Pub Date : 2016-09-01DOI: 10.1109/DEIV.2016.7763958
Wei Zhong, Yunlong Liu, A. Xu, Shaohuang Shang, D. Jin
Electrode erosion and particulate sputtering would be inevitable in gas spark gap, which could affect its dielectric performance and reliability. To analyze the process of electrode-to-electrode sputtering in gas spark gap, this paper conducted discharge experiments between Mo and W electrodes and analyzed the results with scanning electron microscopy (SEM). Results indicated that main electrodes began sputtering particles to each other after 10 shots, and its distribution range extended with larger sputtering velocities and angles. However, even after only one shot, W particulates are sputtered and found on the surface of opposite electrode, its diameters being 1.5μm or so. And clear erosion cracks, pits and sputtered particulates for tungsten are observed more early than molybdenum. After 500 or even more shots, craters and cracks of the erosion that appear on the Mo electrode surface become more and more significant, and finally more heavy than W electrodes. It is reasonable that electrodes erosion (cracks, craters, sputtered particulates etc.) could be related to fatigue life of electrode materials.
{"title":"Experimental investigation of electrode erosion of triggered spark gap","authors":"Wei Zhong, Yunlong Liu, A. Xu, Shaohuang Shang, D. Jin","doi":"10.1109/DEIV.2016.7763958","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7763958","url":null,"abstract":"Electrode erosion and particulate sputtering would be inevitable in gas spark gap, which could affect its dielectric performance and reliability. To analyze the process of electrode-to-electrode sputtering in gas spark gap, this paper conducted discharge experiments between Mo and W electrodes and analyzed the results with scanning electron microscopy (SEM). Results indicated that main electrodes began sputtering particles to each other after 10 shots, and its distribution range extended with larger sputtering velocities and angles. However, even after only one shot, W particulates are sputtered and found on the surface of opposite electrode, its diameters being 1.5μm or so. And clear erosion cracks, pits and sputtered particulates for tungsten are observed more early than molybdenum. After 500 or even more shots, craters and cracks of the erosion that appear on the Mo electrode surface become more and more significant, and finally more heavy than W electrodes. It is reasonable that electrodes erosion (cracks, craters, sputtered particulates etc.) could be related to fatigue life of electrode materials.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134409688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-09-01DOI: 10.1109/DEIV.2016.7763946
Hou Chunguang, Yu Xiao, Cao Yundong, Lai Changxue, Cao Yuchen
In order to improve the prediction accuracy of phase controlled switching operation time, restrain overvoltage and inrush current when the circuit breaker switched on, this paper establishs BP network prediction model based on voltage and ambient temperature as the main input parameters, and weights the uncertainty influence factors such as aging and wear. In order to improve the accuracy of prediction model, proposing a method of BP neural network based on particle swarm optimization (PSO), comparing network prediction performance before and after algorithm optimized. The research results show that use the BP neural network based on PSO is more accurate than the prediction results which only by BP neural network predicts, the error of BP neural network based on PSO can control the predictive error within 0.2% and meet the requirement of synchronization control.
{"title":"Prediction of synchronous closing time on permanent magnet actuator for vacuum circuit breaker based on PSO-BP","authors":"Hou Chunguang, Yu Xiao, Cao Yundong, Lai Changxue, Cao Yuchen","doi":"10.1109/DEIV.2016.7763946","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7763946","url":null,"abstract":"In order to improve the prediction accuracy of phase controlled switching operation time, restrain overvoltage and inrush current when the circuit breaker switched on, this paper establishs BP network prediction model based on voltage and ambient temperature as the main input parameters, and weights the uncertainty influence factors such as aging and wear. In order to improve the accuracy of prediction model, proposing a method of BP neural network based on particle swarm optimization (PSO), comparing network prediction performance before and after algorithm optimized. The research results show that use the BP neural network based on PSO is more accurate than the prediction results which only by BP neural network predicts, the error of BP neural network based on PSO can control the predictive error within 0.2% and meet the requirement of synchronization control.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134591615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-09-01DOI: 10.1109/DEIV.2016.7748668
Xiaoshe Zhai, W. Zhang, X. Yao, Yajun Guo, Jianhua Wang, Yingsan Geng, Zhiyuan Liu
The objective of this paper is to experimentally investigate the distribution of high-voltage and high-frequency (HVHF) impulse breakdown sparks in conditioned contact surface. A 10 kV commercial vacuum interrupter (VI) is used, which is machined with a glass envelope and an observing window on the main shield. The distribution of the breakdown position in contact surface follows the Gaussian probability density. The breakdown sparks gradually concentrate in the center of contact surface, with a continue applying of the impulse voltage after a sufficient conditioning process. The frequency of the impulse voltage has slight impact on the distribution of breakdown sparks. However, a higher amplitude of the impulse voltage results in a more concentrative distribution of the breakdown sparks. The larger of the contact gap, the more concentrative of the breakdown sparks in contact surface. The mean value μ of the breakdown position in contact surface shifts to the lower h value of the contact edge gap. The higher of the non-parallelism of the facing contact surface, the more concentrative of the breakdown sparks.
