Preparation of Fe₇₆Si₉B₁₀P₅ Nanocrystalline Magnetic Cores by Direct-Nanocrystallizing Method during Spark-Plasma Sintering

Abstract:

Bulk nanocrystalline Fe₇₆Si₉B₁₀P₅ magnetic cores were sintered using spark-plasma technique through direct-nanocrystallizing method by Fe₇₆Si₉B₁₀P₅ amorphous alloy gas atomization powder. The saturated magnetic induction of magnetic cores was 1.5 T, and the maximum permeability was 1470. Coercive force was 38 A/m. X-ray analysis showed that the crystallization temperature of Fe₇₆Si₉B₁₀P₅ alloy decreased with the increase of the pulse current and sintering pressure. High resolution electron microscopic analysis results showed that the smaller nanograin size were obtained after spark-plasma sintering with the crystallization temperature decrease. In addition, the crystallization behaviour of the Fe₇₆Si₉B₁₀P₅ during sintering process was analyzed, and the influence of direct crystallization during spark-plasma sintering on the soft magnetic properties was discussed.

• Periodical: Materials Science Forum (Volumes 745-746)
• Pages: 740-745
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.745-746.740
• Online since: February 2013
• Authors: Ming Gang Wang, Tong Liu, Zhan Kui Zhao
• Keywords: Crystallization Temperature, Direct-Nanocrystallizing Method, Nanocrystalline, Spark Plasma Sintering (SPS)

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