionized gas coexisting systems. A unique method has made it feasible to study collective growth of binary alloy nanoparticles by numerical analysis. SPH (Smoothed Particle Hydrodynamics) method with incompressibility modification has achieved complex behaviors of molten metal involving phase change, flow, heat transport, material mixing, and large deformation during arc welding. It is essential to study thermal plasma processes as comprehensive fluid systems in which hot plasma, cold nonionized gas, and materials coexist. The viewpoint and approaches of fluid mechanics as well as plasma physics are indispensable. Computational study will play a more important role in giving us new and deeper insights.

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Section: Binary Alloy Nanoparticlesmentioning

confidence: 99%

Progress of computational plasma fluid mechanics

Shigeta

2023

Jpn. J. Appl. Phys.

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“…Fabrication of functional nanoparticles with high purity is strongly required for enormous industrial applications. In particular, nanoparticles of silicides, silicon-based intermetallic compounds, provide unique characteristics such as high electrical conductivity and high heat/oxidation resistance [1].…”

Section: Introductionmentioning

confidence: 99%

Growth mechanism of silicon-based functional nanoparticles fabricated by inductively coupled thermal plasmas

Shigeta¹,

Watanabe²

2007

J. Phys. D: Appl. Phys.

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An experimental and computational study is conducted for the Si-based functional nanoparticle fabrication in an inductively coupled thermal plasma reactor. In the computational study, the improved multi-component co-condensation model with nodal discretization is proposed to clarify the nanoparticle growth mechanism in the consideration of coagulation and thermophoresis as well as simultaneous co-condensation. The nanoparticle growth by nucleation and co-condensation completes approximately in 12.6 ms for the Mo–Si system and in 5.0 ms for the Ti–Si system. Mo nanoparticles grow in advance, and then Si vapour condenses on the Mo nanoparticles in the Mo–Si system, while vapours of Si and Ti simultaneously co-condense following Si nucleation in the Ti–Si system. A smaller number of larger nanoparticles are created with an increase in the powder feed rate. When the silicon content in the feed powders is 66.7%, nanoparticles of MSi2 (M = Mo, Ti) are fabricated as the main product. Nanoparticles of Ti5Si3 are mainly synthesized in the case of the silicon content 33.0%. In the experiment, the nanoparticles are successfully fabricated and examined by x-ray diffractometry and transmission electron microscopy. The experimental and computational results show good agreement in the size distribution and the composition.

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Two-Directional Nodal Model for Co-Condensation Growth of Multicomponent Nanoparticles in Thermal Plasma Processing

Shigeta

Watanabe

2009

J Therm Spray Tech

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A more precise but easy-to-use model is developed and proposed to clarify nanoparticle growth with twocomponent co-condensation in thermal plasma processing. Computations performed for the molybdenumsilicon and titanium-silicon systems demonstrate that the model quantitatively estimates both the particle size distribution and the composition distribution of the silicide nanoparticles produced through co-condensation as well as nucleation and coagulation. The model also successfully obtains information that cannot be acquired by any other models. As a consequence, the detailed growth mechanisms of the silicide nanoparticles are eventually revealed. The present model is thus an ''adaptable'' and useful tool for analyzing nanoparticle growth processes, including co-condensation, with sufficient accuracy.

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Synthesis of MoSi2-TiSi2 pseudobinary alloys by reactive sintering

Cited by 14 publications

References 24 publications

Progress of computational plasma fluid mechanics

Progress of computational plasma fluid mechanics

Growth mechanism of silicon-based functional nanoparticles fabricated by inductively coupled thermal plasmas

Two-Directional Nodal Model for Co-Condensation Growth of Multicomponent Nanoparticles in Thermal Plasma Processing

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