C3N4 as a precursor for the synthesis of NbC, TaC and WC nanoparticles

Li, P.G.; Lei, Ming; Sun, Zaichun; Cao, Lei; Guo, Xing Mei; Tang, W.H.

doi:10.1016/j.jallcom.2006.04.070

Cited by 32 publications

(17 citation statements)

References 21 publications

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“…Besides being refractory, other beneficial properties include thermomechanical stability, thermochemical stability, corrosion and wear resistance, good creep and fatigue resistance, unique optical and electronic properties, high emissivity at elevated temperatures, and catalytic characteristics. [1][2][3][4][5][6][7][8] These materials are of particular interest in the aerospace industry, where reentry conditions and internal rocket conditions result in harsh environments with demanding specifications. In addition to carbides, transition metal borides are also relevant materials for aerospace applications.…”

Section: Introductionmentioning

confidence: 99%

A Solvothermal Approach for the Preparation of Nanostructured Carbide and Boride Ultra‐High‐Temperature Ceramics

Kelly

Kanakala

Graeve

2010

Journal of the American Ceramic Society

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The use of a solvothermal process for the synthesis of tantalum carbide (TaC) and lanthanum hexaboride (LaB6) powders in fused‐quartz test tubes is reported in order to demonstrate the synthesis of these powders using thermal and chemical ignition techniques and to prove that the process is of a self‐propagating high‐temperature synthesis type, obviating the need for an autoclave. X‐ray powder diffraction showed phase pure powders with crystallite sizes of 25 and ∼80 nm, while dynamic light scattering showed average particle sizes of 97 and ∼130 nm, for TaC and LaB6, respectively. The data demonstrates that the powders have a very low level of agglomeration. Scanning electron microscopy shows that the TaC powders have a spherical morphology, while the LaB6 powders have a mixture of cubic and spherical morphologies.

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Section: Introductionmentioning

confidence: 99%

A Solvothermal Approach for the Preparation of Nanostructured Carbide and Boride Ultra‐High‐Temperature Ceramics

Kelly

Kanakala

Graeve

2010

Journal of the American Ceramic Society

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“…For the formation of metal carbides, further reduction process and carburization process will indeed occur. In the previous reports, g-C 3 N 4 that can decompose into some carbon nitride species was used as precursor to synthesize some nitrides and carbides [3,29]. It is thought that these carbon nitride species play crucial roles in the syntheses of metal nitrides and carbides.…”

Section: Resultsmentioning

confidence: 99%

Syntheses of metal nitrides, metal carbides and rare-earth metal dioxymonocarbodiimides from metal oxides and dicyandiamide

Lei

Zhao

Yang

et al. 2008

Journal of Alloys and Compounds

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“…Nanostructures obtained by laser ablation in toluene (Figure 1d) present large crystalline domains where a lattice distance of 0.26 nm has been measured, a distance that has been related to the spacing of (111) planes of cubic TaC [34]. The particles show a core/shell structure where the typical Onion Like Carbon (OLC) phase can be observed.…”

Section: I)mentioning

confidence: 98%

Transition Metal Carbide Core/Shell Nanoparticles by Ultra-Short Laser Ablation in Liquid

et al. 2020

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Transition metal carbide nanoparticles are a class of technological interesting materials with a wide range of applications. Among metal carbides, tantalum carbides have good compatibility with the biological environment while molybdenum carbides are used as catalyst in electrochemical reactions. Laser ablation of bulk transition metal targets in some liquids is here reported and laser ablation in organic solvents is used as simple synthetic strategy for the production of carbide nanostructures. Herein, the nanoparticles produced by ultra-short laser ablation of tantalum and molybdenum in water, acetone, ethanol and toluene have been characterized by TEM, XRD and XPS analysis. The combined effect of metal and solvent chemical and physical properties on the composition of the nanomaterials obtained has been pointed out. In particular, the different reactivity of Ta and Mo with respect to oxidizing species determines the composition of particles obtained in water, on the other hand the organic solvents decomposition allows to obtain transition metal carbide (TMC) nanoparticles. The observed carbonaceous shell formed on TMC allows to protect the particle’s carbidic core and to improve and tailor the applications of these nanomaterials.

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C3N4 as a precursor for the synthesis of NbC, TaC and WC nanoparticles

Cited by 32 publications

References 21 publications

A Solvothermal Approach for the Preparation of Nanostructured Carbide and Boride Ultra‐High‐Temperature Ceramics

A Solvothermal Approach for the Preparation of Nanostructured Carbide and Boride Ultra‐High‐Temperature Ceramics

Syntheses of metal nitrides, metal carbides and rare-earth metal dioxymonocarbodiimides from metal oxides and dicyandiamide

Transition Metal Carbide Core/Shell Nanoparticles by Ultra-Short Laser Ablation in Liquid

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