Synthesis of complex carbonitride powders TiyMT1−yCxN1−x (MT: Zr, V, Ta, Hf) via a mechanically induced self-sustaining reaction

Córdoba, J.M.; Avilés, M.A.; Sayagués, María Jesús; Alcalá, M.D.; Gotor, F.J.

doi:10.1016/j.jallcom.2009.04.012

Cited by 29 publications

(19 citation statements)

References 23 publications

(24 reference statements)

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“…The [18]. This shift provides clear evidence of the increasing Ta content in the carbonitride structure.…”

Section: Chemical Microstructural and Physical Characterizationmentioning

confidence: 82%

“…It has been shown that the mechanically induced self-sustaining reaction (MSR) provides access to complex carbonitride phases, which use more than one transition metal [18,19]. This reactive milling method exploits the highly exothermic nature of the carbonitride formation reaction, which produces complex solid solutions via the combustion process and allows good stoichiometric control.…”

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confidence: 99%

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Effect of tantalum content on the microstructure and mechanical behavior of cermets based on (TixTa1−x)(C0.5N0.5) solid solutions

et al. 2014

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Titanium-tantalum carbonitride, (Ti,Ta)(C,N), based cermets with different Ti and Ta contents were prepared using a mechanically induced self-sustaining reaction and then densified using a pressureless sintering process. Complete microstructural and mechanical characterizations were performed on the materials, which revealed that the size of the carbonitride ceramic particle was significantly reduced when the Ta content was increased. The flexural strength and fracture toughness were measured using the ball on three balls test and the indentation microfracture test, respectively. The strength profile was analyzed under the framework of Weibull theory. The change in the mechanical properties as a function of the Ta content was correlated with the normalized microstructural parameters, such as the binder mean free path. The decrease in toughness and flexural strength was attributed to the presence of intermetallic compounds in the binder phase, which was also corroborated by the nanoindentation tests.

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“…The [18]. This shift provides clear evidence of the increasing Ta content in the carbonitride structure.…”

Section: Chemical Microstructural and Physical Characterizationmentioning

confidence: 82%

mentioning

confidence: 99%

Effect of tantalum content on the microstructure and mechanical behavior of cermets based on (TixTa1−x)(C0.5N0.5) solid solutions

et al. 2014

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“…In a recent study [21], CSCs based on (Ti,Ta)(C,N) single phase were developed by exploiting the ability of the mechanochemical process referred to as mechanically induced self-sustaining reaction (MSR) [22] to yield homogeneous carbonitride solid solution powders [23][24][25]. This method uses the strong exothermic character of carbonitride formation from the starting materials to promote self-propagating reactions by the mechanical energy supplied by high-energy ball mills.…”

Section: Introductionmentioning

confidence: 99%

“…Planetary mills are the typical devices used at laboratory scale to carry out these combustion reactions [23,26]. However, there are now some industrial planetary mills [27,28], with a really high capacity, where it would be possible to implement those reactions by a simply and efficiently way at industrial scale.…”

Section: Introductionmentioning

confidence: 99%

Toughening of complete solid solution cermets by graphite addition

Chicardi

Torres

Sayagués

et al. 2015

Chemical Engineering Journal

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Abstract(Ti 0.95 Ta 0.05 )(C 0.5 N 0.5 )-Co complete solid solution cermets (CSCs) were developed by a mechanochemical synthesis process and a pressureless sintering method. The effect of different percentages of graphite used as a sintering additive on the nature of the binder phase and the mechanical properties of the cermets was investigated. Microstructural and mechanical characterisations were carried out by X-ray diffraction, optical microscopy, scanning electron microscopy, transmission electron microscopy, energydispersive X-ray spectroscopy, Vickers hardness, indentation fracture toughness and nanoindentation. The addition of graphite modified the carbon activity during sintering, reducing the dissolution of carbonitride ceramic particles into the molten binder. The amount of Ti and Ta remaining in the binder after sintering gradually decreased as the amount of graphite added increased, which induced a change in the nature of the binder phase. When no graphite was added, the binder consisted of the brittle Ti x Ta 1-x Co 2 intermetallic phase. With the increase in the amount of graphite added, the formation of more ductile phases, such as Ti x Ta 1-x Co 3 and -Co, was observed, causing a significant improvement in the toughness of the cermets.

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“…With MSR, complex solid solutions can be obtained in a consistent and easy manner, and the chemical composition and microstructure of the materials can be controlled [25,26]. In a recent study [27], we demonstrated that ZrB 2 -HfB 2 solid solutions could be synthesised by milling powder blends of hafnium, zirconium, and boron under an inert atmosphere.…”

Section: Introductionmentioning

confidence: 99%