Metallothermic Reduction and Direct Synthesis Techniques in Production of Chromium Disilicide

Molotovska, Liliia; Shakhnin, D. B.; Малышев, В. В.

doi:10.1007/s11106-014-9628-9

Cited by 3 publications

(2 citation statements)

References 11 publications

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“…As for other alloys, Huang et al reported magnesiothermic reduction to form hierarchical nanotubular TiN . Chromium silicide with particle sizes of 20–60 nm was synthesized by sodium reduction of silicon and a chromium–zinc melt . Sahin et al proposed production of an aluminum–titanium–boron master alloy by an aluminothermic process .…”

Section: Preparation Of Alloysmentioning

confidence: 99%

A Brief Review of Metallothermic Reduction Reactions for Materials Preparation

Xing

2018

Small Methods

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Metallothermic reduction reactions (MRRs) are displacement reactions that use reactive metals to reduce compounds so that metals, alloys, nonmetal elementary substances, and composites are produced, often in a scalable manner. In recent years, nonmetal materials, mainly silicon and carbon, particularly in their nanostructured forms obtained using an MRR with magnesium as the reductant, have started to attract much attention. However, reactions using other metals as the reductant have not been widely investigated yet. Furthermore, the reaction mechanisms and their controlling factors remain unclear, and much more effort is needed to advance this emerging field. Here, MRR preparation methods for metals, alloys, nanoporous silicon, nanoporous carbon, and composites are discussed as an introduction for new researchers in this field.

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Section: Preparation Of Alloysmentioning

confidence: 99%

A Brief Review of Metallothermic Reduction Reactions for Materials Preparation

Xing

2018

Small Methods

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“…Cr, chromium nitride and Cr x Si y phases all have high melting points and good high temperature properties242526. Therefore, their remaining after the nitridation would not have much negative effects on high temperature properties of the final product materials.…”

mentioning

confidence: 99%

Catalytic Effects of Cr on Nitridation of Silicon and Formation of One-dimensional Silicon Nitride Nanostructure

Liang

Tian

et al. 2016

Sci Rep

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The catalytic effects of chromium (Cr) on the direct nitridation of silicon (Si) and morphology of nitridation product were investigated. Cr dramatically improved the conversation of Si to silicon nitride (Si3N4). The complete conversion was achieved at 1350 °C upon addition of 1.25 wt% Cr. This temperature was much lower than that required in the case without using a catalyst. Meanwhile, Cr played an important role in the in-situ growth of one-dimensional (1-D) α-Si3N4 nanostructures. α-Si3N4 nanowires and nanobelts became the primary product phases when 5 wt% Cr was used as the catalyst. The growth processes of the 1-D α-Si3N4 nanostructures were governed by the vapor-solid mechanism. First-principle calculations suggest that electrons can be transferred from Cr atoms to N atoms, facilitating the Si nitridation.

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