Characterisation of microstructure and mechanical properties of cermets at micro- and nanoscales

Hussainova, Irina; Antonov, Maksim; Jasiuk, Iwona; Du, Xiangdong

doi:10.1504/ijmpt.2011.037206

Cited by 5 publications

(5 citation statements)

References 16 publications

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“…The cross-section of C1 (Figure 5) shows the typical microstructure generated with the HVOF process consisting of a dense Cr 3 C 2 -NiCr splat-like structure (chromium carbides distribution in the nickel-chromium (CrNi 3 ) matrix). The porosity percentage was less than 1%, as is expected for this type of coating [33,35,36]. The C2 coating (Figure 6a) has a more complex microstructure than C1.…”

Section: Coating Characterizationsupporting

confidence: 62%

“…The cross-section of C1 (Figure 5) shows the typical microstructure generated with the HVOF process consisting of a dense Cr3C2-NiCr splat-like structure (chromium carbides distribution in the nickel-chromium (CrNi3) matrix). The porosity percentage was less than 1%, as is expected for this type of coating [33,35,36]. The cross-section of C1 (Figure 5) shows the typical microstructure generated with the HVOF process consisting of a dense Cr 3 C 2 -NiCr splat-like structure (chromium carbides distribution in the nickel-chromium (CrNi 3 ) matrix).…”

Section: Coating Characterizationmentioning

confidence: 54%

“…The darker particles observed are associated with the SiC. The rest of the splat-like Cr3C2-NiCr structure and the porosity (less than 1%) are similar [33,34]. An EDS elemental mapping analysis (Figure 6b) revealed the distribution of the phases mentioned above.…”

Section: Coating Characterizationmentioning

confidence: 87%

“…CrNi 3 peaks are observed in both conditions; the coating pattern shows secondary Cr 3 C 2 peaks with less intensity, and some disappear (not detected) compared with the powder pattern. This phenomenon is due to the decarburization of Cr 3 C 2 and the Cr oxidation processes that the material experiences during the spraying process (formation of Cr 7 C 3 and Cr 2 O 3 , respectively) [31][32][33][34][35][36][37]. Due to the high content of Cr 3 C 2 -NiCr (70 wt.%) the C2 material contains, the diffraction patterns of both powders and coating (Figure 4b) are similar to those observed for the C1 material, only showing additional peaks corresponding to SiC phases and Ni 5 Y related to NiCrAlY [38].…”

Section: Coating Characterizationmentioning

confidence: 99%

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High-Temperature Erosion of SiC-NiCrAlY/Cr3C2-NiCr Coating

et al. 2023

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High-temperature erosion is a detrimental phenomenon in industries where particle flow exists, in which the search for new materials and mixes to increase the lifespan of mechanical components exposed to erosion is crucial. The present work studied the erosion resistance of two coatings at 25 °C (RT) and 900 °C in a sandblast-type rig. The coatings were fabricated with cermet-type powders: (C1) commercial Cr3C2-NiCr and (C2) commercial Cr3C2-NiCr mixed with a laboratory-conditioned powder consisting of NiCrAlY (linking matrix) and SiC (ceramic phase). Both coatings were applied on an Incoloy 330 substrate using an HVOF thermal spray process. The C2 coating was 11% harder than C1 but had a 62.2% decrement in its KIC value. The erosion test results at RT and 900 °C showed better erosion resistance on C1 than C2 at both testing temperatures and the three impact angles (30°, 60°, and 90°); this was attributed to the minor KIC induced by SiC hard particles and the bigger propagation of inter-splat and trans-splat cracks in C2. The erosion mechanisms at RT and 900 °C were similar, but at high temperature, the apparent size of plastic deformation (micro-cutting, grooves, and craters) increased due to an increase in the matrix ductility. Maximum penetration depth always occurred at a 60° impact angle.

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Section: Coating Characterizationsupporting

confidence: 62%

“…The cross-section of C1 (Figure 5) shows the typical microstructure generated with the HVOF process consisting of a dense Cr3C2-NiCr splat-like structure (chromium carbides distribution in the nickel-chromium (CrNi3) matrix). The porosity percentage was less than 1%, as is expected for this type of coating [33,35,36]. The cross-section of C1 (Figure 5) shows the typical microstructure generated with the HVOF process consisting of a dense Cr 3 C 2 -NiCr splat-like structure (chromium carbides distribution in the nickel-chromium (CrNi 3 ) matrix).…”

Section: Coating Characterizationmentioning

confidence: 54%

Section: Coating Characterizationmentioning

confidence: 87%

Section: Coating Characterizationmentioning

confidence: 99%

See 2 more Smart Citations

High-Temperature Erosion of SiC-NiCrAlY/Cr3C2-NiCr Coating

et al. 2023

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show abstract

“…This technique includes mixing, pressing and sintering of the initial powder of different materials [1]. The sintering operation is considered as one of the most important processes which influence the final density, properties and microstructure of the product [2,3]. That is why sintering technique and regimes of the sintering process should be selected carefully relatively to the materials, which will be sintered.…”

Section: Introductionmentioning

confidence: 99%