Influence of carbon content on the sinterability of an FeCr matrix cermet reinforced with TiCN

Alvaredo, P.; Tsipas, S.A.; Gordo, E.

doi:10.1016/j.ijrmhm.2012.10.007

Cited by 29 publications

(24 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The relative increment in hardness for the samples obtained through slurries with 50 vol.% solid content compared to 45 vol.% is about 20%, 25% and 3%, for the 50TiCN, 60TiCN and 70TiCN compositions, respectively. Comparing with data collected in the literature, recently P. Alvaredo et al [18], reported the value of density and hardness for a 430L/Ti(C,N) cermet with 50/50 v/v composition processed by powder metallurgic techniques. In this work, composites have 99% of relative density and 535HV30.…”

Section: Processing Of Composites With Different 430l/ti(cn) Ratementioning

confidence: 79%

See 1 more Smart Citation

FGM stainless steel-Ti(C,N) cermets through colloidal processing

Escribano

García

Alvaredo

et al. 2015

International Journal of Refractory Metals and Hard Materials

Self Cite

View full text Add to dashboard Cite

Ti(C,N), Cermets, Colloidal processing, Functionally gradient material, SteelIn this work, the colloidal approach was used to promote a gradation in the composition of a cermet, based on the mixture of stainless steel and Ti(C,N) during powder consolidation into a bulk part. The colloidal processing of non-oxides in aqueous media requires an elevated control over the evolution of the surface chemistry of the powders, in order to obtain stable and high concentrated slurries of the mixture of metal/non-oxide ceramic. The advantage of those methods lies on the fabrication of complex microarchitectures where the second phases are intimately and homogeneously dispersed in the microstructure of the composite. Moreover, those techniques allow the processing of fine particles with low compressibility and flowability which difficult conventional powder metallurgical processing. The results shown in this work evidence the feasibility of obtaining continuous functionally graded materials (FGM) through slip casting in porous molds, as well as the relevance of the rheological properties of the composite slurries on the final characteristics of the material.

show abstract

Section: Processing Of Composites With Different 430l/ti(cn) Ratementioning

confidence: 79%

“…Casted samples were sintered at 1450°C for 60 min in vacuum (10 − 5 atm) [18]. The micrographs of the green pieces were recorder using a T-100 scanning electron microscopy (Hitachi, Japan).…”

Section: Characterization Of the Cermetsmentioning

confidence: 99%

FGM stainless steel-Ti(C,N) cermets through colloidal processing

Escribano

García

Alvaredo

et al. 2015

International Journal of Refractory Metals and Hard Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…The use of iron as metallic phase 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 [5]. However, Fe-based cermets present low sintering performance due to the poor wettability of the liquid phase and the risk of reaction with the ceramic phase that can lead to embrittlement [6].…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

Cermets based on FeAl–NbC from composite powders: Design of composition and processing

Franco

Costa

Tsipas

et al. 2015

International Journal of Refractory Metals and Hard Materials

View full text Add to dashboard Cite

The aim of this work is the design, processing and characterization of a metal-ceramic composite (cermet) with an iron -aluminum alloy as metallic matrix and NbC as ceramic phase. The cermet is obtained from a composite powder containing in situ formed NbCrich precipitates on an iron rich metal matrix. The starting powder was supplied by CBMM (Brazil), and it was produced by a synthesis process under development which introduces other metals such as Al, Si and Ti to the composition. Due to the in situ process, good bonding is expected between the carbide and the matrix. However it is necessary to study the processability of those complex particles and the transformations occurring during sintering to get the final microstructure. Thermodynamic studies by means of ThermoCalc ® software were performed to predict the phases stable with the starting composition and also the influence of Fe and C additions. Samples were produced by uniaxial pressing and vacuum sintering (PS), and also by Field Assisted Hot Pressing (FAHP). The processing parameters for PS processing, that is, sintering temperature and time were based on themodynamic simulations by ThermoCalc ® software together with thermal analysis. The powders were characterized by measuring density, particle size, carbon content and chemical composition; and consolidated samples by density and Vickers hardness. The microstructure and morphology of the powder and consolidated samples was analyzed by SEM. The addition of Fe and both C and Fe to the starting cermet composition provided good results as the final microstructure consisted essentially of NbC and Fe matrix. Abbreviations PS -Pressing and Sintering FAHP -Field Assisted Hot Pressing

show abstract

“…The main conclusions that can be drawn from them are: 1) C favors the dissolution of heavy metals in the metallic matrix [10], and 2) C promotes the dissolution-precipitation mechanism of the TiCN particles during the sintering, namely, the formation of the solid solution (Ti, M)(C,N) [11,12]. However these studies are focused in Co/Ni matrix cermets and few studies have been found in steel matrix cermets [13,14]. These studies agree on the great influence of carbon content in the microstructure of the cermet, and hence the final properties.…”

Section: Introductionmentioning

confidence: 99%

Influence of carbon content on microstructure and properties of a steel matrix cermet

Alvaredo¹,

Bruna²,

Crespo³

et al. 2018

International Journal of Refractory Metals and Hard Materials

Self Cite

View full text Add to dashboard Cite

There is a marked correlation between the composition, microstructure and properties in TiCNbased cermets. In the case of using iron alloys as metallic matrix the carbon content is of particular significance, as not only influences the stoichiometry of ceramic phase but also induces phase transformations in the steel matrix. However, such influence has been less studied in steel matrix cermets than in conventional Ni or Co ones, so the aim of this work is to contribute to the study of the influence of carbon content on the microstructure and properties of a steel matrix cermet containing fixed quantities of alloying elements. Samples were prepared by powder metallurgy and characterized combining different techniques as Transmission Mössbauer spectroscopy (TMS), X Ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM), to explain differences found in hardness and toughness.

show abstract

Influence of carbon content on the sinterability of an FeCr matrix cermet reinforced with TiCN

Cited by 29 publications

References 13 publications

FGM stainless steel-Ti(C,N) cermets through colloidal processing

FGM stainless steel-Ti(C,N) cermets through colloidal processing

Cermets based on FeAl–NbC from composite powders: Design of composition and processing

Influence of carbon content on microstructure and properties of a steel matrix cermet

Contact Info

Product

Resources

About