Erosion Wear Behavior of TiCN–Ni Cermets Containing Secondary Carbides (WC/NbC/TaC)

Kumar, B. Venkata Manoj; Basu, Bikramjit; Kang, Shinhoo; Ramkumar, J.

doi:10.1111/j.1551-2916.2006.01277.x

Cited by 42 publications

(13 citation statements)

References 18 publications

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“…During sintering, the added secondary carbide (NbC, WC, HfC, and TaC) formed a rim solid solution with dissolved TiCN around the undissolved TiCN core. The compositional differences between “core” and “rim” phases, using EDS analysis, have already been reported in our recent work 6 . Thus, TiCN core and (Ti, W/Nb/Ta/Hf) CN rim were bonded with metallic binders, as shown in Figs.…”

Section: Resultssupporting

confidence: 73%

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Electrochemical Behavior of TiCN–Ni‐Based Cermets

Kumar

Balasubramaniam

Basu

2006

Journal of the American Ceramic Society

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The electrochemical behavior of TiCN–20 wt% Ni cermets containing different secondary carbides (10 wt% WC, NbC, TaC, and HfC) was investigated in freely aerated 0.2 mol/L sulfuric acid. A comparison has also been made with polarization behavior of pure Ni. All the materials (except HfC‐containing cermet) exhibited active–passive polarization behavior, characterized by two passive regions. The first passive region, obtained on polarizing past the zero current potential, was attributed to passive film formation due to TiCN, while the second passive film is presumably due to the presence of a Ni binder phase. The passivation behavior in the case of cermets containing various secondary carbides (WC, TaC, and NbC) was similar to baseline TiCN–20Ni cermets, while poor passivation behavior was observed in the case of TiCN–20Ni–10HfC. Efforts have been made to correlate the passivation behavior with the microstructural characteristics of sintered cermets.

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Section: Resultssupporting

confidence: 73%

“…However, such studies are limited as far as the property and performance evaluation of this important class of materials are concerned. Our research group has recently investigated the erosion wear 6 and electro‐discharge machining (EDM) behavior 8 …”

Section: Introductionmentioning

confidence: 99%

Electrochemical Behavior of TiCN–Ni‐Based Cermets

Kumar

Balasubramaniam

Basu

2006

Journal of the American Ceramic Society

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“…Despite this, there are not many publications on these cermet coatings [2][3][4][5][6][7]. A much larger number of publications are devoted to bulk cermets fabricated by liquid-phase sintering at temperatures of 1300-1500°C [8][9][10][11][12][13][14][15][16][17][18][19][20][21]. In the latter publications on bulk cermets, special attention is paid to increasing their mechanical properties (transverse strength, hardness, and crack resistance) through to the formation of a strong bond between TiC and the matrix.…”

Section: Introductionmentioning

confidence: 99%

TiC–Cr3C2–WC–NiCr–Mo–C Cermet Plasma Coatings

Калита

Radyuk

Комлев

et al. 2021

Inorg. Mater. Appl. Res.

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Two bulk cermets TiC-WC-Cr 3 C 2 -(Ni80Cr20)-Mo-2.8C after liquid-phase sintering at 1400°C for 1 h were used to manufacture powders for plasma spraying of coatings. The cermets were fabricated at a limited time of mechanical alloying at the mixing stage. Plasma coatings were sprayed on a setup with a nozzle attached to a plasmatron for local protection of the sprayed particles from the air atmosphere. The WC-Cr 3 C 2 -C content in the cermets provided compensation for carbon losses at all stages of coating production and the formation of an annular zone, the volume of which determines the increase in the TiC content in the coatings by 20% and the formation of additional carbides in the matrix. The microhardness of cermet at an initial carbide content of 60% was 15.26-16.83 GPa with a load on the indenter of 200 G and 20.91-24.68 GPa with a load on the indenter of 20 G, and the difference was explained by a scale factor. The contribution of the microhardness of carbides to the microhardness of cermet with an initial carbide content of 60% was estimated according to the rule of mixtures, proceeding from their volume fraction and microhardness of cermet under a load on the indenter of 20 G. In the initial powder for spraying, this contribution is high, 33.19 GPa, close to the hardness of TiC. The contribution of microhardness of carbides in the coating is lower, 28.09 GPa.

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“…B ecause of their superior mechanical properties and chemical stability, Ti(C,N)‐based cermets are frequently used in the preparation of cutting tools in parallel with relatively modern protective coatings 1 . Continuous efforts in the evaluation of the cermets showed superior erosion resistance and active–passive polarization in the electrochemical behavior for electro‐discharging machining 2,3 . At present, Ti(C,N)‐cermet cutting tools are typically used for high‐speed milling, semi‐finishing, and finishing work for both carbon and stainless steels 4 …”

Section: Introductionmentioning

confidence: 99%

Effect of Nano‐Size Powders on the Microstructure of Ti(C,N)‐xWC‐Ni Cermets

Jung

Kang

2007

Journal of the American Ceramic Society

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Microstructural and compositional analyses of Ti(C,N)–xWC–20Ni cermets were performed to understand the dissolution behavior of nano‐size Ti(C,N) and WC, compared with an ultra‐fine and a micro‐sized system. The WC content was varied from 10 wt% to 70 wt%. The rapid dissolution and reprecipitation of nano‐Ti(C,N) powders induced the formation of a coreless microstructure. With an increase in the amount of WC, the concentration of W in the rims increased but was low compared with the ultra‐fine or micrometer system. An inversion in W concentration between the inner rim and the outer rim occurred at ∼40 wt% added WC. That is, the outer rim was richer in W than the inner rim. Powder size strongly affected the dissolution and precipitation of particles and was a major determinant of the final microstructure and compositions of the rims. Furthermore, a significant improvement in toughness in the case of simple nano systems was found, compared with that of the corresponding micrometer and ultra‐fine systems (KIC 10–12 vs. 6–10 MPa·m1/2). The coreless microstructure and the high fraction of rim phase in the nano system are responsible for this difference.

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Erosion Wear Behavior of TiCN–Ni Cermets Containing Secondary Carbides (WC/NbC/TaC)

Cited by 42 publications

References 18 publications

Electrochemical Behavior of TiCN–Ni‐Based Cermets

Electrochemical Behavior of TiCN–Ni‐Based Cermets

TiC–Cr3C2–WC–NiCr–Mo–C Cermet Plasma Coatings

Effect of Nano‐Size Powders on the Microstructure of Ti(C,N)‐xWC‐Ni Cermets

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