Pulsed non-self-sustained glow discharge with a large-area hollow cathode for nitriding of iron-based alloys

International Scientific Conference on "Radiation-Thermal Effects and Processes in Inorganic Materials"

材料科学;物理学

Denisov, V.V.^1 ; Akhmadeev, Yu.H.^1 ; Lopatin, I.V.^1 ; Schanin, P.M.^1 ; Kovalsky, S.S.^1 ; Koval, N.N.^1 ; Yakovlev, V.V.^1

Institute of High Current Electronics SB RAS, Tomsk

634055, Russia^1

关键词: Cold hollow cathode;    Glow discharge plasmas;    Hollow cathodes;    Iron-based alloy;    Nitrided layer;    Pulse currents;    Pulsed glow discharge;    Thermal shields;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/81/1/012067/pdf
DOI  :  10.1088/1757-899X/81/1/012067

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The paper reports on a study of a pulsed non-self-sustained glow discharge with a hollow cathode area of 2.3 m2and pulse current of up to 370 A. The ignition and operation of the discharge at low pressures (0.4-1 Pa) was sustained through electron injection from the plasma of an arc discharge based on a cold hollow cathode. The current-voltage characteristics of the pulsed glow discharge were measured. Specimens of 12 Cr18Ni10Ti, Cr12, and 40Cr steels were nitrided in the glow discharge plasma with double thermal shields at a temperature of 520 °C and pressure of 0.9 Pa for 4 h. The nitrided layer thickness for 40Cr, Cr12, and 12Cr18Ni10Ti steels was 240, 90, and 50 μm, respectively.