Investigation of microstructure and mechanical properties of W–Y and W–Y2O3 materials fabricated by powder metallurgy method

Veleva, Lyubomira; Schaeublin, R.; Battabyal, Manjusha; Plociski, T.; Baluc, N.

doi:10.1016/j.ijrmhm.2015.01.011

Cited by 57 publications

(12 citation statements)

References 16 publications

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“…These refined grains and nanosized particles produce high densities of GB/PB interfaces, which generate high strength and a promising radiation resistance. To improve the ductility W-Y 2 O 3 materials, different sintering and posttreatments such as spark plasma sintering (SPS) and high-temperature sintering in combination with hot rolling or hot forging deformation were used [34][35][36][37][38]. The performances of these W-Y 2 O 3 were investigated as potential plasma-facing materials with respect to microstructures, thermal physical properties, mechanical properties, and thermal shock response when exposed to electron beam bombardment.…”

Section: Oxide Dispersion-strengthened W-based Materialsmentioning

confidence: 99%

The Tungsten-Based Plasma-Facing Materials

Zhang¹,

Xie²,

Liu³

et al. 2020

Fusion Energy

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The plasma-facing materials in fusion reactors will face very extreme servicing condition such as high temperatures, high thermal loads, extreme irradiation conditions induced by high-energy neutron, and high fluences of high-flux and low-energy plasma. Tungsten is considered as the most promising material for plasma-facing components (PFCs) in the magnetic confinement fusion devices, due to its high melting temperature, high thermal conductivity, low swelling, low tritium retention, and low sputtering yield. However, some important shortcomings such as the irradiation brittleness and high ductility-brittle transition temperature of pure tungsten limit its application. Focusing on this issue, various W alloys with enhanced performance have been developed. Among them, nanoparticle dispersion strengthening such as oxide particle dispersion-strengthened (ODS-W) and carbide particle dispersion-strengthened (CDS-W) tungsten alloys and W fiber-reinforced W f /W composites are promising. This chapter mainly reviews the preparation, microstructure, properties, regulation, and service performance evaluation of ODS-W, CDS-W, and W f /W materials, as well as future possible development is proposed.

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Section: Oxide Dispersion-strengthened W-based Materialsmentioning

confidence: 99%

The Tungsten-Based Plasma-Facing Materials

Zhang¹,

Xie²,

Liu³

et al. 2020

Fusion Energy

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“…As tungsten is a refractory metal, conventionally, to achieve full densification, its sintering temperature would reach to 2000-2500 °C for a long holding time [4]. However, high temperature sintering usually leads to tungsten grains growing rapidly, which causes deteriorative properties, such as high ductile-brittle transition temperature (DBTT>400 °C), recrystallization brittleness and poor mechanical properties at high temperature [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…-(3), we can obtain the following equations(5)(6)(7)(8): the n 1 and β can be calculated from the slope of ln(σ)-ln( ) plot and σ-ln( ) plot, respectively, as shown inFig. 8.…”

mentioning

confidence: 99%

Uniform nanosized oxide particles dispersion strengthened tungsten alloy fabricated involving hydrothermal method and hot isostatic pressing

Xiao

Miao

Wei

et al. 2020

Journal of Alloys and Compounds

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“…The mechanical ball milling method [24][25][26][27] and wetchemical method [28][29][30][31] are mainly used by former researchers to prepare ultra-fine Y 2 O 3 -doped tungsten (W-Y 2 O 3 ) composite powders. The mechanical ball milling introduces many defects, such as vacancies and dislocations, as well as increasing the specific surface of powders, which is conducive to obtain high density sintered alloys [15,32,33].…”

Section: Introductionmentioning

confidence: 99%

Ultra-fine W–Y2O3 composite powders prepared by an improved chemical co-precipitation method and its interface structure after spark plasma sintering

et al. 2019

Tungsten

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Y 2 O 3-doped tungsten (W-Y 2 O 3) composite powders prepared by a traditional chemical co-precipitation method possess obvious bimodal distribution in size, which would deteriorate their sintering properties. The bimodal distribution can be effectively eliminated by an improved chemical co-precipitation method, in which the cationic surfactant cetyltrimethylammonium bromide (CTAB) was innovatively employed. The reduced powders with excellent uniformity have an average grain size of only ~ 31.5 nm. It is noteworthy that Y 2 O 3 particles would fuse and grow with the growth of W grains during subsequent spark plasma sintering (SPS) process, which was rarely reported in relevant literature before. On top of that, phase interfaces of sintered W-Y 2 O 3 alloys were systematically analyzed. Compared to the intracrystalline oxygen content, the oxygen content at W/Y 2 O 3 phase boundaries is relatively higher. It can be found that the (110) crystal planes of W form coherent, semi-coherent, and non-coherent interfaces with different crystal planes of Y 2 O 3. The weak interfacial bonding strength between W and Y 2 O 3 phases results from relatively more oxygen impurities as well as more semi-coherent/noncoherent interfaces at phase boundaries compared with the inner W grains.

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Investigation of microstructure and mechanical properties of W–Y and W–Y2O3 materials fabricated by powder metallurgy method

Cited by 57 publications

References 16 publications

The Tungsten-Based Plasma-Facing Materials

The Tungsten-Based Plasma-Facing Materials

Uniform nanosized oxide particles dispersion strengthened tungsten alloy fabricated involving hydrothermal method and hot isostatic pressing

Ultra-fine W–Y2O3 composite powders prepared by an improved chemical co-precipitation method and its interface structure after spark plasma sintering

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