{"title":"Distribution of high-voltage and high frequency impulse breakdown sparks in conditioned contact surface","authors":"Xiaoshe Zhai, W. Zhang, X. Yao, Yajun Guo, Jianhua Wang, Yingsan Geng, Zhiyuan Liu","doi":"10.1109/DEIV.2016.7748668","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7748668","url":null,"abstract":"The objective of this paper is to experimentally investigate the distribution of high-voltage and high-frequency (HVHF) impulse breakdown sparks in conditioned contact surface. A 10 kV commercial vacuum interrupter (VI) is used, which is machined with a glass envelope and an observing window on the main shield. The distribution of the breakdown position in contact surface follows the Gaussian probability density. The breakdown sparks gradually concentrate in the center of contact surface, with a continue applying of the impulse voltage after a sufficient conditioning process. The frequency of the impulse voltage has slight impact on the distribution of breakdown sparks. However, a higher amplitude of the impulse voltage results in a more concentrative distribution of the breakdown sparks. The larger of the contact gap, the more concentrative of the breakdown sparks in contact surface. The mean value μ of the breakdown position in contact surface shifts to the lower h value of the contact edge gap. The higher of the non-parallelism of the facing contact surface, the more concentrative of the breakdown sparks.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129481593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-09-01DOI: 10.1109/DEIV.2016.7748721
Cong Wang, Z. Shi, Bingzhou Wu, S. Jia, Lijun Wang
In this paper, the dynamic of single cathode spot (CS) in external transverse magnetic field (TMF) up to 200mT is investigated experimentally. The constant arc current of 40A is used in this work, with which there is only one CS. Experiments are conducted with Cu and CuCr25 butt contacts in a demountable vacuum chamber. The gap distance is fixed at 4mm. The uniform constant TMF (Bt) within the inter-contacts region is supplied by Nd-Fe-B permanent magnets. Images of CS are photographed through the observation window by a digital high-speed camera with an exposure time of 2μs. Experimental results show that the velocity Vr of retrograde motion of CS on both Cu and CuCr25 cathode increases linearly with external TMF with a proportional coefficient Kr in a certain range of Bt, and then increases nonlinearly and slowly with further increased of Bt. The proportional coefficients Kr are about 109 m/(s T) and 190 m/(s T) respectively for Cu and CuCr25 cathode.
