Fast fabrication of W–Cu functionally graded material by high-gravity combustion synthesis and melt-infiltration

Zhao, Pei; Guo, Shiyu; Liu, G.H.; Chen, Y.X.; Li, J.T.

doi:10.1016/j.jnucmat.2013.10.032

Cited by 14 publications

(5 citation statements)

References 23 publications

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“…Functionally graded materials (FGM) are a new type of advanced materials consisting of the continuous or discontinuous gradient in their compositions or structures [1,2]. Depending on the type of materials and FGM applications, several methods are used to fabricate FGMs such as powder metallurgy, casting, freezeform extrusion, high-gravity combustion synthesis, roll bonding, remelting and sedimentation process, and centrifugal casting [3][4][5][6][7][8]. Since each method has its own advantages and disadvantages, it is hard to define the best method to produce FGMs.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and microstructural properties of titanium/hydroxyapatite functionally graded material fabricated by spark plasma sintering

2018

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In this article, different functionally graded material specimens were made from titanium powder and hydroxyapatite (HA) submicron particles. The spark plasma sintering method was applied to fabricate the specimens. Two kinds of starting powder mixture were used: mixed powder and ball-milled powder. Percentage of HA was changed from 0 vol.-% to 40 vol.-% in the different number of layers (2, 3 and 5-layer). The effects of the number of the layers and ball-mill process were investigated on microstructure, microhardness, compressive strength and fracture surface. The results show that the grain size has been enhanced by increasing the amount of HA in the layers. In addition, the Vickers microhardness has been first increased by enhancing the percentage of HA, while it has been decreased in the layers with a higher amount of it. Furthermore, the highest compressive strength could be achieved in the five-layer samples. Moreover, specimens with ball-milled powder have higher microhardness and less compressive strength.

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Section: Introductionmentioning

confidence: 99%

Mechanical and microstructural properties of titanium/hydroxyapatite functionally graded material fabricated by spark plasma sintering

2018

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“…Combustion heating with the use of thermite reaction [29][30][31] can reach temperatures estimated in the 1800 -2500 °C range.…”

Section: Infiltration Temperaturementioning

confidence: 99%

“…With the use of rapid heating techniques, the processing times can be significantly reducede.g. for the combustion heating, times about 5 min were reported [29], for current-assisted melt infiltration (CAMI) even about 5 s [28]. The latter case resulted in ultra-fast processing, however, the produced composites were inhomogeneous and porous.…”

Section: Infiltration Timementioning

confidence: 99%

“…In the more advanced configurations, such as combustion heating + centrifugal infiltration, the tungsten preform is placed at the extremity, in the direction of the centrifugal force, this is followed by the copper and termite (or their mixture) towards the center [29][30][31]. In [3,33] the centrifugal infiltration concept was used in a cylindrical geometry, when a tungsten preform consisting of braided fibers was placed in a rotating tube, with the copper infiltrating it from the center.…”

Section: Geometric Configuration Of the Infiltration Setupmentioning

confidence: 99%

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Preparation of W-Cu composites by infiltration of W skeletons – review

Matějíček

2021

METAL 2021 Conference Proeedings

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“…W-Cu and W-Cu alloys are used in a wide area of applications, such as plasma facing components (PFCs) for the divertors in fusion reactors [6], fabrication of W-Cu functionally graded materials (FGM) between W and Cu to reduce interfacial thermal stresses [7] in electrical contacts, heat sinks, electroerosion segments [6] [8]; and in military applications such as kinetic energy projectiles, ammunition, in radiation shielding, etc. [1] [9]- [12].…”

Section: Introductionmentioning

confidence: 99%

The Effects of Sintering Temperature on the Densification of Mechanically Alloyed W-Brass Composites

Gowon¹,

Mohammed²,

Jamaluddin³

et al. 2015

OJMetal

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Prealloyed (PA) and premixed (PM) W-brass with the composition of 60 wt% W, 1 wt% Ni and 39 wt% brass was sintered at the temperature of 800˚C, 920˚C and 1000˚C each. As a result of difficulties in the densification of W-Cu and W-Cu alloys, mechanical alloying (MA) and activated sintering were combined. The powders were mechanically alloyed for 13 hours to produce nanosized W grains embedded in brass. The microstructure and properties of these composites with increase in sintering temperature has been studied. Both prealloyed and premixed composites sintered at 800˚C (solid state sintering) and 920˚C (sub-solidus state sintering) have lower sintered densities and hardness. The densification rate in the premixed composites was observed to be higher than that of the prealloyed composites. Their densification and properties increased with the increase in the sintering temperature. Premixed composite sintered at 1000˚C had 91.0% sintered density, 180 Hv microhardness against 76.0% and 133 Hv respectively for prealloyed composite at the same temperature. The values of electrical conductivity in both prealloyed and premixed composites increased with increase in temperature.

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Fast fabrication of W–Cu functionally graded material by high-gravity combustion synthesis and melt-infiltration

Cited by 14 publications

References 23 publications

Mechanical and microstructural properties of titanium/hydroxyapatite functionally graded material fabricated by spark plasma sintering

Mechanical and microstructural properties of titanium/hydroxyapatite functionally graded material fabricated by spark plasma sintering

Preparation of W-Cu composites by infiltration of W skeletons – review

The Effects of Sintering Temperature on the Densification of Mechanically Alloyed W-Brass Composites

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