Influence of metallic additives on manganese ferrites sintering

6th International Conference: Modern Technologies for Non-Destructive Testing

Shevelev, S.A.^1 ; Luchnikov, P.A.^2 ; Yarullina, A.R.^1

National Research Tomsk Polytechnic University, Tomsk, Russia^1

Department of Metrology and Development, Moscow Technological University (MIREA), Moscow, Russia^2

关键词: Commercial grade;    Dilatometry methods;    Electric explosion;    Gaseous discharges;    Manganese ferrites;    Metallic additives;    Powder compacts;    Thermal sintering;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/289/1/012016/pdf
DOI  :  10.1088/1757-899X/289/1/012016

来源: IOP

【 摘 要 】

Influence of cuprum nanopowder additive received by electric explosion on the process of manganese ferrites MgFe2O4 consolidating at thermal sintering was researched by dilatometry method. Cuprum nanopowder at a rate of 5 mass % was added into the original commercial-grade powder of manganese ferrite MgFe2O4. Powder mixture was numerously blended with screening for better blending before pressing. Powder compacts were formed by cold one-axle static pressing. It was proved that introduction of cuprum additive caused shrinkage increase at final heating stage. There was abnormal compact enlarging at sintering in the air at isothermal stage; the specified process was not observed in vacuum. This difference can be explained by changes in conditions of gaseous discharge from volume of pores.