Interactions in iron-based cermet systems

Aigner, K; Lengauer, W.; Ettmayer, Peter

doi:10.1016/s0925-8388(97)00360-5

Cited by 44 publications

(25 citation statements)

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“…TiCN based cermets are preferred over traditional WC-Co based hardmetals because of their higher thermal and chemical stability and their excellent combination of hot hardness, oxidation resistance and toughness [2,3,4]. Ni and/or Co are normally used as metallic binder in these composite materials although there is an increasing interest to substitute them by other elements, among which Fe is the most interesting candidate [5].The use of iron presents several advantages over Co or Ni, including non-toxicity, abundance of resources leading to lower cost and the ability to be hardened by heat treatment, which could lead to a high hardness with a lower quantity of ceramic phase [6]. However, Fe-based cermets present low sintering performance due to the poor wettability of the liquid phase and the risk of producing reaction products that lead to embrittlement [7].…”

Section: Introductionmentioning

confidence: 99%

Microstructural development and mechanical properties of iron based cermets processed by pressureless and spark plasma sintering

Alvaredo

Gordo

Biest

et al. 2012

Materials Science and Engineering: A

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Iron-based cermets are an interesting class of metal-ceramic composites which properties and the factors influencing then are to be explored. In this work the metal matrix contains Cr, W, Mo and V as alloying elements, and the hard phase is constituted by 50 vol % of titanium carbonitride (TiCN) particles. The work studies the influence of the C content and the processing method on the sinterability, microstructure and hardness of the developed cermet materials. For that purpose, cermet samples with different C content in the matrix (0 wt%, 0.25 wt%, 0.5 wt%, 1.0 wt%) were prepared by conventional pressureless sintering (CPS) and, in order to achieve finer microstructures and to reduce the sintering time, by Spark Plasma Sintering (SPS). The density and hardness (HV30) of the processed materials was evaluated, while their phase composition and microstructure was characterised by X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM), respectively. The equilibrium phase diagram of the composite material was calculated by ThermoCalc software in order to elucidate the influence of the carbon content on the obtained phases and developed microstructures.

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Section: Introductionmentioning

confidence: 99%

Microstructural development and mechanical properties of iron based cermets processed by pressureless and spark plasma sintering

Alvaredo

Gordo

Biest

et al. 2012

Materials Science and Engineering: A

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“…As reinforcement, the Ti(C,N) is mainly used in the manufacture of cutting tools at high temperature (3). There are numerous examples and applications of Fe alloys reinforced by the addition of TiC (4). However, it has been reported that the use of Ti (C,N) as ceramic reinforcement enables the fabrication of a material with better characteristics (5).…”

Section: Introductionmentioning

confidence: 99%

Colloidal processing of Fe-based metalceramic composites with high content of ceramic reinforcement

Escribano¹,

Ferrari²,

Alvaredo³

et al. 2013

Bol. Soc. Esp. Ceram. Vidr.

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“…Similarly, the International Agency for Research on Cancer (IARC) has listed nickel compounds within group 1 (there is sufficient evidence for carcinogenicity in humans) and Ni metallic and alloys as 2B (possibly carcinogenic to humans). In front of these metals, Fe is a nontoxic, abundant, and lower cost metal that can also be hardened by heat treatment [1] thus reducing the need for amounts of ceramic content as high as conventional cermets. There are however some disadvantages, mainly related to the processing, due to the lower wettability during liquid phase sintering between iron and TiCN particles than Ni and Co matrixes [2], and to the risk of producing reaction products that lead to embrittlement.…”

Section: Introductionmentioning

confidence: 99%

“…This effect consists in the appearance of an open circuit voltage, ΔV, when a temperature difference, ΔT, is applied along a sample. The thermoelectric power is then defined by (1) The combination of both techniques has been used before by Mari et. al, to analyze the microstructural changes in steels [15][16][17]; in particular, room temperature thermoelectric power has been previously found to vary inversely to the concentration of interstitial C in ferrite [18] and martensite [19].…”

Section: Introductionmentioning

confidence: 99%

High temperature transformations in a steel-TiCN cermet

Alvaredo

Mari

Gordo

2013

International Journal of Refractory Metals and Hard Materials

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The influence of the carbon content on the microstructure, phase transformation and hardness of an iron-based cermet is studied. The cermet is constituted by a high-alloyed steel as matrix, and TiCN particles (50 vol. %) as reinforcement. The material is produced by conventional powder metallurgy techniques, that is, uniaxial pressing and sintering, and the carbon content is varied from 0 wt % to 1 wt %. The aim of the research is the understanding of the transformations undergone by the material with increasing C amounts when temperature is increased. For this purpose, the cermet is studied by Mechanical Spectroscopy (MS) and Differential Thermal Analysis (DTA) and characterized by XRD, SEM and hardness measurements. The equilibrium phase diagram calculated by Thermocalc software contributes to explain the differences found on phase transformations with respect to the C content of the cermet . 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 High temperature transformations in a steel-TiCN cermet. AbstractThe influence of the carbon content on the microstructure, phase transformation and hardness of an iron-based cermet is studied. The cermet is constituted by a high-alloyed steel as matrix, and TiCN particles (50 vol. %) as reinforcement. The material is produced by conventional powder metallurgy techniques, that is, uniaxial pressing and sintering, and the carbon content is varied from 0 wt % to 1 wt %. The aim of the research is the understanding of the transformations undergone by the material with increasing C amounts when temperature is increased. For this purpose, the cermet is studied by Mechanical Spectroscopy (MS) and Differential Thermal Analysis (DTA) and characterized by XRD, SEM and hardness measurements. The equilibrium phase diagram calculated by Thermocalc software contributes to explain the differences found on phase transformations with respect to the C content of the cermet.

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Interactions in iron-based cermet systems

Cited by 44 publications

References 1 publication

Microstructural development and mechanical properties of iron based cermets processed by pressureless and spark plasma sintering

Microstructural development and mechanical properties of iron based cermets processed by pressureless and spark plasma sintering

Colloidal processing of Fe-based metalceramic composites with high content of ceramic reinforcement

High temperature transformations in a steel-TiCN cermet

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