Composites of AISI 316L stainless steel and nanocrystalline Ti-B-C ceramic powders

Slawomir M. Kaczmarek1*, Tomasz Bodziony1, Vinh H. Tran2, Pawal Figiel3, Anna Biedunkiewicz3, Grzegorz Leniec1

1Institute of Physics, West Pomeranian University of Technology, Al. Piastów 17, 70-310 Szczecin, Poland

2Institute of Low Temperatures and Structural Research, 2 Okólna str., 50-422 Wroclaw, Poland

3Institute of Materials Science and Engineering, West Pomeranian University of Technology, Al. Piastów 17,70-310 Szczecin, Poland 

Adv. Mater. Lett., 2018, 9 (10), pp 696-702

DOI: 10.5185/amlett.2018.2161

Publication Date (Web): Jul 18, 2018

E-mail: skaczmarek@zut.edu.pl

Abstract


Series of nanocrystalline and TiC, TiB2, and B4C powders as dopants (3%-20%) embedded in an AISI 316L austenitic steel have been prepared and investigated by ferromagnetic resonance and magnetic measurements. The homogeneous composites with the dopants up to x = 7 vol. % exhibit superparamagnetic properties, characterized by bifurcation between the field-cooled MFC(T) and zero-field cooled MZFC(T) magnetization below Tir and a maximum at Tmax in low-field MZFC(T) curves. We found that the Tir and Tmax values depend proportionally on the dopant concentrations x. The magnetization measurements in fields above 1000 Oe suggested an induced phase transition from superparamagnetic state to ferromagnetic one but presumably without long-range magnetic correlation. An analysis of magnetic anisotropic energy barrier distributions implied that different sizes and compositional types of dopants may contribute to the superparamagnetic relaxation process.  The results demonstrate the possibility of obtaining new steel-based materials with desired properties and potential applications as combining magnetic and mechanical advantages.

Keywords

Nanocrystalline, Ti-B-C, FMR, magnetic susceptibility.

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