The observation of resistivity change on the ultrasonic treated Fe-Cr ODS sinter alloy under magnetic field influence

International Conference and Exhibition in Advanced Materials and Microscopy 2017

材料科学;物理学

Silalahi, Marzuki^1 ; Purwanto, Setyo^1 ; Mujamilah, M.^1 ; Dimyati, Arbi^1

Center for Science and Technology of Advanced Materials, National Nuclear Energy Agency Kawasan, PUSPIPTEK Serpong, Tangerang Selatan

15314, Indonesia^1

关键词: Advanced materials;    Applied magnetic fields;    Influence of magnetic field;    Irradiation process;    Magnetic field influence;    Nuclear Energy Agency;    Resistivity changes;    Science and Technology;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/343/1/012037/pdf
DOI  :  10.1088/1757-899X/343/1/012037

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

About the observation of resistivity change on the ultrasonic treated Fe-Cr ODS sinter alloy under magnetic field influence. This paper reported about the observation of the resistivity change in the ultrasonic pre-treated Fe-Cr ODS sinter alloy under the influence of magnetic field at the Center for Science and Technology of Advanced Material, Nuclear Energy Agency of Indonesia. Fe-Cr ODS alloy were sinthesized by vacuum sintering of Fe- and Cr-powder dispersed Y2O3. However, before sintering the powder mixture was subjected to the irradiation process by ultrasonic for 50 hours at 20 kHz and then isostatic pressed up to 50.91 MPa to form a coin of 10 mm in diameter. LCR meassurement revealed the decreasing of resistivity about 3 times by increasing of applied magnetic field from 0 to 70 mT. In addition, VSM meassurement was performed on both as powder material and as sintered sample. The results showed increasing the magnetization with increasing magnetic field and the curve exhibits almost exact symmetry S-form with small hysterese indicating fast changing magnetization and demagnetization capability without energy loss. This opens strong speculations about the existence of magnetoresistant property of the material which is important for many application in field of sensors or electro magnetic valves.