Microstructural evolution during the sintering of a Ti(C,N)Mo2CNi alloy

Yang, Jun Kui; Lee, Hu‐Chul

doi:10.1016/0921-5093(95)10126-8

Cited by 50 publications

(16 citation statements)

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“…Energy-dispersive X-ray tion data on the dissolution of the different starting powders analysis (EDX) and electron energy-loss spectroscopy of cermet materials interrupted at different stages of the (EELS) in combination with TEM were used for quantitative sintering cycle. [3,7] It was found that some powders start to microanalysis. Scanning electron microscopy (SEM) was dissolve before a melt is formed, which indicates that parts utilized to obtain an overview of the microstructures.…”

Section: Introductionmentioning

confidence: 99%

“…During milling, the hcp cobalt powder is obviously deformed into nanocrystalline C. Inner Rim cobalt particles. The nanocrystalline phases present in the nonmolten binder of the 1350 ЊC material are CoO, Co 3 …”

Section: Introductionmentioning

confidence: 99%

“…Several authors have reported results importance of localizing carbon and nitrogen in the different concerned with microstructural evolution during sintering microstructural features implied that most of the microstrucof different cermet materials. [1][2][3][4][5][6] However, the mechanisms tural characterization was performed using transmission behind the formation of cermet microstructures during sinelectron microscopy (TEM) and energy-filtered transmission tering are not yet clear. Previous work presents X-ray diffracelectron microscopy (EFTEM).…”

Section: Introductionmentioning

confidence: 99%

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Development of cermet microstructures during sintering

Zackrisson

Andrén

Rolander

2001

Metall Mater Trans A

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Six Ti(C,N)-TiN-WC-Co cermet materials originating from the same powder mixture but sintered to different stages of the sintering cycle have been studied using scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), energy-dispersive X-ray analysis (EDX), electron energy-loss spectroscopy (EELS), and energy-filtered transmission electron microscopy (EFTEM). At 1350 ЊC, the binder phase exists both as solid and as liquid phase. The cobalt is nanocrystalline before melting, probably due to deformation during milling. A tungsten-rich inner rim starts to form and is very inhomogeneously distributed on the Ti(C,N) cores, indicating that it is difficult to nucleate the inner rim. The outer rim mainly forms at the sintering temperature and accounts for grain growth during the holding time. There are no major variations in metal content of the carbonitride phases in the materials sintered to 1350 ЊC or higher, although the N/(CϩN) atomic ratio changes somewhat. Close to the core-rim boundary of the materials sintered at 1430 ЊC, there is often an enrichment of nitrogen in the core that is believed to be the result of nitrogen diffusion from the tungsten-rich rim to the titanium-rich core during cooling.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Development of cermet microstructures during sintering

Zackrisson

Andrén

Rolander

2001

Metall Mater Trans A

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“…6, the interface between the gray hard phase and the white binder phase is indistinct and there is no obvious core-rim structure can be detected. Generally, the rim structure can be divided into two parts: the inner rim and outer rim, which are formed at different stages of sintering [13]. At the early stages of sintering before the appearance of liquid phase, counter diffusion of Mo 2 C and Ti(C,N) occurs and the inner rim is formed.…”

Section: Production and Characterization Of Composite Powdersmentioning

confidence: 99%

Preparation of Ni–Mo–C/Ti(C,N) coated powders and its influence on the microstructure and mechanical properties of Ti(C,N)-based cermets

Zhou

Luo

et al. 2015

Ceramics International

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“…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. The addition of some elements or compounds, such as Mo, Mo 2 C or WC [3][4][5][6], as well as Cr [3,7] have been reported to improve the sintering performance of cermets. The addition of those alloying elements to the Fe matrix also increases hardness and hardenability, as well as the volume fraction of carbides formed during sintering that increase the total amount of the ceramic phase.…”

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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Microstructural evolution during the sintering of a Ti(C,N)Mo2CNi alloy

Cited by 50 publications

References 3 publications

Development of cermet microstructures during sintering

Development of cermet microstructures during sintering

Preparation of Ni–Mo–C/Ti(C,N) coated powders and its influence on the microstructure and mechanical properties of Ti(C,N)-based cermets

High temperature transformations in a steel-TiCN cermet

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