TGA-DSC-MS analysis of silicon carbide and of its carbon-silica precursor

Tishchenko, I.Yu.; Ilchenko, Oleksii; Kuzema, P. O.

doi:10.15407/hftp06.02.216

Cited by 11 publications

(15 citation statements)

References 19 publications

(20 reference statements)

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“…For SiC, the TGA curve (black) is monotonically reduced almost linearly until ∼620°C where a relatively large amount of loss weight happens, reaching ∼95% at 820°C. At the first 200°C, the reducing of mass must be because of the water evaporation [103]. The following 400°C, the mass loss could be associated with functional groups added to the SiC nanoparticle surface.…”

Section: Cnx-t-sic Cases (T=800 850 and 900°c)mentioning

confidence: 99%

Pyrrolic nitrogen-doped multiwall carbon nanotubes using ball-milled slag-SiC mixtures as a catalyst by aerosol assisted chemical vapor deposition

Vega-Díaz

González

Morelos-Gómez

et al. 2020

Mater. Res. Express

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We demonstrated that the ball-milled slag-SiC mixture is an effective catalyst to grow pyrrolic nitrogen-doped multiwall carbon nanotubes (N-MWCNTs) by aerosol assisted chemical vapor deposition (AACVD) method. N-MWCNTs synthesized at 800°C, 850°C and 900°C were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy, x-ray powder diffraction (XRD), and x-ray photoelectron spectroscopy (XPS) and thermogravimetric analysis (TGA). TEM characterizations revealed the presence of a bamboolike structure, a typical feature of nitrogen-doped carbon nanotubes. The presence of nitrogen was confirmed by the N1s XPS spectrum. Furthermore, a deconvolution of the N1s spectra revealed the presence of N-pyrrolic defects. This nitrogen functionality is investigated concerning the presence of silicon carbide material. Giant nanotubes with large diameters were obtained when SiC was added to the slag to be used as a substrate for N-MWCNTs synthesis. From Raman spectroscopy, the appearance of the D-band was observed, indicating the presence of topological defects that were also observed by TEM. XRD and TEM characterizations demonstrated the presence of Fe 3 C and α-Fe nanoparticles. The N-MWCNTs fabricated here could be used into (electro)catalytic applications or for reinforcing ceramic nanomaterial or polymers. OPEN ACCESS RECEIVED

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Section: Cnx-t-sic Cases (T=800 850 and 900°c)mentioning

confidence: 99%

Pyrrolic nitrogen-doped multiwall carbon nanotubes using ball-milled slag-SiC mixtures as a catalyst by aerosol assisted chemical vapor deposition

Vega-Díaz

González

Morelos-Gómez

et al. 2020

Mater. Res. Express

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“…Commercially available SiC NPs are usually prepared by “bottom-up” methods, such as carbothermal reduction , or plasmochemical and CVD processes. , Resultant NPs usually possess higher concentration of crystallite defects, larger particle size, and completely different initial surface termination in comparison with the “top-down” nano-SiC. For example, detailed XPS and elemental analysis studies were carried over industry-made by CVD 30–50 nm SiC nanopowders.…”

Section: Introductionmentioning

confidence: 99%

Size and Surface Chemistry Tuning of Silicon Carbide Nanoparticles

et al. 2017

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Chemical transformations on the surface of commercially available 3C-SiC nanoparticles were studied by means of FTIR, XPS, and temperature-programmed desorption mass spectrometry methods. Thermal oxidation of SiC NPs resulted in the formation of a hydroxylated SiO surface layer with CSi-H and CH groups over the SiO/SiC interface. Controllable oxidation followed by oxide dissolution in HF or KOH solution allowed the SiC NPs size tuning from 17 to 9 nm. Oxide-free SiC surfaces, terminated by hydroxyls and CSi-H groups, can be efficiently functionalized by alkenes under thermal or photochemical initiation. Treatment of SiC NPs by HF/HNO mixture produces a carbon-enriched surface layer with carboxylic acid groups susceptible to amide chemistry functionalization. The hydroxylated, carboxylated, and aminated SiC NPs form stable aqueous sols.

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“…Reinforcement of n-TiB 2 enhanced the samples' thermal stability greatly by strengthening the bond between each molecule of the material. Sathyaseelan, Baskaran et al 2013, Blokhina and Ivanov 2015, Tishchenko, Ilchenko et al 2015 as well as the base material (Al 2 O 3 /SiC) (Pathak, Bandyopadhyay et al 2001). The mass change recorded for samples S 1 , S 2 , S 3 and S 4 at 1488.8°C is 6.57%, 5.55%, 5.35%, and 4.77%, respectively.…”

Section: Thermogravimetric Analysismentioning

confidence: 96%

Thermal stability of n-TiB2 reinforced α-Al2O3/SiC based nanocomposite sintered at 1600˚C using TG/DTA under controlled Ar atmosphere

Nallusamy¹,

Vijayakumar²

2021

JER is an international, peer-reviewed journal that publishes f

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Innovation in material science progresses the usage of Al2O3/SiC based nanocomposites in gas turbine engine components, the harp-shaped structure of hypersonic rocket engine cutting tools for Ni, Al alloys, and clutch plate for two-wheelers. Thermal stability is one of the significant properties of gas turbine and rocket engine materials. Future engines may have to operate at very high temperature that may require high thermally stable material. In this research, an attempt is made to enhance the thermal stability of the Al2O3/SiC based nanocomposite by reinforcing 5-20 Vol. % nano Titanium Boride. Fabrication of α-Al2O3/SiC with 5-20 Vol. % n-TiB2 was carried out through pressureless sintering at 1600˚C followed by cold compaction. The fabrication process was carried out at a controlled Ar atmosphere. Thermal stability of the sintered samples was analyzed by NETZSCH STA 449F3 thermogravimetric analyzer with a heating rate of 10˚C/min and compared with Al2O3/SiC. The composite α-Al2O3/SiC/(5-20 Vol. %) n-TiB2 showed good thermal stability up to 1488˚C with 6% less mass change than Al2O3/SiC. The addition of n-TiB2 enhanced the collaboration between the atoms and postponed the decomposition temperature. The microstructure of the 20 vol % n-TiB2 added α-Al2O3/SiC was captured by 20 kV JSM-5600J Scanning Electron Microscopy and confirmed the presence of n-TiB2. Also, the presence of Ti, Si, Al, O, and B in the nanocomposite was confirmed by energy dispersive analysis of X-beams (EDS).

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TGA-DSC-MS analysis of silicon carbide and of its carbon-silica precursor

Cited by 11 publications

References 19 publications

Pyrrolic nitrogen-doped multiwall carbon nanotubes using ball-milled slag-SiC mixtures as a catalyst by aerosol assisted chemical vapor deposition

Pyrrolic nitrogen-doped multiwall carbon nanotubes using ball-milled slag-SiC mixtures as a catalyst by aerosol assisted chemical vapor deposition

Size and Surface Chemistry Tuning of Silicon Carbide Nanoparticles

Thermal stability of n-TiB2 reinforced α-Al2O3/SiC based nanocomposite sintered at 1600˚C using TG/DTA under controlled Ar atmosphere

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