Thermal and electrical properties of W–Cu composite produced by activated sintering

Chen, Pingan; Luo, Guoqiang; Shen, Qiang; Li, Meijuan; Zhang, Lianmeng

doi:10.1016/j.matdes.2012.09.034

Cited by 77 publications

(17 citation statements)

References 23 publications

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“…In the last few years, a chemical-activated sintering process has been conducted to improve the sinterability by adding a certain amount of the metal activator into Mo-Cu powders. Nevertheless, these activators (such as Co, Ni, or Fe) exhibit a passive effect on the electrical and thermal properties of the M-Cu composites (M�W, Mo) [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Sintering Behavior and Properties of Mo‐Cu Composites

Sun

Liu

Wang

et al. 2018

Advances in Materials Science and Engineering

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A simple microwave-assisted aqueous solution strategy combined with a subsequent low-temperature hydrogen reduction process was used to prepare Mo-Cu nanopowders. In order to systematically investigate the densification behavior and properties of Mo-Cu composites, the densification, microstructure, hardness, electrical conductivity, thermal conductivity, and bending strength of Mo-Cu compacts were tested after sintering at different temperatures. Results show that the sintering temperature is a critical factor in the densification process of Mo-Cu composites. e shrinkage rate, density, and hardness of sintered composites increase as the temperature rises. However, too high sintering temperature resulted in the decrease in electrical conductivity (EC), thermal conductivity (TC), and bending strength. By optimizing all the performance indicators, high-performance Mo-25 wt.% Cu composites with a homogeneous microstructure accompanied with good physical and mechanical properties could be successfully obtained by sintering for 2 h at 1200°C.

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Section: Introductionmentioning

confidence: 99%

Sintering Behavior and Properties of Mo‐Cu Composites

Sun

Liu

Wang

et al. 2018

Advances in Materials Science and Engineering

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“…Typically, partially sintered (~b80% of theoretical density) tungsten is further served as the matrix impregnated with metals (such as Cu/Ag) and alkaline earth oxides and applied in electrical contact field and high current density cathode [2][3][4][5][6][7]. In these applications, porous tungsten matrix with homogeneous pore distribution and high open porosity are two key factors to obtain uniform infiltrates distribution, which has a significant influence on the performance of targeted materials.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of homogeneous tungsten porous matrix using spherical tungsten powders prepared by thermal plasma spheroidization process

Sun

Jin

et al. 2016

International Journal of Refractory Metals and Hard Materials

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“…W-Cu composite has excellent performance of tungsten and copper metal, not only showing high thermal and electrical conductivity and low coefficient of thermal expansion but also behaving features of favorable high-temperature strength, thermal shock resistance, erosion resistance, and dimensional stability [1][2][3]. W-Cu composite is a promising material in serve condition of high temperature and good thermal stability, usually being used in high-temperature components, heat sink materials and electrical contact materials [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Influence of brazing clearance on microstructure and properties of W-Cu/1Cr18Ni9 steel brazed joint with Ni-Cr-Si-B amorphous filler metal

Xia¹,

Yang²,

Zou³

et al. 2016

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W-Cu composite and 1Cr18Ni9 steel were brazed with Ni-based amorphous filler metal in a vacuum furnace. Four-point bending strength, fracture morphology, microstructure and elements distribution were studied by a series of standard methods. Then the influence of brazing clearance on microstructure and properties of the brazed joint were analyzed and discussed. Results indicated that, within the scope of the selected parameters, bending strength of the brazed joint increased significantly as reducing the brazing clearance. While the brazing clearance controlled to be 20 µm, the four-point bending strength performed the largest value, up to 333 MPa. The joint fracture showed a typical ductile fracture characteristics. Microstructure of the brazing seam was mainly composed of γ-Ni solid solution, W-Ni solid solution, CrB, and a part of eutectic phases of Ni3Si and Ni3B. The microstructure of brazed joint with brazing clearance 20 µm was more uniform and more stable. Microstructure and element of brazed joint almost transformed into single-phase solid solution. Meanwhile, micro holes disappeared and a number of brittle phases reduced, which provided well plastic reserves for the brazed joint.K e y w o r d s : W-Cu composite, brazing clearance, microstructure, fracture, bending strength

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Thermal and electrical properties of W–Cu composite produced by activated sintering

Cited by 77 publications

References 23 publications

Sintering Behavior and Properties of Mo‐Cu Composites

Sintering Behavior and Properties of Mo‐Cu Composites

Fabrication of homogeneous tungsten porous matrix using spherical tungsten powders prepared by thermal plasma spheroidization process

Influence of brazing clearance on microstructure and properties of W-Cu/1Cr18Ni9 steel brazed joint with Ni-Cr-Si-B amorphous filler metal

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