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A self-heated hollow cathode made of compacted TiN powder: the preparation method and test results

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Abstract

A method for the formation of a tubular hollow self-heated cathode using magnetic-pulse pressing of a mixture of TiN (90%) and Ti (10%) powders with subsequent annealing and sintering during operation of the compact as a cathode in a high-current (5–45 А) discharge at temperatures of 2000–2200°C is described. Massive tubular cathodes with a 2.5-mm-thick wall and a large (up to 12 mm) inner diameter were manufactured. The erosion rate of a TiN cathode was 2.3 × 10–7 g/C for the operation in an Ar/N2 mixture and increased by a factor of 1.6 in the oxygen–argon plasma generation mode with separate feeding of gases.

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Correspondence to A. S. Kamenetskikh.

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Original Russian Text © N.V. Gavrilov, A.S. Kamenetskikh, S.N. Paranin, A.V. Spirin, A.V. Chukin, 2017, published in Pribory i Tekhnika Eksperimenta, 2017, No. 5, pp. 136–141.

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Gavrilov, N.V., Kamenetskikh, A.S., Paranin, S.N. et al. A self-heated hollow cathode made of compacted TiN powder: the preparation method and test results. Instrum Exp Tech 60, 742–747 (2017). https://doi.org/10.1134/S0020441217040133

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  • DOI: https://doi.org/10.1134/S0020441217040133

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