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Metals 2019, 9(3), 321;

Effects of Fe3P Addition on Sintering Behaviors and Magnetic Properties of Fe-P Alloys Sintered at Low Temperatures

Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
Author to whom correspondence should be addressed.
Received: 22 January 2019 / Revised: 4 March 2019 / Accepted: 5 March 2019 / Published: 12 March 2019
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In this paper, we demonstrate that trace amounts of P addition can activate the sintering of carbonyl powder and influence the magnetic properties of the sintered materials. Fe-x P (x = 0, 0.6, 0.8, 1.0, 1.2, 1.4, and 1.6 wt.%) samples were fabricated by doping carbonyl powder with different amounts of Fe3P. They were sintered at 1000 °C in argon for 2 h. The sintering of the Fe-0 wt.% P sample was interrupted by the ferrite-austenite transformation at 912 °C due to the low diffusion rate of the austenite. The addition of P can stabilize the ferrite, and suppress the ferrite-austenite transformation. Therefore, all the P-containing samples shrank continuously throughout the whole sintering process, which showed improved sintering densities compared to the P-free sample. However, the sintering density did not increase monotonously with increasing P content. The Fe-1.4 wt.% P and Fe-1.6wt.% P samples easily got oxidized during sintering, and the densification process was thus influenced by the P-containing oxide particles. As a result, the Fe-1.2 wt.% P sample exhibited the highest sintering density (7.664 g/cm3) and the best magnetic properties (coercive force 172 A/m). View Full-Text
Keywords: diffusion; magnetic properties; sintering behavior; Fe-P alloy diffusion; magnetic properties; sintering behavior; Fe-P alloy

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Ma, R.; Yu, K.; Liu, L.; Jiang, H.; Ye, S.; Yu, P. Effects of Fe3P Addition on Sintering Behaviors and Magnetic Properties of Fe-P Alloys Sintered at Low Temperatures. Metals 2019, 9, 321.

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