Helium and deuterium irradiation effects in W-Ta composites produced by pulse plasma compaction

Dias, M.; Catarino, N.; Nunes, Daniela; Fortunato, Elvira; Nogueira, Isabel; Rosinki, M.; Correia, J.B.; Carvalho, Patrícia Almeida; Alves, E.

doi:10.1016/j.jnucmat.2017.05.007

Cited by 15 publications

(6 citation statements)

References 44 publications

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“…They allow the sintering process to be carried out in a very short time, thus limiting the growth of the grains in the sintered material. Depending on the conditions in which the sintering process is carried out, the following methods are used: SPS (Spark Plasma Sintering) also called FAST (Field Assisted Sintering Technology), EDC (Electro Discharge Compaction) and PPC (Pulse Plasma Compaction) . This group also includes the Pulse Plasma Sintering (PPS) method developed at the Faculty of Materials Engineering of the Warsaw University of Technology .…”

Section: Introductionmentioning

confidence: 99%

“…Depending on the conditions in which the sintering process is carried out, the following methods are used: SPS (Spark Plasma Sintering) also called FAST (Field Assisted Sintering Technology), [15][16][17][18][19] EDC (Electro Discharge Compaction) 20 and PPC (Pulse Plasma Compaction). 21 This group also includes the Pulse Plasma Sintering (PPS) method developed at the Faculty of Materials Engineering of the Warsaw University of Technology. [22][23][24][25][26] This method uses periodically repeated high-current pulses produced by discharging a capacitor battery to heat the sintered powder mixture.…”

Section: Introductionmentioning

confidence: 99%

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Effect of the sintering temperature on microstructure and properties of Al₂O₃–Cu–Ni hybrid composites obtained by PPS

Zygmuntowicz

Falkowski

Wachowski

et al. 2020

Int J Applied Ceramic Tech

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In the present research, the influence of sintering temperature on the microstructure and properties of Al2O3–Cu–Ni hybrid composites prepared by the Pulse Plasma Sintering (PPS) technique were described. In this research, three temperatures have been selected: 1250°C, 1300°C, and 1350°C. SEM observations were carried out to determine the distribution of the metallic phase in the composite depending on the sintering temperature. The conducted experiments and microscopic observations enabled a better understanding of the phenomena occurring between the ceramic matrix and metallic phase in the obtained materials. The mechanical properties like a hardness and fracture toughness were measured. The technology applied allowed us to obtain ceramic‐metal composites with a homogeneous microstructure. It was found that the sintering temperature influences the selected physical and mechanical properties of the composites produced. It was found that samples produced at 1300°C are characterized by the highest relative density and the mechanical properties.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of the sintering temperature on microstructure and properties of Al₂O₃–Cu–Ni hybrid composites obtained by PPS

Zygmuntowicz

Falkowski

Wachowski

et al. 2020

Int J Applied Ceramic Tech

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“…To this end, various materials (such as W [47][48][49][50], addition of Rh in W [51], use of bcc Fe [52,53], Ta [54], W-Ta [55], Ta/Fe [56], Pd [57], nanocrystalline Cu [58], SiOC/Crystalline Fe nanocomposite [59], W-K [60], reduced activation steel [61], ferritic [62], ferritic/martensitic steels [63], Be pebbles [64][65][66][67], Be and beryllides [68], graphite, carbon fiber composite [69]) and high Z atoms (Zr, No, Mo, Hf, Ta) [70] have been tested but none proved satisfactory [71][72][73][74]. All show rapid surface degradation exhibiting surface blisters [75][76][77][78] and formation of fuzz [51,[79][80][81][82] or under dense nanostructure [40] after bubble.…”

Section: Introductionmentioning

confidence: 99%

Plasma Facing Material by Self-Interstitial Solid Solution Strengthening – Problem, Proposition, and a Solution

