Nitriding of zirconium cathode for arc-heater testing in air

被引：9

作者：

Momozawa, Ai ^{[1
]}

Taubert, Sven ^{[1
]}

Nomura, Satoshi ^{[1
]}

Komurasaki, Kimiya ^{[1
]}

Arakawa, Yoshihiro ^{[2
]}

机构：

[1] Univ Tokyo, Dept Adv Energy, Chiba 2778561, Japan

[2] Univ Tokyo, Dept Aeronaut & Astronaut, Bunkyo Ku, Tokyo 1138656, Japan

来源：

VACUUM | 2010年 / 85卷 / 05期

关键词：

Plasma; Arc heater; Nitriding; Oxidation; Zirconium cathode; Argon-air mixture gas; Specific enthalpy; LASER-ABSORPTION SPECTROSCOPY; PLASMA;

D O I：

10.1016/j.vacuum.2010.08.017

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Zirconium cathodes with a nitrided surface layer are promising candidates for arc-heater tests in air because of their good erosion resistance and excellent physical properties Nitriding of a zirconium cathode is performed by a microwave plasma generator Nitrided cathode, yield a stable plasma flow of argon air up to 80 A at a maximum flow rate of 4 l/min argon and 08 l/min air for a long duration The specific input power corresponds to 11 8 MJ/kg During arc-heater testing nitriding is a governing reaction and golden zirconium nitride is formed at the tip of the cathode surface The formation mechanism of a ceramic layer during microwave plasma generator treatment and arc-heater testing will also be discussed (C) 2010 Elsevier Ltd All rights reserved

引用

页码：591 / 595

页数：5

共 14 条

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