Arc erosion mechanism of Ag-Ti3SiC2 material

Huang, Xiaochen; Feng, Yi; Ge, Jinlong; Li, Liang; Li, Zongqun; Ding, Ming

doi:10.1016/j.jallcom.2019.152741

Cited by 26 publications

(6 citation statements)

References 59 publications

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“…Hence, the protrusion after 50 times tests is sharper than that after 100 times. Electric field (E) at the protrusion can be determined by Equation () 16,27 :

E = β E_{0}

where E 0 is the original electric field, and β is electric‐field‐enhancement factor, which is consistent with the relationship as below 28 :

β = (0.5 h false/ r) + 5

where h is the height of the protrusion, and r is the radius of the curvature of the vertex, which numerical value is inversely related to curvature. Therefore, the enhancement of the electric field intensity by the protrusion will decrease with the decrease in its height and Spc value.…”

Section: Resultsmentioning

confidence: 55%

“…Ti 3 SiC 2 can be supposed to be consisted of TiC octahedra and Si plane, 12–14 the structure illustration of Ti 3 SiC 2 is shown in Figure 1A, and the microstructure of Ti 3 SiC 2 is depicted in Figure 1B. Ti 3 SiC 2 owns the merits of both metals and ceramics, and an adequate wettability between Ag and Ti 3 SiC 2 reinforcement was found, thus Ti 3 SiC 2 has been considered as an effective reinforcing phase for silver matrix contact materials 15,16 . In our previous work, 17 the Ag/Ti 3 SiC 2 cathodes were investigated by arc eroded once in sulfur hexafluoride, nitrogen, and oxygen, respectively.…”

Section: Introductionmentioning

confidence: 96%

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Arc erosion characteristics evolution of Ag/Ti₃SiC₂ composites during repetitive arc breakdowns in SF₆ gaseous medium

Zhou

Zhao

Feng

et al. 2021

Int J Applied Ceramic Tech

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To disclose the impact of SF6 gaseous medium on Ag/Ti3SiC2 contact materials, arc discharges on the Ag/Ti3SiC2 cathodes were performed 100 times in SF6 gas at 10 kV. After 1, 50, and 100 times of arc discharges, the morphologies of arc‐eroded surfaces were characterized. The changes in breakdown strength with the number of tests were recorded. After 100 times of arc erosion, the composition of the surface was characterized, and the morphologies and compositions of the cross section were measured. In the process of multiple arc breakdowns, the arc erosion position randomly changes. In the later stage of tests, the breakdown strength of Ag/Ti3SiC2 increased. The protrusion on the arc‐eroded surface is the ignition point for the arc, the down of protrusion height and the smooth of protrusion tip were observed after multiple arc discharges, which may result in the increase in breakdown strength. After multiple arc erosion tests, Ag2S was detected on the surface by XPS, and part of silicon elements were dissociated outward from Ti3SiC2. The composition change is inferred to be one of the reasons for the rise of breakdown strength.

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“…Hence, the protrusion after 50 times tests is sharper than that after 100 times. Electric field (E) at the protrusion can be determined by Equation () 16,27 :

E = β E_{0}

where E 0 is the original electric field, and β is electric‐field‐enhancement factor, which is consistent with the relationship as below 28 :

β = (0.5 h false/ r) + 5

Section: Resultsmentioning

confidence: 55%

Section: Introductionmentioning

confidence: 96%

Arc erosion characteristics evolution of Ag/Ti₃SiC₂ composites during repetitive arc breakdowns in SF₆ gaseous medium

Zhou

Zhao

Feng

et al. 2021

Int J Applied Ceramic Tech

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“…9(d1)-9(d3)). Remarkably, after undergoing arc erosion of 6200 times, the samples displayed an increased concentration of dark aggregates surrounding Ti 3 AlC 2 in arc erosion zone and near arc erosion zone, while virtually no cracks present in any of the two zones [31,40]. However, a small number of dark aggregates were first observed in distant zone (Figs.…”

Section: Microstructure Characterization Of Ti 3 Alc 2 In Ag Basementioning

confidence: 99%

“…Compared to traditional Cd-containing and Cd-free reinforcing phases used in electrical contacts, the MAX phase is distinguished by its unique layered structure and the inherent instability of its A atomic layer. Furthermore, at high temperatures, the MAX phase undergoes a "decompositionoxidation" process, which manifests in distinct features such as self-healing, diminished arc energy, and a delay in arc destruction [26,31]. These attributes give it unparalleled advantages in its application to Ag-based electrical contacts.…”

Section: Introductionmentioning

confidence: 99%

Influence of nano-mechanical evolution of Ti ₃AlC ₂ ceramic on the arc erosion resistance of Ag-based composite electrical contact material

