Investigation on the microstructure and properties of W-10 wt% Cu prepared by sintering and infiltration

Ahangarkani, M.; Zangeneh-Madar, K.

doi:10.1016/j.ijrmhm.2018.03.015

Cited by 18 publications

(16 citation statements)

References 17 publications

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“…Tungsten (W) and tungsten carbide (WC) have ultrahigh melting points, high hardness, and outstanding resistance to wear and electrical erosion. These advantages can be combined with the high thermal and electrical conductivity of copper (Cu) by forming W/WC-Cu composites [ [1], [2], [3], [4], [5], [6]]. The excellent combinations of properties make the composites highly attractive for multifunctional applications.…”

Section: Introductionmentioning

confidence: 99%

“…The excellent combinations of properties make the composites highly attractive for multifunctional applications. A common use, especially for the W-Cu system, is to serve as high-voltage electrical contacts to resist the stringent arc erosion created by completing or interrupting the circuit, while simultaneously ensuring an efficient electrical conduction [ [3], [4], [5], [6], [7], [8]]. Another good case in point is their potential as heat sinks for highly-loaded plasma facing components in nuclear fusion devices owing to their good thermal conductivity and superior mechanical properties at elevated temperatures [ [9], [10], [11]].…”

Section: Introductionmentioning

confidence: 99%

“…A viable approach to fabricate W/WC-Cu composites is to infiltrate a Cu melt into the open pores of W/WC scaffolds [ [1], [2], [3], [4], [5], [6]]. This is made possible by the large gap in the melting temperatures of W/WC and Cu (the melting points are 3422 °C and 2870 °C for W and WC, respectively, but is only 1083 °C for Cu) and the minimal mutual solubility or interfacial reaction between them [14,16].…”

Section: Introductionmentioning

confidence: 99%

“…In this scenario, the structure of W/WC scaffolds can be eventually inherited by the composites which can play a key role in dictating their final properties. These scaffolds are most commonly processed with powder metallurgy techniques because of the refractory nature of W and WC [ [1], [2], [3], [4], [5], [6], [7], [8], [9], [10], [11], [12], [13], [14], [15]]. Despite its good applicability, such a method encompasses several shortcomings that may downgrade the performance of resulting composites.…”

Section: Introductionmentioning

confidence: 99%

“…Despite its good applicability, such a method encompasses several shortcomings that may downgrade the performance of resulting composites. Firstly, the scaffolds generally contain a limited fraction of pores, with porosity typically smaller than 50 vol.% [ [1], [2], [3], [4], [5], [6], [7], [8], [9], [10], [11], [12], [13], [14], [15]], to maintain their integrity during processing. This leads to a low Cu content in the infiltrated composites and accordingly restricts their thermal and electrical conductivity.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Ice-templated porous tungsten and tungsten carbide inspired by natural wood

Zhou

Tan

Jiao

et al. 2020

Journal of Materials Science & Technology

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The structures of tungsten and tungsten carbide scaffolds play a key role in determining the properties of their infiltrated composites for multifunctional applications. However, it is challenging to construct and control the architectures by means of self-assembly in W/WC systems because of their large densities. Here we present the development of unidirectionally porous architectures, with high porosities exceeding 65 vol.%, for W and WC scaffolds which in many respects reproduce the design motif of natural wood using a direct ice-templating technique. This was achieved by adjusting the viscosities of suspensions to retard sedimentation during freezing. The processing, structural characteristics and mechanical properties of the resulting scaffolds were investigated with the correlations between them explored. Quantitative relationships were established to describe their strengths based on the mechanics of cellular solids by taking into account both inter-and intra-lamellar pores. The fracture mechanisms were also identified, especially in light of the porosity. This study extends the effectiveness of the ice-templating technique for systems with large densities or particle sizes. It further provides preforms for developing new nature-inspired multifunctional materials, as represented by W/WC-Cu composites.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Ice-templated porous tungsten and tungsten carbide inspired by natural wood

Zhou

Tan

Jiao

et al. 2020

Journal of Materials Science & Technology

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Strengthening Mechanisms and Thermal Models of Chemically Incompatible Metals (Mo/W–Cu): A Review

et al. 2023

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Molybdenum (Mo) and tungsten (W) are elements of the same family with similar properties, and both of them have high hardness, mechanical strength, and electrochemical corrosion properties, [1] which are widely used in the research and application of hightemperature and arc ablation-resistant materials. [2,3] Mo-Cu and W-Cu alloys are typical pseudoalloys. [4] There is almost no reaction between tungsten and copper, molybdenum and copper in the sintering process, and almost no intermetallic compounds are produced, which is due to the great differences in crystal structure and physical properties between tungsten and copper particles, molybdenum and copper particles. [5,6] W-Cu alloys and Mo-Cu alloys are widely used in microelectronics applications, aerospace technology, and military equipment because of their excellent electrical conductivity, excellent thermal conductivity, excellent arc resistance, flame retardant of fused joints, and other attractive properties. [1,[7][8][9] The addition of Cu and other high thermal conductivity (TC) metals can make it have a thermal expansion coefficient (CTE) close to silicon and high TC. [7][8][9][10][11][12][13] When the service temperature exceeds the melting point of Cu, Cu in the material can absorb a lot of heat through the transformation of physical states such as liquefaction and evaporation, and play a role of sweating and cooling. [9] As a result, Mo/W-Cu composites (Mo-Cu and W-Cu) have excellent high-temperature resistance and better ablation resistance than pure metal Mo/W. [14][15][16][17] Mo/W-Cu composites have excellent physical and mechanical properties, but their applications are severely limited by density and interface problems. Densification and interface strengthening can improve mechanical, thermal, and electrical properties of Mo/W-Cu composites. The electrical and thermal properties of Mo/W-Cu composites are closely related to the addition of alloying elements, [6] densification of green compacts, [18,19] thermal cycle, [20] and applied pressure in the case of hot pressing. [21] At present, the study in the densification of Mo/W-Cu composites is almost about the influence of a single factor, and there is no comprehensive summary of the densification process. In the experimental process, there are also considerable difficulties in fully characterizing the microstructure, atomic structure, and chemical properties of the interface, which can be described by creating molecular dynamics models. However, there are few researches on molecular dynamics simulation of Mo/W-Cu composite.Mo/W-Cu composites are an attractive radiator material due to their combinational properties of Mo/W and Cu. [22] However, Mo/W-Cu composites materials are widely distributed in

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Arc erosion property and mechanism of tungsten–copper alloy with multi-scale tungsten particles

Wang,

Wei,

Zhang

et al. 2024

J Mater Sci

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Investigation on the microstructure and properties of W-10 wt% Cu prepared by sintering and infiltration

Cited by 18 publications

References 17 publications

Ice-templated porous tungsten and tungsten carbide inspired by natural wood

Ice-templated porous tungsten and tungsten carbide inspired by natural wood

Strengthening Mechanisms and Thermal Models of Chemically Incompatible Metals (Mo/W–Cu): A Review

Arc erosion property and mechanism of tungsten–copper alloy with multi-scale tungsten particles

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Investigation on the microstructure and properties of W-10 wt% Cu prepared by sintering and infiltration

Cited by 18 publications

References 17 publications

Ice-templated porous tungsten and tungsten carbide inspired by natural wood

Ice-templated porous tungsten and tungsten carbide inspired by natural wood

Strengthening Mechanisms and Thermal Models of Chemically Incompatible Metals (Mo/W–Cu): A Review

Arc erosion property and mechanism of tungsten–copper alloy with multi-scale tungsten particles

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Investigation on the microstructure and properties of W-10 wt% Cu prepared by sintering and infiltration