Microstructures and properties of ultrafine grained W–ZrC composites

Kim, Jaehee; Park, Choongkwon; Lim, Jin Ho; Kang, Shinhoo

doi:10.1016/j.jallcom.2014.10.128

Cited by 43 publications

(6 citation statements)

References 32 publications

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“…The required carbon deficiency was calculated based on the total weight of WeZrC before reduction. A similar result has been reported for We10 vol % ZrC powder mixtures [18]. The synthesized We30 vol % ZrC powder showed respective oxygen and carbon contents of 0.49 and 1.41 wt %, indicating its high quality.…”

Section: In Situ Wezrc and Wezr(cn) Powder Synthesissupporting

confidence: 88%

“…A recent in situ method [17,18] has produced carbide particles of 20e500 nm distributed uniformly in a W matrix without agglomeration or coarsening even after sintering. The method provides well-dispersed, uniform solid-solution composites, and other TiCebased cermets have been similarly synthesized by in situ solutionization via the carbothermal reduction of mixtures of highenergy-milled oxides.…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamic stability of in situ W–ZrC and W–Zr(CN) composites

Kim

Gao²,

Lim

et al. 2015

Journal of Alloys and Compounds

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Section: In Situ Wezrc and Wezr(cn) Powder Synthesissupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Thermodynamic stability of in situ W–ZrC and W–Zr(CN) composites

Kim

Gao²,

Lim

et al. 2015

Journal of Alloys and Compounds

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“…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. Zhang et al prepared ZrC/W cermets by a novel insitu reaction sintering process between ZrO 2 and WC.…”

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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“…For TiC dispersion strengthened tungsten, Japanese H Kurishita prepared W-(0~1.5) %TiC (mass fraction) material by the method of high energy ball milling, hot pressing and high temperature forging. The result shows that the grain size can be refined to 200 nm after the addition of TiC, the density reaches 99%, and the temperature and the high temperature strength are significantly improved (room temperature bending strength is 1.6~2.0GPa, Maximum bending strength reaches 2.5GPa) [9][10][11]; and shows good ability of resisting heat load and resisting neutron irradiation after the addition of TiC [12]. Shun Zhang adopted powder metallurgy method to prepare sintering W-TiC alloy under atmospheric pressure hydrogen atmosphere, studied the densification process of W-TiC alloy and analyzed its mechanical properties and microstructure.…”

Section: Doping Compound In Tungstenmentioning

confidence: 99%

Effect of Doping Elements on High Temperature Properties of Tungsten Products

Yang

Liu

2016

MSF

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The tungsten products including tungsten electrode, tungsten filament, tungsten crucible have been widely used in national production. To study their properties at high temperature can provide a basis for improving the production process and the quality of processing as well as reducing production defects, which has important significance for the optimization of the performance and life extension of tungsten products. In this paper the development of tungsten and tungsten products is briefly introduced, the effects of many kinds of doped elements and doped compounds on high temperature mechanical properties is summarized, the research status of high temperature properties of tungsten products described in detail. And the development direction and application prospects for optimizing the high temperature performance of tungsten products has been out looked,in order to provide a reference for the research on the mechanical properties under high temperature of tungsten products.

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Microstructures and properties of ultrafine grained W–ZrC composites

Cited by 43 publications

References 32 publications

Thermodynamic stability of in situ W–ZrC and W–Zr(CN) composites

Thermodynamic stability of in situ W–ZrC and W–Zr(CN) composites

Strong ZrC ceramics at high temperatures with the addition of W

Effect of Doping Elements on High Temperature Properties of Tungsten Products

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