WC-toughened (Zr,W)C solid solution carbides

Kim, Jaehee; Park, Choongkwon; Ha, Daegwon; Kang, Shinhoo

doi:10.1016/j.jallcom.2015.01.315

Cited by 20 publications

(3 citation statements)

References 15 publications

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“…Ma et al reported that the addition of WC increases the density of dislocations in ZrB 2 grains, and the W segregation at the grain boundaries of ZrB 2 introduces compressive stress on grain boundaries and provides pinning effect. Kim et al revealed that the precipitation of rod‐shaped WC from super‐saturated (Zr, W)C solid solutions was shown to significantly toughen ZrC ceramics. Kim et al investigated the effects of solid‐solution interfacial conditions on the microstructural and mechanical behavior of W‐ZrC composites, demonstrating that composites of W containing 30 vol% (Zr 0.88 W 0.12 )C solid solution exhibited an excellent flexural strength of 1425 MPa at 1000°C.…”

Section: Introductionmentioning

confidence: 99%

Strong ZrC ceramics at high temperatures with the addition of W

et al. 2019

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The effect of W addition on densification, microstructure, and mechanical properties of ZrC ceramics was investigated. W reacted with carbon in ZrC to form WC, which resulted in the formation of ZrC1‐x at 1300‐1700°C, while WC was further dissolved in ZrC to form a (Zr1‐yWy)C1‐x solid solution at 1800‐2000°C. The relative density of ZrC with 5 mol% W (ZW5, 96.8%) was markedly higher than that of pure ZrC (Z0, 94.8%). ZW5 exhibited a fine homogeneous microstructure with a grain size (2.6 ± 0.5 μm) much smaller than that of Z0 (10.9 ± 3.0 μm), while excess W addition (10 mol%) in ZrC adversely affected the densification and the microstructure. The flexure strength of Z0 was 446 ± 46 MPa at room temperature, which almost linearly decreased to 281 ± 10 MPa at 1800°C in a high‐purity flowing argon atmosphere. The flexure strength of ZW5 was 512 ± 40 MPa at room temperature, and had no degradation even up to 1800°C. The fine and homogeneous microstructure of ZW5 and the removal of oxygen impurity from the grain boundaries promoted the enhancement of high‐temperature mechanical properties.

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Section: Introductionmentioning

confidence: 99%

Strong ZrC ceramics at high temperatures with the addition of W

et al. 2019

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“…Research work has also reported [24] that the solubility of W in ZrC is approximately 19.5%. Given that the solubility of Zr in WC is almost negligible [25], it can be determined that Markers 2 and 5 in Figure 5 After presetting a 0.5 mm-thick Zr702 alloy plate, to investigate the distribution of the Zr element in the laser cladding Ni60A-20wt.%WC coating and the chemistry morphology of the Zr element, EDS surface scans were performed on the central microzone of the S2 cladding coating. In Figure 6, it can be seen that the Zr elements are more uniformly distributed, showing irregular shapes such as flowers and squares.…”

Section: Composition Of the Materials Phasementioning

confidence: 99%

“…Research work has also reported [24] that the solubility of W in ZrC is approximately 19.5%. Given that the solubility of Zr in WC is almost negligible [25], it can be determined that Markers 2 and 5 in Figure 5(a1) were formed (Zr,W)C around ZrC. The fact that the Zr, W elemental maps did not completely overlap and that ZrC was detected in XRD indicated that ZrC was not completely dissolved to form (Zr,W)C. Therefore, the Zr element ended up in the form of ZrC, (Zr,W)C hard particles as the reinforcing phase of the coating.…”

Section: Composition Of the Materials Phasementioning

confidence: 99%

Effect of Energy Density on the Microstructure and Wear Resistance of Nickel-Based WC Coatings by Laser Cladding of Preset Zr702 Alloy Plates

et al. 2023

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This study aimed to evaluate the microstructure and wear resistance of laser cladding coatings with different energy densities in the case of a preset 0.5 mm thick Zr702 alloy plate to determine the specific present form of Zr elements and the optimal laser energy density. Thereby, microscopic characterization and performance tests were carried out by the microhardness tester, X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), and tribometer. The results showed that, at different energy densities, the Zr elements in the coating were mainly in the form of ZrC and (Zr,W)C, which are hard particles with high wear resistance, and diffusely distributed in the coating to have second-phase-strengthening effects. Moreover, when the energy density was 28.3 J/mm2, the coating was well fused and had the highest microhardness of 936.4 HV0.2. The wear rate of the coating was the lowest at 90.8 μm3/(m·N). The wear was characterized by hard particle spalling and abrasive wear.

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Zirconium Monocarbide

Shabalin¹

2019

Ultra-High Temperature Materials II

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WC-toughened (Zr,W)C solid solution carbides

Cited by 20 publications

References 15 publications

Strong ZrC ceramics at high temperatures with the addition of W

Strong ZrC ceramics at high temperatures with the addition of W

Effect of Energy Density on the Microstructure and Wear Resistance of Nickel-Based WC Coatings by Laser Cladding of Preset Zr702 Alloy Plates

Zirconium Monocarbide

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