Sintering and characterization of W–Y and W–Y2O3 materials

Veleva, Lyubomira; Oksiuta, Z.; Vogt, Ulrich; Baluc, N.

doi:10.1016/j.fusengdes.2008.12.001

Cited by 77 publications

(32 citation statements)

References 5 publications

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“…The Y component content used in this study was determined on the previous literatures [7,16], which reported that the relative density and the thermal shock resistance of the consolidated specimens could be increased with the increase of Y content. Fig.…”

Section: Methodsmentioning

confidence: 99%

Effects of ball milling parameters on microstructural evolution and mechanical properties of W-3% Y composites

Zhao

Zhou

Tan

et al. 2015

Journal of Nuclear Materials

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Section: Methodsmentioning

confidence: 99%

Effects of ball milling parameters on microstructural evolution and mechanical properties of W-3% Y composites

Zhao

Zhou

Tan

et al. 2015

Journal of Nuclear Materials

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“…The machinability and recrystallization temperature of the materials are enhanced significantly because of the addition of these oxides 15, 16 . Besides, the oxides distributed at grain boundaries, as the obstacles for grain boundaries migration, can inhibit the growth of tungsten grains during sintering 17 .…”

Section: Introductionmentioning

confidence: 99%

Microstructure Refinement in W-Y2O3 Alloy Fabricated by Wet Chemical Method with Surfactant Addition and Subsequent Spark Plasma Sintering

Dong

Liu

et al. 2017

Sci Rep

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With the aim of preparing high performance oxide-dispersion-strengthened tungsten based alloys by powder metallurgy, the W-Y2O3 composite nanopowder precursor was fabricated by an improved wet chemical method with anion surfactant sodium dodecyl sulfate (SDS) addition. It is found that the employment of SDS can dramatically decrease W grain size (about 40 nm) and improve the size uniformity. What’s more, SDS addition can also remarkably improve the uniform dispersion of Y2O3 particles during the synthesis process. For the alloy whose powder precursor was fabricated by traditional wet chemical method without SDS addition, only a few Y2O3 dispersoids with size of approximate 10–50 nm distribute unevenly within tungsten grains. Nevertheless, for the sintered alloy whose powder precursor was produced by improved wet chemical method, the Y2O3 dispersoids (about 2–10 nm in size) with near spherical shape are dispersed well within tungsten grains. Additionally, compared with the former, the alloy possesses smaller grain size (approximate 700 nm) and higher relative density (99.00%). And a Vickers microhardness value up to 600 Hv was also obtained for this alloy. Based on these results, the employment of SDS in traditional wet chemical method is a feasible way to fabricate high performance yttria-dispersion-strengthened tungsten based alloys.

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“…X-ray powder diffraction (XRD) analysis (Figure 6) showed that no major phase change occurred for both samples during the SPS process. It showed the advantage of the wet chemical process compared with milling procedures, for avoiding formation of WC impurities from the jar and the balls [18]. The same phenomenon was observed during the mechanical alloying of other materials [19].…”

Section: Resultsmentioning

confidence: 93%

Chemical Synthesis and Oxide Dispersion Properties of Strengthened Tungsten via Spark Plasma Sintering

et al. 2016

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Highly uniform oxide dispersion-strengthened materials W–1 wt % Nd2O3 and W–1 wt % CeO2 were successfully fabricated via a novel wet chemical method followed by hydrogen reduction. The powders were consolidated by spark plasma sintering at 1700 °C to suppress grain growth. The samples were characterized by performing field emission scanning electron microscopy and transmission electron microscopy analyses, Vickers microhardness measurements, thermal conductivity, and tensile testing. The oxide particles were dispersed at the tungsten grain boundaries and within the grains. The thermal conductivity of the samples at room temperature exceeded 140 W/m·K. The tensile tests indicated that W–1 wt % CeO2 exhibited a ductile–brittle transition temperature between 500 °C and 550 °C, which was a lower range than that for W–1 wt % Nd2O3. Surface topography and Vickers microhardness analyses were conducted before and after irradiations with 50 eV He ions at a fluence of 1 × 1022 m−2 for 1 h in the large-powder material irradiation experiment system. The grain boundaries of the irradiated area became more evident than that of the unirradiated area for both samples. Irradiation hardening was recognized for the W–1 wt % Nd2O3 and W–1 wt % CeO2 samples.

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Sintering and characterization of W–Y and W–Y2O3 materials

Cited by 77 publications

References 5 publications

Effects of ball milling parameters on microstructural evolution and mechanical properties of W-3% Y composites

Effects of ball milling parameters on microstructural evolution and mechanical properties of W-3% Y composites

Microstructure Refinement in W-Y2O3 Alloy Fabricated by Wet Chemical Method with Surfactant Addition and Subsequent Spark Plasma Sintering

Chemical Synthesis and Oxide Dispersion Properties of Strengthened Tungsten via Spark Plasma Sintering

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