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Niu, Xiaoping; Li, Lü

doi:10.1023/a:1008673004625

Cited by 30 publications

(4 citation statements)

References 15 publications

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“…This could be due to the presence of Mg2Si. Mg2Si being an intermetallic compound with high hardness, low density and a high melting temperature [35]. Hard nano-silica [36] particles distributed uniformly due to grinding and sintering led to a dispersion strengthened Mg2Si-Mg composite with the formation of intermetallic Mg2Si that has a good interface with Mg matrix.…”

Section: Mechanical Characterizationsmentioning

confidence: 99%

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Biocompatible silica-based magnesium composites

Panemangalore

Shabadi

Tingaud

et al. 2019

Journal of Alloys and Compounds

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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Section: Mechanical Characterizationsmentioning

confidence: 99%

“…The corrosion potential for Mg2Si in aluminum alloys is more positive than that of pure Mg as studied by Birbilis et.al [33]. This intermetallic Mg2Si has a high melting point and hardness [34][35][36].…”

Section: Introductionmentioning

confidence: 99%

Biocompatible silica-based magnesium composites

Panemangalore

Shabadi

Tingaud

et al. 2019

Journal of Alloys and Compounds

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“…According to this diagram, eutectic transformation proceeds at 1.48 wt% silicon, and materials from the Mg-Si system are divided into hypoeutectic, eutectic and hypereutectic. These composites can be fabricated by both powder metallurgy [22][23][24][25][26][27][28] and the casting process [6,[29][30][31][32][33][34][35][36][37][38][39][40][41][42][43]. Compared to other methods, casting is a method that can be easily adapted to the required commercial scale of production and is the most economical.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Hypo- and Hypereutectic Cast Mg/Mg2Si Composites

Braszczyńska-Malik

Malik

2020

Materials

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In this paper, the microstructure and mechanical properties of two magnesium matrix composites—a hypoeutectic with 1.9 wt% Mg2Si phase and a hypereutectic with 19 wt% Mg2Si compound—were analyzed. The investigated materials were prepared using the gravity casting method. Microstructure analyses of the fabricated composites were carried out by XRD and light microscopy. The tensile and compression strength as well as yield strength of the composites were examined in both uniaxial tensile and compression tests. The microstructure of the hypoeutectic composite was in agreement with the phase diagram and composed of primary Mg dendrites and an Mg–Mg2Si eutectic mixture. For the hypereutectic composite, besides the primary Mg2Si phase and eutectic mixture, additional magnesium dendrites surrounding the Mg2Si compound were observed due to nonequilibrium solidification conditions. The composites exhibited a rise in the examined mechanical properties with an increase in the Mg2Si weight fraction and also a higher tensile and compression strength in comparison to the pure magnesium matrix (cast in the same conditions). Additionally, analyses of fracture surfaces of the composites carried out using scanning electron microscopy (SEM + EDX) are presented.

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“…Classical Moissan’s process utilizes the high exothermic reaction of alkali metals with silicon. , The reaction mixture is heated above the melting point of alkali/alkali earth metals, but the alkali/alkali earth metal reacts also with the reactoŕs walls and gases leading to a low quality product and low yield. The starting materials are mainly pressed into pellets and then thermally treated with temperatures between 1100–1500 °C and hydraulic pressure of about 100 MPa. , A powder form of magnesium silicide can also be prepared at the laboratory scale by utilizing tantalum reactors (beakers) during the solid–solid phase reaction, whereas monocrystals are prepared by Bridgman method. , Other methods have also been employed to prepare high purity magnesium silicide, for example, mechanical alloying, spark plasma treatment, fluidized bed rector, repeated plastic working, milling in a planetary mill, ball milling, etc. Commonly used particle sizes for silicon and magnesium were in 10–300 μm range for all above-mentioned syntheses.…”

Section: Introductionmentioning

confidence: 99%

Waste Photovoltaic Panels for Ultrapure Silicon and Hydrogen through the Low-Temperature Magnesium Silicide

Dytrych

Bumba

Kaštánek

et al. 2017

Ind. Eng. Chem. Res.

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Circulation technology of waste photovoltaic panels for production of ultrapure silicon and energy in the form of hydrogen storage was designed and verified. Preparation of magnesium silicide from waste photovoltaic panel’s silicon and partially oxidized magnesium was thoroughly studied. Work was focused on process optimization, thus, three groups of reactors were tested, namely the continuously evacuated open reactor, pre-evacuated batch reactor and semiopened reactors. The influence of reaction temperature was evaluated in the range of 330–630 °C for various reaction atmospheres; argon and/or air at pressures of 5, 33, and 100 kPa; and vacuum in the range of 5–30 Pa. The effect of nitrogen and oxygen presence in the atmosphere on the resulted reaction and reaction rate was also thoroughly studied. The minimum reaction time guaranteeing the total conversion of silicon for two purities of used magnesium was also determined. The produced materials were analyzed by dispersive Raman spectroscopy, scanning electron microscopy with energy dispersive X-ray spectroscopy, and X-ray diffraction. Finally, the reactor filling, which significantly influenced the formation of magnesium silicide, was tested and established minimally at 30% of reactoŕs volume. Hydrolysis of obtained magnesium silicide by diluted acid for silicon hydrides’ (silanes) production and their subsequent thermal decomposition into the ultrapure silicon and hydrogen were successfully verified.

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Untitled

Cited by 30 publications

References 15 publications

Biocompatible silica-based magnesium composites

Biocompatible silica-based magnesium composites

Microstructure and Mechanical Properties of Hypo- and Hypereutectic Cast Mg/Mg2Si Composites

Waste Photovoltaic Panels for Ultrapure Silicon and Hydrogen through the Low-Temperature Magnesium Silicide

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