Superior Carbon Nanotube Field Emission for X-Ray Source via Metal Silicide-Induced Adhesion.

ABSTRACT: Carbon nanotube field emitters (CNT FEs) have obtained increasing attention for vacuum electronics devices such as cold cathode X-ray tubes. However, the low adhesion of CNTs on the substrate thwarts their ability to achieve high field emission current density. To this end, the effects of Ni, Si, and Al₂O₃ fillers on their adhesion both in the paste and onto the Kovar (nickel-cobalt ferrous alloy) substrate are investigated. Chemical reactions between Ni, Si, and the Kovar constituents lead to the formation of micrometer-sized protruding particles. Si fillers are key in promoting their formation in the paste and on the substrate. During high-temperature vacuum annealing, the Si fillers reacted with the Ni fillers and the Kovar constituents, forming Ni₂Si in

SUBMITTER: Abbas SZ 

PROVIDER: S-EPMC12366262 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature