Comparative study of densification and microstructural development in W–18Cu composites using microwave and conventional heating

Mondal, Avijit; Upadhyaya, Anish; Agrawal, Dinesh Kumar

doi:10.1179/143307510x12820854748638

Cited by 21 publications

(18 citation statements)

References 16 publications

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“…W-Cu materials are of a major interest for thermal-electrical applications like electrical contacts used in low voltage (LV), medium voltage (MV) and high voltage (HV) switching devices working in vacuum, sulfur hexafluoride (SF 6 ) gas or oil [1][2][3][4][5][6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…W-Cu materials are commonly used for arcing contacts in SF 6 gas or oil CBs for MV and HV applications [5][6][7][8][9][10][11][12][13][14]. Functional properties of W-Cu materials are influenced by their microstructure and physical, electrical, thermal and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

“…W-Cu composites are considered as pseudo-alloys and advanced engineering materials due to their specific physical, electrical, thermal and mechanical properties. W-Cu powder mixtures are produced by various methods, from which the common methods are mechanical mixing, mechanical alloying and high energy ball milling of elemental powders in dry or wet conditions [2][3][4][5][6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…High sintering temperatures or long holding times help to improve the densification but Cu may leach out from the skeleton which leads to Cu segregation and results in non-homogeneous microstructure and poor product performance [7,8]. Therefore it is necessary the achievement of new W-Cu composites by alternative techniques than conventional ones like spark plasma sintering (SPS) to minimize microstructure coarsening and to improve homogeneity of contact materials [2,3,[16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Development and Investigation of Tungsten Copper Sintered Parts for Using in Medium and High Voltage Switching Devices

Lungu¹,

Lucaci²,

Tsakiris³

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Development and Investigation of Tungsten Copper Sintered Parts for Using in Medium and High Voltage Switching Devices

Lungu¹,

Lucaci²,

Tsakiris³

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

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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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Recent Advances in W–Cu Composites: A Review on the Fabrication, Application, Property, Densification, and Strengthening Mechanism

Zhang,

Yang,

Huang

et al. 2023

Adv Eng Mater

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Tungsten–copper (W–Cu) composite is a pseudoalloy prepared by powder metallurgy method with tungsten and copper as the main components, which are widely used in electrical contacts, electrical discharge machining electrodes, electronic packaging, aerospace, and military fields due to its good conductivity, thermal conductivity, high melting point, high electrical breakdown strength, low contact resistance, high welding resistance, and high heat resistance. Herein, the recent advances of W–Cu composites are reviewed systematically. First, the preparative techniques of W–Cu composites are introduced in detail, and their advantages and disadvantages are evaluated objectively. Second, an introduction of the main application fields and corresponding characteristics advantages for W–Cu composites are provided. Subsequently, the densification techniques and strengthening mechanisms and their effects on microstructure, mechanical properties, and physical properties of W–Cu composites are mainly discussed. Finally, based on a comprehensive review of W–Cu composites, its future development trends and potential research challenges are summarized and prospected.

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Comparative study of densification and microstructural development in W–18Cu composites using microwave and conventional heating

Cited by 21 publications

References 16 publications

Development and Investigation of Tungsten Copper Sintered Parts for Using in Medium and High Voltage Switching Devices

Development and Investigation of Tungsten Copper Sintered Parts for Using in Medium and High Voltage Switching Devices

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

Recent Advances in W–Cu Composites: A Review on the Fabrication, Application, Property, Densification, and Strengthening Mechanism

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