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

Калита, В. И.; Radyuk, A. A.; Комлев, Д. И.; Ivannikov, A. Yu.; Михайлова, А. Б.; Алпатов, А. В.

doi:10.1134/s2075113319020205

Cited by 4 publications

(4 citation statements)

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“…Previously published data of other authors on the positive effect of WC, Cr 3 C 2 , and Mo 2 C on the mechanical properties of bulk cermets [19] are confirmed in this study for plasma coatings as well. Using liquid-phase sintering at 1400°C for 1 h during the manufacture of the powder was positive, the annular zone was formed, and its volume increased the TiC content, which we did not observe earlier in the manufacture of the powder using solidphase sintering at 1100°C [1].…”

Section: Discussioncontrasting

confidence: 74%

“…In this study, we used WC and Cr 3 C 2 carbides to form an annular zone, which together with Mo provide a strong bond between TiC and the matrix phase [11,12,16,18]. A part of WC, Cr 3 C 2 , and Mo become components of the matrix, and during its solidification, they can form nanosized carbides and supersaturated solid solutions, strengthening the matrix phase during plasma spraying [1]. Works on elemental analysis of annular zones and matrix phase of TiC-based cermets are known [11,12,16,18].…”

Section: Discussionmentioning

confidence: 99%

“…Gas-thermal TiC-based cermet coatings are promising and can compete with WC-Co, since they operate at higher temperatures, have a higher hardness, and dissolve less in the matrix phase during plasma spraying [1][2][3][4][5][6][7]. Despite this, there are not many publications on these cermet coatings [2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…The introduction of additional carbon is used to counteract oxygen, the content of which reaches 4 wt % after mechanical alloying (MA) [21]. A supplementary addition of carbon up to 3 wt % to compensate for its losses at the MA and plasma spraying stage was used in recent studies on plasma TiCbased cermet coatings [1,22].…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Discussioncontrasting

confidence: 74%