Rafique¹

2023

Preprint

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Bubble (point defect) – a precursor of fuzz or under dense nanostructure formation is crystal lattice defect. Suitable selection of crystal lattice which inhibit Frenkel pair generation and intrinsically promotes selfinterstitial solid solution strengthening contributes effectively towards making plasma facing material. For this, interstitial sites, their size, amount / fraction, positions, tendency of occupation and diffusion parameters (e.g. activation energies (Q), activation volumes) are determined. Fcc iron carbon alloys (austenitic stainless steels AISI / SAE 321, fcc structure, Pearson code cF4, space group Fm3̅m) are proposed as suitable candidates. Along with their room temperature fcc structure having 12 interstitial positions (4 octahedral, 6 coordination sites and 8 tetrahedral, 4 coordination sites / unit cell) to allow insertion of self (iron) atoms, they have excellent corrosion resistance, thermal conductivity, and nonmagnetic properties. After their melting, casting, and machining to required dimensions and geometry, stabilizing heat treatment is applied to precipitate all carbon as TiC and prevent formation of Cr23C6 (sensitization). This resist heat and surface degradation and yield excellent architecture which not only inhibit Frankel pair generation but will also allow bulk assimilation or surface annihilation (loop punching) of this lattice point defect. A superior thermal, fluid, and structural design augment above

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“…The current literature knowledge indicates that hybrid composites can be obtained using a variety of methods. The most popular techniques for obtaining ceramic-metal composites are as follows: slip casting [1], hot pressing [2], electro-discharge compaction (EDC) [3], field-assisted sintering technique (FAST) [4], spark plasma sintering (SPS) [5,6], and pulse plasma compaction (PPC) [7]. The Al 2 O 3 -Cu composite reveals high strength, high electric, and thermal conductivity with additional high wear resistance.…”

Section: Introductionmentioning

confidence: 99%

Thermoanalytical and dilatometric studies of the Al2O3–Cu–Mo hybrid composite

Zygmuntowicz

Piątek

Wachowski

et al. 2020

J Therm Anal Calorim

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The present research is focused on the characterization of the composites from Al 2 O 3-Cu-Mo system. The composites were prepared by slip casting method and subsequent sintering of green bodies in a reduced atmosphere. Two series of samples with different volume content of metallic powders were produced in the work: 10 vol% and 15 vol% of metal content with respect to the total solid-phase content. The sintering process of the composites was analyzed in detail. The linear shrinkage of the composites was measured. The shrinkage curves were obtained by dilatometry test in a heating mode. The composites were characterized by DTA/TG analyses and thermal conductivity. The composites were characterized by XRD, SEM, and EDX. The hardness was measured by Vickers hardness tester. Moreover, the Brazilian test was performed to determine the tensile mechanical properties of the composites. Fractography investigation was carried out as well. Dilatometric tests showed that the increase of the metallic phase volume in the ceramic matrix causes a decrease in the starting temperature of densification. Simultaneously, dilatometric experiments indicated that an increasing amount of metallic particles into the ceramic matrix increases the temperature of maximum densification and decreases the total shrinkage of the composites during sintering. The DTA/TG showed the characteristics of the dispersant decomposition to the atmosphere during thermal treatment and increase of mass connected with the oxidation of metals. Fractography results revealed good adhesion between Al 2 O 3 matrix and the metallic phase. The observation allowed to conclude that the Al 2 O 3 matrix surface is characterized by the brittle fracture mechanism.

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Helium and deuterium irradiation effects in W-Ta composites produced by pulse plasma compaction

Cited by 15 publications

References 44 publications

Effect of the sintering temperature on microstructure and properties of Al₂O₃–Cu–Ni hybrid composites obtained by PPS

Effect of the sintering temperature on microstructure and properties of Al₂O₃–Cu–Ni hybrid composites obtained by PPS

Plasma Facing Material by Self-Interstitial Solid Solution Strengthening – Problem, Proposition, and a Solution

Thermoanalytical and dilatometric studies of the Al2O3–Cu–Mo hybrid composite

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Helium and deuterium irradiation effects in W-Ta composites produced by pulse plasma compaction

Cited by 15 publications

References 44 publications

Effect of the sintering temperature on microstructure and properties of Al2O3–Cu–Ni hybrid composites obtained by PPS

Effect of the sintering temperature on microstructure and properties of Al2O3–Cu–Ni hybrid composites obtained by PPS

Plasma Facing Material by Self-Interstitial Solid Solution Strengthening – Problem, Proposition, and a Solution

Thermoanalytical and dilatometric studies of the Al2O3–Cu–Mo hybrid composite

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Product

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Effect of the sintering temperature on microstructure and properties of Al₂O₃–Cu–Ni hybrid composites obtained by PPS

Effect of the sintering temperature on microstructure and properties of Al₂O₃–Cu–Ni hybrid composites obtained by PPS