The influence of high energy milling and sintering parameters on reactive sintered (Ti, Mo)C–Ni cermets

Jõeleht, Marek; Pirso, Jüri; Juhani, Kristjan; Viljus, Mart; Traksmaa, Rainer

doi:10.1016/j.jallcom.2015.02.071

Cited by 23 publications

(4 citation statements)

References 25 publications

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“…SHS of cemented titanium carbide with Ni(Mo) binder has been studied for about 30 years [5,7,135,137], but the issues related to the mechanisms of reaction, as well as phase and structure formation still attract the attention of scientists [138][139][140]. However, most of these results just confirm known features and mechanisms (such as dissolution-precipitation or reaction diffusion, effective activation energy, sequence of phase formation, etc.…”

Section: Metal-ceramic Materialsmentioning

confidence: 99%

Self-propagating high-temperature synthesis of advanced materials and coatings

Левашов

Mukas'yan

Rogachev

et al. 2016

International Materials Reviews

300

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Self-propagating high-temperature synthesis (SHS) or combustion synthesis (CS) is a rapidly developing research area. SHS materials are being used in various fields, including mechanical and chemical engineering, medical and bioscience, aerospace and nuclear industries. The goal of the present paper is to provide a comprehensive state-of-the-art review and to analyse a critical mass of knowledge in the field of SHS materials and coatings. We also briefly discuss the history and scientific foundations of SHS along with an overview of the technological aspects for synthesis of different materials, including powders, ceramics, metal-ceramics, intermetallides, and composite materials. Application of CS in the field of surface engineering is also discussed focusing on two main routes for applying SHS to coating deposition: (i) single-step formation of the desired coatings and (ii) use of SHSderived powders, targets or electrodes in the coating deposition processes.

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Section: Metal-ceramic Materialsmentioning

confidence: 99%

Self-propagating high-temperature synthesis of advanced materials and coatings

Левашов

Mukas'yan

Rogachev

et al. 2016

International Materials Reviews

300

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“…In this respect, cermets with modified core‐rim structures have attracted much attention. Since Kang prepared complete solid‐solution cermets (CSCs) in 2005, many studies on CSCs have been reported by Córdoba, Kwon, Xiong, Liu, Jõeleht, and Chicardi . Compared with conventional cermets, CSCs exhibit a higher strength and toughness by replacing the core‐rim phases with single homogeneous solid‐solution grains.…”

Section: Introductionmentioning

confidence: 99%

“…Mechanically induced self‐sustaining reaction (MSR) is a promising method for preparing (Ti, M)C/(Ti, M)(C, N) powders and CSCs . Typically, a mixture of Ti, W, Mo, and C is crushed by high‐energy ball milling; then, nanosized (Ti, M)(C, N) or composite powders are formed by the self‐propagation reaction of Ti and C. Products with homogeneous and controlled chemical composition can be achieved by simply adjusting the milling parameters and the starting composition of mixture .…”

Section: Introductionmentioning

confidence: 99%

Dual‐grained (Ti, W)C–Ni cermets by two‐step carbonization: Hot isotropic press sintering of NiTiW alloys and colloidal graphite

Xiong

Yue

et al. 2018

J Am Ceram Soc

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Reactive sintering of crushed metals and carbon is advantageous for preparing toughened complete solid-solution cermets (CSCs). Here, dual-grained (Ti 0.6 , W 0.4 )C-18Ni cermets were prepared using a two-step carbonization method. High-energy milling of Ni-Ti-W-C (Ni(Ti 0.6 , W 0.4 ) 4 C) mixture afforded NiTiW solid solution, which was then transformed into Ni 6 W 6 C by heating at 1250°C.Twinned (Ti, W)C platelets were formed by the carbonization of Ni 2 W 4 C during liquid sintering. W atoms that accumulated in the (111) planes of TiC promoted the {111} twin formation, leading to sandwich-type (Ti, W)C platelets. Dense (Ti 0.6 , W 0.4 )C-18Ni cermets were obtained by hot isostatic press sintering in Ar with satisfactory Hv of 12.8 ± 0.2 GPa, high strength of 1960 ± 84 MPa and toughness of 15.80 ± 0.6 MPa·m 1/2 . A higher sintering temperature or graphite content accelerated the carbonization, resulting in coarser platelets with decreased aspect ratio. This study provides a new approach to modify the microstructure of CSCs and a method for preparing dual-grained cermets.

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“…Recently, the mechanically induced self-sustaining reaction process (MSR) has been employed to obtain a wide range of complex carbonitrides that contain two different transition metals in an affordable and simple fashion [37][38][39], and different CSCs have been developed using this methodology [8,[40][41][42][43]. MSR processes [44] are comparable to SHS and may occur during milling extremely exothermic powder mixtures.…”

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confidence: 99%

Effect of the impact energy on the chemical homogeneity of a (Ti,Ta,Nb)(C,N) solid solution obtained via a mechanically induced self-sustaining reaction

Obra

Gotor

Chicardi

2017

Journal of Alloys and Compounds

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A titanium-tantalum-niobium carbonitride solid solution, (Ti,Ta,Nb)(C,N), was synthesised in a planetary mill via a mechanochemical process that involves a mechanically induced self-sustaining reaction (MSR) from stoichiometric Ti/Ta/Nb/C mixtures that are milled under a nitrogen atmosphere. The influence of the spinning rate of the planetary mill, which determines the impact energy of the milling process, on the ignition time (t ig) of the MSR process as well as the chemical homogeneity of the final product was analysed. The results indicated that the dependence of t ig on the spinning rate followed a potential function with a potential factor of 4.85, implying a remarkable reduction in the milling time required to induce the self-sustaining reaction at increasing spinning rates (i.e., from 4200 min at 200 rpm to 15 min at 800 rpm). However, the chemical and structural characterisation of the obtained products at ignition without any extra milling treatment indicated that a single solid solution phase was only obtained at the lowest spinning rates (i.e., less than 300 rpm). At increasing rates, the relative amount of the intended solid solution phase continuously decreased, and new undesirable secondary phases were formed. Despite the long milling times required for the milling experiments that were performed at the slowest spinning rates, iron contamination from the milling media was negligible due to the low intensity milling regime.

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The influence of high energy milling and sintering parameters on reactive sintered (Ti, Mo)C–Ni cermets

Cited by 23 publications

References 25 publications

Self-propagating high-temperature synthesis of advanced materials and coatings

Self-propagating high-temperature synthesis of advanced materials and coatings

Dual‐grained (Ti, W)C–Ni cermets by two‐step carbonization: Hot isotropic press sintering of NiTiW alloys and colloidal graphite

Effect of the impact energy on the chemical homogeneity of a (Ti,Ta,Nb)(C,N) solid solution obtained via a mechanically induced self-sustaining reaction

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