Directly Writing Patterning of Conductive Material by High Voltage Induced Weak Electric Arc Machining (HV-μEAM)

Peng, Zilong; Feng, Tianming; Wei, Zilong; Zhang, Yong; Li, Yinan

doi:10.3390/coatings9090538

Cited by 7 publications

(6 citation statements)

References 43 publications

(42 reference statements)

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“…The XRD results shown in Figure 7c indicate that the Fe3Al phase was formed in the Fe-Al MNS. Because of the high temperature and pressure during the electrical discharge process of the Fe-Al electrode [27,28], the gap between the Fe-Al electrode and working piece acted like a sintering furnace, which promoted the formation of the Fe3Al phase in the coating. In addition, the intensity of characteristic peaks for the AlFe3C0.5 phase, showing in Figure 7c, decrease with the increasing gap voltage, indicating that the content of AlFe3C0.5 phase in Fe-Al MNS decreases.…”

Section: Surface Morphology and Chemical Compositionmentioning

confidence: 99%

Fabrication of Fe‒Al Coatings with Micro/Nanostructures for Antifouling Applications

Wang

Fan

et al. 2020

Coatings

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Fouling is one of the common problems in heat-transfer applications, resulting in higher fouling resistance, and lower heat-transfer coefficient. This paper introduces the design and fabrication of an Fe–Al coating with micro/nanostructures on low-carbon steel by electrical discharge coating (EDC) technology to improve the antifouling property. The Fe–Al coating with micro/nanostructures is characterized by a large number of micro/nanostructures and superior anti-fouling property, which is attributed to its hydrophobic surface. The antifouling property, fouling induction period and contact angle of the Fe–Al coating with micro/nanostructures increase with the increasing gap voltage. Compared with the polished surface of low-carbon steel, the Fe–Al coating with micro/nanostructures extends the induction period from 214 to 1350 min, with a heat flux of 98 kW·m−2. After 50 adhesion tests, the contact angle of the Fe–Al coating with micro/nanostructures decreases from 6.81% to 27.52%, which indicates that the Fe–Al coating with micro/nanostructures is durable and suitable for industrial applications.

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Section: Surface Morphology and Chemical Compositionmentioning

confidence: 99%

Fabrication of Fe‒Al Coatings with Micro/Nanostructures for Antifouling Applications

Wang

Fan

et al. 2020

Coatings

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“…From Equation (1), it can be found that the current density depends on electric field intensity, the higher the electric field intensity, the higher the current density. Considering the geometrical shape of the micro-peaks, the enhanced electric field at the micro-peaks on the electrode surface can be expressed as follows [19]: E p = U r t 0.75 l g 0.25 (2) where r t is the tip radius of micro-peaks (m), U is the voltage between electrodes, l g is the discharge gap (m).…”

Section: Formation and Expansion Of Discharge Plasmas Of Micro-edmmentioning

confidence: 99%

“…In recent years, more and more attention has been paid to precision machining technology and methods [1,2]. As one of the most popular microfabrication methods, micro-electrical discharge machining (micro-EDM) has been widely applied to fabricate various difficult-to-cut materials [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Study on the Time-Varying Characteristics of Discharge Plasma in Micro-Electrical Discharge Machining

Liu

Zhang

et al. 2019

Coatings

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Micro electrical discharge machining (micro-EDM) has been widely applied in the field of precision machining, but the machining mechanism is still unclear. In this paper, the relationship between the characteristics of discharge plasma and discharge duration is clarified by analyzing the formation and expansion process of the discharge plasma channel under micro-scale discharge conditions. Based on the experimental results, the effects of discharge duration on the discharge current, discharge voltage and discharge crater size are discussed. The results show that the expansion acceleration, internal pressure, temperature, and electron density of the discharge plasma decrease as the discharge duration increase, while the radius and expansion velocity of the discharge plasma increase, and finally the discharge plasma reaches the state of shape–position equilibrium. The resistance of discharge plasma is estimated to fluctuate in the range of 38–45 Ω by the ratio of discharge maintenance voltage to discharge current. The energy utilization rate of micro-EDM is very high when discharge duration is less than 4 μs, and then decreases gradually as the discharge duration increased. There is a positive linear relationship between discharge crater volume and discharge duration. The discharge duration has no significant effect on the discharge crater depth. This study provides a theoretical basis for further study of discharge plasma characteristics in micro-EDM.

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“…With the increasing market demand for miniaturization and the precision of products, micro-processing technology has become one of the important indicators to measure a country's scientific and technological strength [1][2][3]. Micro-electrical discharge machining (micro-EDM) has become one of the most popular microfabrication technologies due to the advantage of machining electrically conductive materials without direct contact [4][5][6]. Micro-EDM has been has attracted great attention from researchers and has been widely used in the micro-machining field [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Study on the Discharge Characteristics of Single-Pulse Discharge in Micro-EDM

Liu

Zhang

et al. 2020

Micromachines

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To further study the discharge characteristics and machining mechanism of micro-electrical discharge machining (micro-EDM), the variation trends of the discharge energy and discharge crater size with actual discharge duration are discussed based on single-pulse experiments. The polarity effect of micro-EDM was analyzed according to the motion characteristics of electrons and ions in the discharge plasma channel. The results show that the discharge current and voltage of micro-EDM were independent of the discharge width and open-circuit voltage. The energy utilization rate of the short-pulse discharge was relatively high, and the energy utilization rate decreased gradually as the discharge duration increased. Even if the mass of the positive ion was much larger than that of the electron, the kinetic energy of the positive ion was still less than that of the electron when bombarding the surface of the electrode. The acceleration and speed of electrons were very high, and the number of times that electrons bombarded the surface of positive electrode was more than 600 times that of positive ions bombarding the surface of the negative electrode during the same time.

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Directly Writing Patterning of Conductive Material by High Voltage Induced Weak Electric Arc Machining (HV-μEAM)

Cited by 7 publications

References 43 publications

Fabrication of Fe‒Al Coatings with Micro/Nanostructures for Antifouling Applications

Fabrication of Fe‒Al Coatings with Micro/Nanostructures for Antifouling Applications

Study on the Time-Varying Characteristics of Discharge Plasma in Micro-Electrical Discharge Machining

Study on the Discharge Characteristics of Single-Pulse Discharge in Micro-EDM

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