WC-Cu electrical contacts developed by spark plasma sintering process

Tsakiris, Violeta; Enescu, E.; Radulian, A.; Lucaci, Mariana; Lungu, M.; Mocioi, N.; Leonat, Lucia; Cirstea, Diana C.; Caramitu, Alina Ruxandra

doi:10.1109/isfee.2016.7803212

Cited by 5 publications

(6 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Formation of metal-metal bonds by applying pressure occurs through plastic flow, creep deformation, and diffusion along surfaces and grain boundaries or the volume of one grain. Elevation of temperature causes the increase of the contact area between the materials by reducing the yield strength and increasing the diffusion rate; it also controls the removal of pores, growth of grains, and chemical reactions [ 27 ]. Thus, the diffusion bond would be created within a shorter time.…”

Section: Resultsmentioning

confidence: 99%

C.P titanium/Ti–6Al–4V joint by spark plasma welding: Microstructure and mechanical properties

Zahabi,

Mohammad Sharifi,

Naderi

et al. 2024

Heliyon

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 99%

C.P titanium/Ti–6Al–4V joint by spark plasma welding: Microstructure and mechanical properties

Zahabi,

Mohammad Sharifi,

Naderi

et al. 2024

Heliyon

View full text Add to dashboard Cite

“…The electrical conductivity of this WC-W 2 C-Cu sintered material is 24% IACS. In [12,24], materials with close compositions (53 wt.% WC-Cu and 40 wt.% WC-Cu) were manufactured. A nanocomposite of the 53 wt.% WC-Cu composition [24] exhibits a hardness of 426 HV and an electrical conductivity of 21% IACS.…”

Section: Resultsmentioning

confidence: 99%

“…The way proposed in the present work is simpler and allows reaching an excellent combination of properties. The spark plasma sintered ex situ 40 wt.% WC-Cu composite [12] showed a hardness of 226 HV and an electrical conductivity of ~40% IACS. In the approach used in the present work, the in situ synthesis of tungsten carbides in the mechanically milled mixtures is a way to improve the hardness of the material.…”

Section: Resultsmentioning

confidence: 99%

“…Copper-based materials reinforced by WC particles have high hardness, high electrical and thermal conductivity, and high wear resistance. Due to their attractive properties, WC-Cu compositions are promising as electrical contact materials [12,13], electrodes for resistance welding and electrical discharge machining [14,15], and as heat sink materials for fusion applications [16,17]. WC-Cu composites have been manufactured by nonreactive methods, such as infiltration of molten copper into a porous tungsten carbide preform [18,19], sintering of the ex-situ synthesized WC mixed with copper [12,16,20], and stir casting [13].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis of Tungsten Carbides in a Copper Matrix by Spark Plasma Sintering: Microstructure Formation Mechanisms and Properties of the Consolidated Materials

Vidyuk,

Ukhina,

Gavrilov

et al. 2023

Materials

View full text Add to dashboard Cite

In this study, the synthesis of tungsten carbides in a copper matrix by spark plasma sintering (SPS) is conducted and the microstructure formation mechanisms of the composite materials are investigated. The reaction mixtures were prepared by the high-energy mechanical milling (MM) of W, C and Cu powders. The influence of the MM time and SPS temperature on the tungsten carbide synthesis in an inert copper matrix was analyzed. It was demonstrated that the milling duration is a critical factor for creating the direct contacts between the W and C reactants and increasing the reactive transformation degree. A WC–W2C–Cu composite was fabricated from the W–C–3Cu powder mixture milled for 10 min and subjected to SPS at a temperature of 980 °C for 5 min. The formation of unconventional microstructures with Cu-rich regions is related to inter-particle melting during SPS. The WC–W2C–Cu composite showed a promising combination of mechanical and functional properties: a hardness of 300 HV, an electrical conductivity of 24% of the International Annealed Copper Standard, a residual porosity of less than 5%, a coefficient of friction in pair with a WC-6Co counterpart of 0.46, and a specific wear rate of the material of 0.52 × 10−5 mm3 N−1 m−1.

show abstract

“…[9] The high melting point, high hardness and load-bearing capacity of metal-ceramic WC particles can make them better withstand wear with reduced volume loss during frictional wear of WC/Cu composites, which are widely used in the preparation of anti-wear materials under harsh conditions. [10,11] Mechanical components, manufacturing tools, and most engineering systems (whose mating parts are in relative motion) can face serious failures due to the frictional wear resulting in significant energy dissipation, thereby making the study of frictional wear of copper matrix composites greatly important.…”

Section: Introductionmentioning

confidence: 99%

Study of metal–ceramic WC/Cu nano-wear behavior and strengthening mechanism

Zheng¹,

Chen²,

Zhu³

et al. 2023

Chinese Phys. B

View full text Add to dashboard Cite

In view of the inherent poor tribological properties of copper, the reinforcement of Copper Matrix Composites with WC particles presents a promising research area with significant industrial impact. Therefore, in that current study, a molecular dynamics approach was used to simulate the process of repeated friction of diamond grinding balls on WC/Cu composites, and the friction force, friction coefficient, abrasion depth, wear rate, abrasion morphology, von-Mises stress, internal defects, workpiece energy, and performance comparison of different layer thicknesses were systematically investigated during the multiple friction processes. It was found that the fluctuation amplitude of friction force, friction coefficient, and abrasion depth were smaller and the fluctuation frequency was larger during the initial friction, whereas near the WC phase, extreme values of the above parameters appeared and the von-Mises stress was highly concentrated while the workpiece energy continued to increase. With the repeated friction, as the number of times of friction increases, the friction force, friction coefficient, and abrasion depth fluctuation amplitude increases, the fluctuation frequency decreases, the workpiece energy appears extreme near the WC phase, and a large number of dislocation plugging, the region is strengthened, with the distance between the grinding ball and the WC phase decreases, the more obvious the strengthening effect, the stronger the workpiece anti-wear ability.

show abstract

WC-Cu electrical contacts developed by spark plasma sintering process

Cited by 5 publications

References 12 publications

C.P titanium/Ti–6Al–4V joint by spark plasma welding: Microstructure and mechanical properties

C.P titanium/Ti–6Al–4V joint by spark plasma welding: Microstructure and mechanical properties

Synthesis of Tungsten Carbides in a Copper Matrix by Spark Plasma Sintering: Microstructure Formation Mechanisms and Properties of the Consolidated Materials

Study of metal–ceramic WC/Cu nano-wear behavior and strengthening mechanism

Contact Info

Product

Resources

About