Electrochemical formation of Sm–Co alloys by codeposition of Sm and Co in a molten LiCl–KCl–SmCl3–CoCl2 system
摘要:
Electrocodeposition of Sm and Co on a Cu substrate was investigated in a molten LiCl-KCl-SmCl3 (0.5 mol.%)-CoCl2 (0.1 mol.%) system at 723 K. Phase of the deposited Sm-Co alloys could be controlled by electrolysis potential. SmCo3 was formed on a Cu substrate by potentiostatic electrolysis in the potential range of 0.20-0.90 V (vs. Li+/Li). Sm2Co17 was obtained in the potential range of 0.90-1.50 V. (C) 2003 Elsevier Science Ltd. All rights reserved.
Formation of Sm-Co Intermetallic Compound Nanoparticles Based on Plasma-Induced Cathodic Discharge Electrolysis in Chloride Melt
作者:M. Tokushige、H. Hongo、T. Nishikiori、Y. Ito
DOI:10.1149/2.012201jes
日期:——
Sm-Co intermetallic compound nanoparticles were obtained by utilizing plasma-induced cathodic discharge electrolysis in molten chloride electrolyte under a 1 atm Ar atmosphere. To form intermetallic nanoparticle, an electrochemical implantation method was adopted. Before conducting electrochemical implantation, we investigated the electrolytic condition to form Co nanoparticle to be used as a precursor. The size and crystal structure of the obtained Co nanoparticle strongly depended on the melt temperature. Hexagonal petaline epsilon-Co nanoparticles were obtained below 400 degrees C, and spherical alpha-Co nanoparticles were obtained above 400 degrees C. The size of the obtained spherical alpha-Co particle increased from 112 to 230 nm with increasing melt temperature. Using spherical alpha-Co nanoparticles, which were formed at 450 degrees C in the melt by plasma-induced cathodic discharge electrolysis and piled-up on the Mo plate as a working electrode, SmCo2 and SmCo3 intermetallic nanoparticles were obtained by electrochemical implantation of Sm into alpha-Co nanoparticles. (C) 2011 The Electrochemical Society. [DOI: 10.1149/2.012201jes]
Microstructures and coercivities of SmCo and Sm(Co,Cu)5 films prepared by magnetron sputtering