{"title":"Experimental investigation on the dynamic of cathode spot of vacuum arc in external transverse magnetic field","authors":"Cong Wang, Z. Shi, Bingzhou Wu, S. Jia, Lijun Wang","doi":"10.1109/DEIV.2016.7748721","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7748721","url":null,"abstract":"In this paper, the dynamic of single cathode spot (CS) in external transverse magnetic field (TMF) up to 200mT is investigated experimentally. The constant arc current of 40A is used in this work, with which there is only one CS. Experiments are conducted with Cu and CuCr25 butt contacts in a demountable vacuum chamber. The gap distance is fixed at 4mm. The uniform constant TMF (Bt) within the inter-contacts region is supplied by Nd-Fe-B permanent magnets. Images of CS are photographed through the observation window by a digital high-speed camera with an exposure time of 2μs. Experimental results show that the velocity Vr of retrograde motion of CS on both Cu and CuCr25 cathode increases linearly with external TMF with a proportional coefficient Kr in a certain range of Bt, and then increases nonlinearly and slowly with further increased of Bt. The proportional coefficients Kr are about 109 m/(s T) and 190 m/(s T) respectively for Cu and CuCr25 cathode.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":" 38","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113949498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-09-01DOI: 10.1109/DEIV.2016.7748667
Yingyao Zhang, Yuhao Fang, Lijun Jin, Yewen Zhang
The objective of this paper is to study the microscopic electric field on contact surface in vacuum interrupters based on fractal theory, with considering the contact surface roughness. Firstly, the fractal theory is introduced into the application of vacuum breakdown studies. The micro-protrusion on the contact surface is modelled based on the W-M fractal function, with the different contact surface roughness 1.6 um and 3.2 um. Then, the electric field distribution in the contact gap is simulated. With considering the amount of calculation time and the accuracy of calculation, multi-zone mesh generation is used to improve the accuracy of the simulation. The results can provide some useful information to study vacuum breakdown phenomena.
{"title":"Study of microscopic electric field on contact surface in vacuum interrupters based on fractal theory","authors":"Yingyao Zhang, Yuhao Fang, Lijun Jin, Yewen Zhang","doi":"10.1109/DEIV.2016.7748667","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7748667","url":null,"abstract":"The objective of this paper is to study the microscopic electric field on contact surface in vacuum interrupters based on fractal theory, with considering the contact surface roughness. Firstly, the fractal theory is introduced into the application of vacuum breakdown studies. The micro-protrusion on the contact surface is modelled based on the W-M fractal function, with the different contact surface roughness 1.6 um and 3.2 um. Then, the electric field distribution in the contact gap is simulated. With considering the amount of calculation time and the accuracy of calculation, multi-zone mesh generation is used to improve the accuracy of the simulation. The results can provide some useful information to study vacuum breakdown phenomena.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114412435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-09-01DOI: 10.1109/DEIV.2016.7748696
M. Weuffel, D. Gentsch, G. Nikolić, A. Schnettler
Due to the impact of arcing on the high purity surfaces and bound residual gases, current interruption operations may influence the internal pressure in vacuum interrupters (VIs). In this paper, we investigate the temporal development of internal pressure in VIs immediately after a current interruption operation, non-intrusively using the magnetron method. By means of an experimental test setup that consists of a vacuum test system to vary the internal pressure in punctured, non-vented VIs with active getter materials, experimental test series were performed under variation of internal pressure and arcing time. The experimental results indicate that arcing during the interruption operation predominantly causes a significant decrease in the internal pressure of up to two orders of magnitude, depending on the arcing time and the initial pressure before the current interruption operation. We also discuss the impact of the observed pressure reduction effect on the possibility of predicting the remaining service life of installed VIs.
{"title":"The influence of current interruption operations on internal pressure in vacuum interrupters","authors":"M. Weuffel, D. Gentsch, G. Nikolić, A. Schnettler","doi":"10.1109/DEIV.2016.7748696","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7748696","url":null,"abstract":"Due to the impact of arcing on the high purity surfaces and bound residual gases, current interruption operations may influence the internal pressure in vacuum interrupters (VIs). In this paper, we investigate the temporal development of internal pressure in VIs immediately after a current interruption operation, non-intrusively using the magnetron method. By means of an experimental test setup that consists of a vacuum test system to vary the internal pressure in punctured, non-vented VIs with active getter materials, experimental test series were performed under variation of internal pressure and arcing time. The experimental results indicate that arcing during the interruption operation predominantly causes a significant decrease in the internal pressure of up to two orders of magnitude, depending on the arcing time and the initial pressure before the current interruption operation. We also discuss the impact of the observed pressure reduction effect on the possibility of predicting the remaining service life of installed VIs.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"133 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116719342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-09-01DOI: 10.1109/DEIV.2016.7748742
A. Murzakaev
The present paper reports an experimental study of craters on the surface of cathodes of pulsed arc under the influence of surface conditions (contaminants and clean), weak transverse magnetic fields in vacuum and ambient gases (argon, nitrogen with high purity introduced with pressures from 50 Torr up to 800 Torr) with cold cathodes. The autograph method was used to investigate the arc spot motion over a cathodes under a magnetic field of H = 0.1-0.7 T in the range of current 2-50 A. Erosion traces have been studied of wires cathodes from Au, Ag, Cu, W. The analysis of arc voltage and arc current fluctuations in vacuum and in gas shows that the spot operates in cycles that include extremely non-stationary periods with time constants about 10-50 ns for all cathodes from Au, Ag, Cu, W. At the surfaces of Au, Ag, Cu cathodes in vacuum and in gases there remain numerous small craters (diameter <; 6 mkm). Such spots are type 1, in contrast to clean surface spots (type 2). Erosion traces clean surfaces of W cathodes in vacuum and in gases consist of overlapping craters which form a coherent chain. It appears that the elementary spot processes (plasma production, electron emission, retrograde movement, average cycle duration, current density) are not changed by outer influences as magnetic field or background gas. The current density measured at the moment of cathode spot death is (1 ± 0.9) × 1011 A/m2. Neither the current density nor the cathode spot lifetime depends on current.
