Effect of Ni addition on the contact resistance of Ag-WC electrical contacts

Ray, Nachiketa; Kempf, B.; Mützel, Timo; Heringhaus, F.; Froyen, Ludo; Vanmeensel, Kim; Zhang, Fei

doi:10.1016/j.jallcom.2016.02.037

Cited by 27 publications

(6 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Sanchez et al [69] concluded from their study that the hardness of the composite prepared with the centrifugal infiltration process depends on the volume fraction of the reinforcement. Similar results have also been reported in different studies [33,70,71]. From these findings, it can be inferred that the density and hardness results are in good agreement with the microstructural quantification results (area fraction and binder mean free path presented in Table 2).…”

Section: Microstructural Quantificationsupporting

confidence: 90%

Microstructure characterization and quantitative analysis of copper alloy matrix composites reinforced with WC-xNi powders prepared by spontaneous infiltration

Daoud

Miroud

Yamanoğlu

2018

J min metall B Metall

View full text Add to dashboard Cite

In this study, copper alloy matrix composites reinforced with tungsten carbide (WC) particles with the addition of different Ni contents (0, 3, 5, 7, and 10 wt.%) were prepared by the spontaneous infiltration process. Image analysis was used to quantify the microstructural parameters, such as the particle size and distribution, area fraction, binder mean free path, and pore size. The effect of Ni addition on the microstructure, density and hardness are discussed. The results show that a small addition of Ni improves the densification of the infiltrated composites. The highest density value of 11.84 g/cm 3 with a hardness of 327 HV was obtained for the infiltrated composite with the addition of 3 wt.% of Ni. The quantitative analysis results are in good agreement with the microstructure properties and hardness results.

show abstract

Section: Microstructural Quantificationsupporting

confidence: 90%

Microstructure characterization and quantitative analysis of copper alloy matrix composites reinforced with WC-xNi powders prepared by spontaneous infiltration

Daoud

Miroud

Yamanoğlu

2018

J min metall B Metall

View full text Add to dashboard Cite

show abstract

“…One can see that these attempts were made with pure metals [1,7,8,10,23,37,38,[46][47][48], binary alloys [8,10,17,18,22,24,25,[27][28][29]42,45], ternary [8][9][10]13,[15][16][17][18][19][20]26,30,[37][38][39][40][41]43,44] or ever quaternary alloys [21,26,[30][31][32][33][34][35][36]39]. A very interesting attempt was to use the strengthening nanozones in the Co matrix, based on the Co 3 W pha...…”

Section: Iron and Iron-based Alloysmentioning

confidence: 99%

WC-Based Cemented Carbides with High Entropy Alloyed Binders: A Review

Straumal

Konyashin

2023

Metals

View full text Add to dashboard Cite

Cemented carbides have belonged to the most important engineering materials since their invention in the 1920s. Commonly, they consist of hard WC grains embedded in a cobalt-based ductile binder. Recently, attempts have been made to substitute the cobalt using multicomponent alloys without a principal component (also known as high entropy alloys—HEAs). HEAs usually contain at least five components in more or less equal amounts. The substitution of a cobalt binder with HEAs can lead to the refinement of WC grains; it increases the hardness, fracture toughness, corrosion resistance and oxidation resistance of cemented carbides. For example, a hardness of 2358 HV, fracture toughness of 12.1 MPa.m1/2 and compression strength of 5420 MPa were reached for a WC-based cemented carbide with 20 wt.% of the equimolar AlFeCoNiCrTi HEA with a bcc lattice. The cemented carbide with 10 wt.% of the Co27.4Cr13.8Fe27.4Ni27.4Mo4 HEA with an fcc lattice had a hardness of 2141 HV and fracture toughness of 10.5 MPa.m1/2. These values are higher than those for the typical WC–10 wt.% Co composite. The substitution of Co with HEAs also influences the phase transitions in the binder (between the fcc, bcc and hcp phases). These phase transformations can be successfully used for the purposeful modifications of the properties of the WC-HEA cemented carbides. The shape of the WC/binder interfaces (e.g., their faceting–roughening) can influence the mechanical properties of cemented carbides. The most possible reason for such a behavior is the modification of conditions for dislocation glide as well as the development and growth of cracks at the last stages of deformation. Thus, the substitution of a cobalt binder with HEAs is very promising for the further development of cemented carbides.

show abstract

“…Essential parts of a mechanical switch contain a pair of electrical contacts made of solid metals or their oxides with superior electrical properties, such as silver metal oxides 10 and silver refractory metals. 11 The existence of the solid contact makes it possible to achieve both a low contact resistance (<50 mΩ) in the on-state and a very high isolation impedance (10 10 −10 14 Ω) in the off-state. 7 However, due to its intrinsic rigidity, solid contacts cause several inevitable issues during operation, including contact bounce, mechanical wear, surface erosion, and welding.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, some intrinsic shortcomings caused by solid-state conduction have always been the bottleneck for switch devices. Essential parts of a mechanical switch contain a pair of electrical contacts made of solid metals or their oxides with superior electrical properties, such as silver metal oxides and silver refractory metals . The existence of the solid contact makes it possible to achieve both a low contact resistance (<50 mΩ) in the on-state and a very high isolation impedance (10 10 –10 14 Ω) in the off-state .…”

Section: Introductionmentioning

confidence: 99%

Power-Level Electrical Switch Enabled by a Liquid-Metal Bridge

Zhu

Yang

Wang

et al. 2022

ACS Appl. Electron. Mater.

View full text Add to dashboard Cite

Soft electronic components possess the potential to be developed into next-generation electrical devices that can provide superior performance to solid-state counterparts. Among commonly used components, electrical switches are an essential control element in electrical and electronic systems. Both solid-state mechanical and semiconductor switches are blamed for some intrinsic shortcomings. For example, the former suffers from contact surface degradation, while the latter functions with a high conduction loss. To overcome the limitations, here, a liquid metal (LM)enabled electrical switch is reported by incorporating a Galinstan liquid bridge into a pair of solid electrodes. The electrical switch operation is realized by the coalescence of LM droplets and the breakup of the LM bridge. Extraordinarily, the device is capable of interrupting a DC 220 V, 1− 5 A circuit within 11 ms, outperforming a common mechanical switch by a factor of 4−20 in terms of interruption speed. During the breakup process of an LM bridge in the presence of a current, three regimes characterized by electrical arc behaviors are identified and investigated. The rupture distance formed before pinch-off is critical to regulate the arc plasma behaviors. The presented applications and discoveries have a vast potential in both practical technologies, involving high-current electrical and electronic equipment, and fundamental research fields relevant to soft electronics, fluid mechanics, and plasma science.

show abstract

Effect of Ni addition on the contact resistance of Ag-WC electrical contacts

Cited by 27 publications

References 22 publications

Microstructure characterization and quantitative analysis of copper alloy matrix composites reinforced with WC-xNi powders prepared by spontaneous infiltration

Microstructure characterization and quantitative analysis of copper alloy matrix composites reinforced with WC-xNi powders prepared by spontaneous infiltration

WC-Based Cemented Carbides with High Entropy Alloyed Binders: A Review

Power-Level Electrical Switch Enabled by a Liquid-Metal Bridge

Contact Info

Product

Resources

About