Plasma spraying of hard magnetic coatings based on Sm-Co alloys

17th International Scientific Conference "RESHETNEV READINGS"

Saunin, V.N.^1 ; Telegin, S.V.^1

Siberian State Aerospace University Named after Academician M.F. Reshetnev, 31 KrasnoyarskiyRabochiy prospect, Krasnoyarsk

660014, Russia^1

关键词: Magnetic characteristic;    Magnetic coatings;    Magnetic conductors;    Plasma sprayed;    Starting powders;    Temperature dependence;    Temperature range;    X ray structure analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/70/1/012015/pdf
DOI  :  10.1088/1757-899X/70/1/012015

来源: IOP

【 摘 要 】

Our research is focused on the formation of hard magnetic coatings by plasma spraying an arc-melted Sm-Co powder. We have studied basic magnetic characteristics depending on the components ratio in the alloy. A sample with a 40 wt.% Sm coating exhibits the highest coercive force (63 kOe) as compared to near-to-zero coercive force in the starting powder. X-ray structure analysis of the starting alloy and the coating reveals that the amount of SmCo5phase in the sprayed coating increases occupying up to 2/3 of the sample. We have also studied temperature dependence of the coating and have been able to obtain plasma sprayed permanent magnets operating within the temperature range from -100 to +500 °C. The technique used does not involve any additional thermal treatment and allows a coating to be formed right on the magnetic conductor surface irrespective of the conductor geometry.