Structural stability and mechanochemical activity of titanium nitride prepared by mechanical alloying

Lim, W. Y.; Hida, Moritaka; Sakakibara, Akira; Takemoto, Yoshito; Yokomizo, S.

doi:10.1007/bf01159823

Cited by 23 publications

(8 citation statements)

References 5 publications

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“…6. The same feature was observed from the 29 Si MAS NMR measurements of annealed samples. 6 shows that the ␤-Si 3 N 4 content in products has an upward tendency when the time of milling prior to the annealing treatment increases.…”

Section: B Thermal Treatment Of Milled Mixturessupporting

confidence: 83%

“…The same feature was observed from the 29 Si MAS NMR measurements of annealed samples. By contrast, ␤-Si 3 N 4 contains a single 29 Si resonance at about −48 ppm. The ␣-Si 3 N 4 contains two unequal tetrahedral Si sites, which give rise to two 29 Si resonances at approximately −46.6 ppm and −48.8 ppm.…”

Section: B Thermal Treatment Of Milled Mixturessupporting

confidence: 83%

“…29 Si spectra were acquired at a frequency of 79.49 MHz, using a /2 pulse width of 6.5 s and a delay time of 300 s for all the samples. Powdered samples were packed in 4 mm zirconia's rotors and spun at 10 KHz.…”

Section: Methodsmentioning

confidence: 99%

“…6 shows that the ␤-Si 3 N 4 content in products has an upward tendency when the time of milling prior to the annealing treatment increases. The ␣-Si 3 N 4 contains two unequal tetrahedral Si sites, which give rise to two 29 Si resonances at approximately −46.6 ppm and −48.8 ppm. Figure 7 shows the NMR spectra of two representative samples corresponding to the M1 mixture milled in He for 15 min and 4 h, respectively, and subsequently annealed.…”

Section: B Thermal Treatment Of Milled Mixturesmentioning

confidence: 99%

“…The ␣-Si 3 N 4 contains two unequal tetrahedral Si sites, which give rise to two 29 Si resonances at approximately −46.6 ppm and −48.8 ppm. 44 Deconvolution of 29 Si NMR spectra was performed by using the dmfit program. The different ␣/␤ ratio is evidenced in Fig.…”

Section: B Thermal Treatment Of Milled Mixturesmentioning

confidence: 99%

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Synthesis of TiN/Si₃N₄ composite powders by mechanically activated annealing

et al. 2005

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TiN/Si 3 N 4 composite powders were obtained by a process that combines the mechanical activation of titanium and silicon powders at room temperature through high-energy milling with an isothermal annealing in a nitrogen atmosphere to complete the synthetic reaction. Mechanical activation has allowed us to complete the synthesis at 1350°C only. The ␤-Si 3 N 4 content in the final powder tends to increase as the milling time is prolonged. The microstructure of the TiN/Si 3 N 4 composite powders has a bimodal character composed of TiN and ␤-Si 3 N 4 grains and ␣-Si 3 N 4 nanowires. Diameters of the nanowires range from 10 to 70 nm.

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Section: B Thermal Treatment Of Milled Mixturessupporting

confidence: 83%

Section: B Thermal Treatment Of Milled Mixturessupporting

confidence: 83%

Section: Methodsmentioning

confidence: 99%

Section: B Thermal Treatment Of Milled Mixturesmentioning

confidence: 99%

Section: B Thermal Treatment Of Milled Mixturesmentioning

confidence: 99%

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Synthesis of TiN/Si₃N₄ composite powders by mechanically activated annealing

et al. 2005

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The feasibility of synthesis tungsten nitride in magnesium‐tungsten oxide‐melamine ternary system via mechanochemical method

Torabi

Golabgir

Jamshidi

2018

Materialwissenschaft Werkst

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Different routes have been investigated to synthesize tungsten (W) – tungsten nitride (W2N) nanocomposite powder by mechanochemical method in magnesium–tungsten oxide–melamine ternary system. In stoichiometric mixture, reduction of tungsten oxide by magnesium took place after 30 minutes of milling in mechanically induced self‐sustaining reaction (MSR). A large amount of heat generated from magnesiothermic reaction, makes the used melamine unstable which causes the formation of undesirable tungsten carbide phase. By separating magnesiothermic reduction from nitride formation reaction, no thermal degradation of melamine occurred; however, milling alone has not brought much change in the used melamine to form tungsten nitride. Dispersion of reaction heat by adding magnesium in three‐stages (during 3 hours of milling) has been capable of preparing maximum value of tungsten nitride phase. According to scanning and transmission electron microscope images, the range of particle size was within 100 nanometer.

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