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Koç, Raşit; Meng, Chang Gong; Swift, Geoffrey A.

doi:10.1023/a:1004876121000

Cited by 64 publications

(19 citation statements)

References 5 publications

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“…Titanium carbide (TiC) is suited to a number of commercial applications, such as abrasives, cutting tools, grinding wheels and coated cutting tips because it exhibits very high hardness, high melting temperature and excellent thermal and chemical stability [1,[11][12][13][14]. Recent studies have shown that high-energy milling of titanium and carbon powders may be a viable synthesis method for the production of TiC powder [1][2][3][4][5][6][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Raman spectroscopy sheds new light on TiC formation during the controlled milling of titanium and carbon

Lohse

Całka

Wexler

2007

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Raman spectroscopy sheds new light on TiC formation during the controlled milling of titanium and carbon

Lohse

Całka

Wexler

2007

Journal of Alloys and Compounds

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“…For instance, TiC is often used in abrasives, cutting tools, grinding wheels, and coated cutting tips. [1][2][3][4][5] It has been shown recently that TiC powder can be produced during the high-energy milling of titanium and carbon powders. [2][3][4][5][6][7][8][9][10][11][12] However, the process by which titanium and carbon react to form TiC during milling is not yet well understood.…”

Section: Introductionmentioning

confidence: 99%

Raman spectroscopy as a tool to study TiC formation during controlled ball milling

Lohse

Całka

Wexler

2005

Journal of Applied Physics

116

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Titanium and carbon elemental powder mixtures with compositions of Ti 100−x C x ͑x =50,40,30͒ were milled under a helium atmosphere using a magnetoball mill. For Ti 50 C 50 and Ti 60 C 40 powder mixtures, the combined results of external mill temperature monitoring and x-ray diffraction ͑XRD͒ analysis indicated that, after a specific incubation period, titanium carbide ͑TiC͒ was formed rapidly via a highly exothermic mechanically induced reaction. However, contrary to the current understanding of mechanically induced self-propagating reactions, Raman spectroscopy clearly showed the formation of nonstoichiometric TiC in Ti 50 C 50 and Ti 60 C 40 powders prior to the sudden exothermic event occurring inside the mill. This result has not been reported in previous studies that used only XRD analysis to characterize the as-milled powders. It is now thought that a significant component of the heat generated after the incubation period may be due to a combination of rapid grain growth and/or recrystallization of the preexisting TiC, rather than the direct formation of TiC. When milling Ti 70 C 30 , the reaction to form TiC proceeded gradually as milling progressed.

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“…Silica-carbon particles with carbon contents up to 5 wt.% were synthesized in a ring-shaped double diffusion hexametyl disiloxane (HMDSO)-oxygen flame at production rates up to 130 g/h by Kammler et al, 4 and recently the pilotscale production (up to 700 g/h) of silica-carbon nanostructured particles in a hydrogen-air diffusion flame was demonstrated. 5 Carbon-coated titania has been used by Koc and coworkers [6][7][8][9] as a precursor for TiC powder production. Thereby, they coated commercially available TiO 2 powders with carbon by decomposing C 3 H 6 at 300-600°C batch wise using multiple coating cycles (e.g., 18 cycles lasting 20 min each to obtain 32.6 wt.% carbon 7 ).…”

Section: Introductionmentioning

confidence: 99%

Carbon-coated titania nanostructured particles: Continuous, one-step flame-synthesis

Kammler

Pratsinis

2003

J. Mater. Res.

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Concurrent synthesis of titania-carbon nanoparticles (up to 52 wt.% in C) was studied in a diffusion flame aerosol reactor by combustion of titanium tetraisopropoxide and acetylene. These graphitically layered carbon-coated titania particles were characterized by high-resolution transmission electron microscopy (HRTEM), with elemental mapping of C and Ti, x-ray diffraction (XRD), and nitrogen adsorption [Brunauer-Emmett-Teller (BET)]. The specific surface area of the powder was controlled by the acetylene flow rate from 29 to 62 m 2 /g as the rutile content decreased from 68 to 17 wt.%. Light blue titania suboxides formed at low acetylene flow rates. The average XRD crystal size of TiO 2 decreased steadily with increasing carbon content of the composite powders, while the average BET primary particle size calculated from nitrogen adsorption decreased first and then approached a constant value. The latter is attributed to the formation of individual carbon particles next to carbon-coated titania particles as observed by HRTEM and electron spectroscopic imaging.

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Cited by 64 publications

References 5 publications

Raman spectroscopy sheds new light on TiC formation during the controlled milling of titanium and carbon

Raman spectroscopy sheds new light on TiC formation during the controlled milling of titanium and carbon

Raman spectroscopy as a tool to study TiC formation during controlled ball milling

Carbon-coated titania nanostructured particles: Continuous, one-step flame-synthesis

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