Wu,

Wei

et al. 2024

Journal of Advanced Ceramics

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Al-containing MAX phase ceramic has demonstrated great potential in the field of high-performance low-voltage electrical contact material. Elucidating the anti-arc erosion mechanism of the MAX phase is crucial for further improving performance, but it is not well-understood. In this study, Ag/Ti 3 AlC 2 electrical contact material was synthesized by powder metallurgy and examined by nanoindentation techniques such as constant loading rate indentation, creep testing, and continuous stiffness measurements. Our results indicated a gradual degradation in the nano-mechanical properties of the Ti 3 AlC 2 reinforcing phase with increasing arc erosion times, although the rate of this degradation appeared to decelerate over arc erosion times. Specifically, continuous stiffness measurements highlighted the uneven mechanical properties within Ti 3 AlC 2 , attributing this heterogeneity to the phase's decomposition. During the early (1-100 times) and intermediate (100-1000 times) stages of arc erosion, the decline in the nano-mechanical properties of Ti 3 AlC 2 was primarily ascribed to the decomposition of Ti 3 AlC 2 and limited surface oxidation. During the later stage of arc erosion (1000-6200 times), the inner region of Ti 3 AlC 2 also sustained arc damage, but a thick oxide layer formed on its surface, enhancing the mechanical properties and overall arc erosion resistance of the Ag/Ti 3 AlC 2 .

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“…In order to deeply analyze the arc ablation characteristics, the energy flow density of the arc injected electrode under different gas environments and pressures is calculated. Energy flow density is a key parameter to study arc characteristics, which is mainly used to evaluate the degree of arc ablation on electrodes [31,32]. The arc energy flow density is calculated by integrating the arc voltage, arc current, and arc burning time.…”

Section: Analysis Of Arc Ablation Characteristicsmentioning

confidence: 99%

Arc stability and ablation characteristics in O₂, N₂, and air environments

Dong,

Yang,

Luo

et al. 2024

Phys. Scr.

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Arcing is widely used in the processing and manufacturing of electrical materials. Arc duration and stability play a key role in the quality and efficiency of arc welding and cutting. Additionally, the generation of the arc will cause faults, failures, and even fire, and explosion in the electrical contact system. Arc is also a critical problem that threatens the safe and stable work of electrical contact systems. Therefore, a platform for arc experiment and test analysis in a multi-atmosphere environment is built in this paper. The influence of the gas environments and gas pressures on arc breaking distance and ablation characteristics is explored. The experimental results show that the oxygen environment is conducive to rapid arc extinguishing. This phenomenon is because oxygen has strong electronegativity, which makes it easy to adsorb charged particles and leads to a density decrease of charged particles. The variation of arc breaking distance and ablation characteristics under different gas environments and gas pressures is found. The influence mechanism of gas environments and gas pressures on arc breaking distance and ablation characteristics are explored. The correlation mechanism between arc breaking distance and arc ablation characteristics is revealed. The research results provide theoretical support for improving the quality of electrical material processing and manufacturing and the service life of electric contact systems. Keywords: Arc breaking distance, arc stability, arc ablation, different arcing environments

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Arc erosion mechanism of Ag-Ti3SiC2 material

Cited by 26 publications

References 59 publications

Arc erosion characteristics evolution of Ag/Ti₃SiC₂ composites during repetitive arc breakdowns in SF₆ gaseous medium

Arc erosion characteristics evolution of Ag/Ti₃SiC₂ composites during repetitive arc breakdowns in SF₆ gaseous medium

Influence of nano-mechanical evolution of Ti ₃AlC ₂ ceramic on the arc erosion resistance of Ag-based composite electrical contact material

Arc stability and ablation characteristics in O₂, N₂, and air environments

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Arc erosion mechanism of Ag-Ti3SiC2 material

Cited by 26 publications

References 59 publications

Arc erosion characteristics evolution of Ag/Ti3SiC2 composites during repetitive arc breakdowns in SF6 gaseous medium

Arc erosion characteristics evolution of Ag/Ti3SiC2 composites during repetitive arc breakdowns in SF6 gaseous medium

Influence of nano-mechanical evolution of Ti 3AlC 2 ceramic on the arc erosion resistance of Ag-based composite electrical contact material

Arc stability and ablation characteristics in O2, N2, and air environments

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Arc erosion characteristics evolution of Ag/Ti₃SiC₂ composites during repetitive arc breakdowns in SF₆ gaseous medium

Arc erosion characteristics evolution of Ag/Ti₃SiC₂ composites during repetitive arc breakdowns in SF₆ gaseous medium

Influence of nano-mechanical evolution of Ti ₃AlC ₂ ceramic on the arc erosion resistance of Ag-based composite electrical contact material

Arc stability and ablation characteristics in O₂, N₂, and air environments