METALLIC CATHODE SURFACE MODIFICATION BY USING LOW-PRESSURE PULSED VACUUM ARC DISCHARGE
Electrical discharges in a pulsed vacuum arc system at low pressure were produced using a peak current of 100A with pulses of 30 ms. Discharges were carried out applying a voltage of 104 V between the electrodes. Materials used as cathodes were Ti, Zr, Ni, Cu, Mo, and W. The cathodes' morphology after the discharge production was studied using the scanning electron microscopy (SEM) technique. Ti and Zr presented the highest erosion. Moreover, circular craters on Ni and Mo cathodes were observed and a region of the Zr cathode, with high erosion and a high quantity of craters was analyzed. The discharge voltage for each material was measured, obtaining arc voltage values. Finally, relationships between arc voltages and some material characteristics such as the melting point and the boiling point were observed, presenting an exponential tendency.
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Universidad Nacional de Colombia
2012
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oai:scielo:S0012-735320120006000112013-01-21METALLIC CATHODE SURFACE MODIFICATION BY USING LOW-PRESSURE PULSED VACUUM ARC DISCHARGEGARCIA,LUIS ALPIDIOESCOBAR RINCÓN,DANIELDE LA ROCHE YEPES,JHONATTANARANGO ARANGO,PEDRO JOSÉRESTREPO PARRA,ELISABETH morphology spots arc voltage metallic cathodes Electrical discharges in a pulsed vacuum arc system at low pressure were produced using a peak current of 100A with pulses of 30 ms. Discharges were carried out applying a voltage of 104 V between the electrodes. Materials used as cathodes were Ti, Zr, Ni, Cu, Mo, and W. The cathodes' morphology after the discharge production was studied using the scanning electron microscopy (SEM) technique. Ti and Zr presented the highest erosion. Moreover, circular craters on Ni and Mo cathodes were observed and a region of the Zr cathode, with high erosion and a high quantity of craters was analyzed. The discharge voltage for each material was measured, obtaining arc voltage values. Finally, relationships between arc voltages and some material characteristics such as the melting point and the boiling point were observed, presenting an exponential tendency.info:eu-repo/semantics/openAccessUniversidad Nacional de ColombiaDYNA v.79 n.176 20122012-12-01info:eu-repo/semantics/articletext/htmlhttp://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0012-73532012000600011en |
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GARCIA,LUIS ALPIDIO ESCOBAR RINCÓN,DANIEL DE LA ROCHE YEPES,JHONATTAN ARANGO ARANGO,PEDRO JOSÉ RESTREPO PARRA,ELISABETH |
| spellingShingle |
GARCIA,LUIS ALPIDIO ESCOBAR RINCÓN,DANIEL DE LA ROCHE YEPES,JHONATTAN ARANGO ARANGO,PEDRO JOSÉ RESTREPO PARRA,ELISABETH METALLIC CATHODE SURFACE MODIFICATION BY USING LOW-PRESSURE PULSED VACUUM ARC DISCHARGE |
| author_facet |
GARCIA,LUIS ALPIDIO ESCOBAR RINCÓN,DANIEL DE LA ROCHE YEPES,JHONATTAN ARANGO ARANGO,PEDRO JOSÉ RESTREPO PARRA,ELISABETH |
| author_sort |
GARCIA,LUIS ALPIDIO |
| title |
METALLIC CATHODE SURFACE MODIFICATION BY USING LOW-PRESSURE PULSED VACUUM ARC DISCHARGE |
| title_short |
METALLIC CATHODE SURFACE MODIFICATION BY USING LOW-PRESSURE PULSED VACUUM ARC DISCHARGE |
| title_full |
METALLIC CATHODE SURFACE MODIFICATION BY USING LOW-PRESSURE PULSED VACUUM ARC DISCHARGE |
| title_fullStr |
METALLIC CATHODE SURFACE MODIFICATION BY USING LOW-PRESSURE PULSED VACUUM ARC DISCHARGE |
| title_full_unstemmed |
METALLIC CATHODE SURFACE MODIFICATION BY USING LOW-PRESSURE PULSED VACUUM ARC DISCHARGE |
| title_sort |
metallic cathode surface modification by using low-pressure pulsed vacuum arc discharge |
| description |
Electrical discharges in a pulsed vacuum arc system at low pressure were produced using a peak current of 100A with pulses of 30 ms. Discharges were carried out applying a voltage of 104 V between the electrodes. Materials used as cathodes were Ti, Zr, Ni, Cu, Mo, and W. The cathodes' morphology after the discharge production was studied using the scanning electron microscopy (SEM) technique. Ti and Zr presented the highest erosion. Moreover, circular craters on Ni and Mo cathodes were observed and a region of the Zr cathode, with high erosion and a high quantity of craters was analyzed. The discharge voltage for each material was measured, obtaining arc voltage values. Finally, relationships between arc voltages and some material characteristics such as the melting point and the boiling point were observed, presenting an exponential tendency. |
| publisher |
Universidad Nacional de Colombia |
| publishDate |
2012 |
| url |
http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0012-73532012000600011 |
| work_keys_str_mv |
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