Self-propagating high-temperature synthesis of the high- current emission lanthanum and niobium contained ceramics

2nd International Symposium on Fundamental Aspects of Rare-earth Elements Mining and Separation and Modern Materials Engineering

材料科学;物理学

Dolmatov, O Yu^1 ; Shamanin, I.V.^1 ; Chursin, S.S.^1

National Research Tomsk Polytechnic University, Tomsk, Russia^1

关键词: Ceramic cathodes;    Explosive emission cathode;    Graphite cathodes;    High currents;    Lanthanum hexaborides;    Self propagating high temperature synthesis;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/112/1/012045/pdf
DOI  :  10.1088/1757-899X/112/1/012045

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The paper describes the production of metal-ceramic high-current emitters containing lanthanum hexaboride LaB6by self-propagating high-temperature synthesis. Tests of emitters as explosive-emission cathodes in an OMEGA-350 microsecond accelerator are presented. Experiments show that when a metal-ceramic cathode is used, the emitted energy was 12-17% higher than that produced by tungsten and graphite cathodes and the beam "signature" is a circle with a small (∼ 15%) variation in radius.