{"title":"The autograph method for investigation arcs in vacuum and in gases at threshold currents","authors":"A. Murzakaev","doi":"10.1109/DEIV.2016.7748742","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7748742","url":null,"abstract":"The present paper reports an experimental study of craters on the surface of cathodes of pulsed arc under the influence of surface conditions (contaminants and clean), weak transverse magnetic fields in vacuum and ambient gases (argon, nitrogen with high purity introduced with pressures from 50 Torr up to 800 Torr) with cold cathodes. The autograph method was used to investigate the arc spot motion over a cathodes under a magnetic field of H = 0.1-0.7 T in the range of current 2-50 A. Erosion traces have been studied of wires cathodes from Au, Ag, Cu, W. The analysis of arc voltage and arc current fluctuations in vacuum and in gas shows that the spot operates in cycles that include extremely non-stationary periods with time constants about 10-50 ns for all cathodes from Au, Ag, Cu, W. At the surfaces of Au, Ag, Cu cathodes in vacuum and in gases there remain numerous small craters (diameter <; 6 mkm). Such spots are type 1, in contrast to clean surface spots (type 2). Erosion traces clean surfaces of W cathodes in vacuum and in gases consist of overlapping craters which form a coherent chain. It appears that the elementary spot processes (plasma production, electron emission, retrograde movement, average cycle duration, current density) are not changed by outer influences as magnetic field or background gas. The current density measured at the moment of cathode spot death is (1 ± 0.9) × 1011 A/m2. Neither the current density nor the cathode spot lifetime depends on current.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128736070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-09-01DOI: 10.1109/DEIV.2016.7763964
Y. Inada, T. Kamiya, S. Matsuoka, A. Kumada, H. Ikeda, K. Hidaka
The development of high-capacity vacuum circuit breakers requires the fundamental understanding of the dependence of vacuum arc behaviours on electrode materials. Here, the vacuum arc behaviours are strongly dependent on two-dimensional electron and metal vapour densities over vacuum arc discharges. Therefore, direct diagnosis of these particle densities over vacuum arcs is quite important. However, almost all particle density measurements have been conducted using only Cu electrodes and few experimental results are available in literature about correlation between vacuum arc properties and electrode materials. In this study, we performed 2-dimensional electron density imaging over vacuum arcs generated between Cu electrodes and CuCr (Cu75:Cr25wt%) electrodes.
{"title":"Comparative study between Cu and CuCr electrode using two-dimensional particle density image over vacuum arc discharge","authors":"Y. Inada, T. Kamiya, S. Matsuoka, A. Kumada, H. Ikeda, K. Hidaka","doi":"10.1109/DEIV.2016.7763964","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7763964","url":null,"abstract":"The development of high-capacity vacuum circuit breakers requires the fundamental understanding of the dependence of vacuum arc behaviours on electrode materials. Here, the vacuum arc behaviours are strongly dependent on two-dimensional electron and metal vapour densities over vacuum arc discharges. Therefore, direct diagnosis of these particle densities over vacuum arcs is quite important. However, almost all particle density measurements have been conducted using only Cu electrodes and few experimental results are available in literature about correlation between vacuum arc properties and electrode materials. In this study, we performed 2-dimensional electron density imaging over vacuum arcs generated between Cu electrodes and CuCr (Cu75:Cr25wt%) electrodes.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134343141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-09-01DOI: 10.1109/DEIV.2016.7764029
K. Savkin, E. Oks, V. Gushenets, V. Frolova, A. Nikolaev, G. Yushkov
The paper reports on a mass-charge spectrometry study of ion beams extracted from the plasma of a vacuum arc discharge with a compound lanthanum hexaboride cathode. The elemental composition of the ion beams was analyzed using a magnetic separator. The vacuum arc operated in repetitive pulsed mode with a current amplitude of 140 A, full width at the base of ~350 μs, and frequency of 2 Hz. The ion-extracting dc voltage was 20 kV. The absolute currents of B+, B2+, and B3+ ions were several hundred microamperes. The extraction of mono-element B ion beams with a low energy spread from the plasma of a vacuum arc is attractive for use in ion beam boriding technologies.
{"title":"Vacuum arc ion source with compound cathode and beam separation by bending magnet","authors":"K. Savkin, E. Oks, V. Gushenets, V. Frolova, A. Nikolaev, G. Yushkov","doi":"10.1109/DEIV.2016.7764029","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7764029","url":null,"abstract":"The paper reports on a mass-charge spectrometry study of ion beams extracted from the plasma of a vacuum arc discharge with a compound lanthanum hexaboride cathode. The elemental composition of the ion beams was analyzed using a magnetic separator. The vacuum arc operated in repetitive pulsed mode with a current amplitude of 140 A, full width at the base of ~350 μs, and frequency of 2 Hz. The ion-extracting dc voltage was 20 kV. The absolute currents of B+, B2+, and B3+ ions were several hundred microamperes. The extraction of mono-element B ion beams with a low energy spread from the plasma of a vacuum arc is attractive for use in ion beam boriding technologies.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133420759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-09-01DOI: 10.1109/DEIV.2016.7764019
E. Vardanyan, I. Yagafarov, K. Ramazanov, A. Khamzina, N. A. Amirhanova
Corrosive attack is one of the most frequent reasons of machine components failure. As is known part service properties substantially depend on surface layer state and structure, obtained after complete processing. Various coatings are widely used to improve service properties. It is also known that an intermetallic compounds are beneficial in many aspects. Ti-Al coatings were compared in the studied. The coatings were deposited by vacuum arc plasma. An intermetallic compound was synthesized during the Ti-Al coating deposition. Phase composition and corrosion behavior of the coatings were investigated by means X-ray diffraction and electrochemical tests. Potentiodynamic curves in corrosive medium were made before and after coating deposition on heat-resistant high alloy steel. Corrosion currents were calculated using the potentiodynamic curves. General regularities of the steel corrosion were established using the potentiodynamic curves. Interdependence between surface state phase composition and corrosion rate was studied.
{"title":"Influence of structure and TiAl3/TiAlN intermetallic coatings on the corrosion behavior of austenics steels","authors":"E. Vardanyan, I. Yagafarov, K. Ramazanov, A. Khamzina, N. A. Amirhanova","doi":"10.1109/DEIV.2016.7764019","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7764019","url":null,"abstract":"Corrosive attack is one of the most frequent reasons of machine components failure. As is known part service properties substantially depend on surface layer state and structure, obtained after complete processing. Various coatings are widely used to improve service properties. It is also known that an intermetallic compounds are beneficial in many aspects. Ti-Al coatings were compared in the studied. The coatings were deposited by vacuum arc plasma. An intermetallic compound was synthesized during the Ti-Al coating deposition. Phase composition and corrosion behavior of the coatings were investigated by means X-ray diffraction and electrochemical tests. Potentiodynamic curves in corrosive medium were made before and after coating deposition on heat-resistant high alloy steel. Corrosion currents were calculated using the potentiodynamic curves. General regularities of the steel corrosion were established using the potentiodynamic curves. Interdependence between surface state phase composition and corrosion rate was studied.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125989127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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