Evidence of chromium-cobalt binary cluster formation by pulsed laser evaporation

Abstract

Intermetallic clusters are observed in the Co-Cr system. We report on the use of time of flight mass spectroscopy to investigate the cluster spectrum resulting from Nd-YAG ablation of a CoCr target. Cr + clusters dominated the spectrum, with Co + clusters as the second most intense peak, and we found a clearly resolved Cr-Co binary cluster that could be suitable for co-doping during the growth of laser crystals. Significant contributions from elemental dimers as well as some oxide clusters were also observed. Density functional calculations indicated that formation of the observed intermetallic clusters was thermodynamically favorable.

Formation of a Calcium Phosphate Layer with Immobilized Cobalt Chromite Nanoparticles on Cobalt−Chromium Alloy by a Laser-Assisted Biomimetic Process

“…Nanoparticle formation via laser ablation of target materials has been reported elsewhere [29]. It has also been reported that Co−Cr binary clusters along with Cr + and Co + clusters are formed via laser ablation of a Co−Cr target [30]. These clusters may be involved in the formation of the CoCr 2 O 4 nanoparticles in the LAB process.…”