scholarly journals Effect of Cr Addition on Magnetic Properties and Corrosion Resistance of Optimized Co and Fe-Based Amorphous Alloys

Metals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 304
Author(s):  
Jonghee Han ◽  
Jihyun Hong ◽  
Seoyeon Kwon ◽  
Haein Choi-Yim
Keyword(s):  
Magnetic Properties ◽  
Corrosion Resistance ◽  
Amorphous Alloys ◽  
Melt Spinning ◽  
Alloy System ◽  
Thermomechanical Analysis ◽  
Soft Magnetic Properties ◽  
Soft Magnetic ◽  
Scanning Calorimetry ◽  
Corrosion Properties

In the Fe-Co alloy system, the addition of Cr improves the glass-forming ability (GFA) with superior soft magnetic properties such as high saturation magnetization (Ms) and low coercivity (Hc). In addition, Cr is considered to be an important factor for improving the corrosion resistance of Fe-based amorphous alloy. Therefore, in the present study, we investigated the GFA, soft magnetic properties, and corrosion resistance of the as-spun ribbons in [Co0.075Fe0.675B0.2Si0.05]100−xCrx (x = 0–8) alloy system. The ribbons were produced using the melt-spinning technique and were characterized by X-ray diffraction, differential scanning calorimetry, thermomechanical analysis, and vibrating sample magnetometer. The Co-Fe-B-Si-Cr alloys exhibited high thermal stability and a high Ms of 0.93–1.53 T. Corrosion properties were evaluated by cyclic voltammetry. The addition of Cr improved the corrosion resistance of the alloys. The alloys with a higher Cr content exhibited a higher corrosion resistance. The optimum combination with soft magnetic properties and corrosion resistance of Fe-co based amorphous alloys can be utilized for extensive fields of application through a variation of Cr contents.

scholarly journals Optimization of Soft Magnetic Properties in Fe-B and Fe-B-Si Amorphous Alloys Obtained by Melt Spinning Method

2002 ◽  
Vol 102 (2) ◽  
pp. 309-316 ◽  
Author(s):  
P. Kwapuliński ◽  
Z. Stokłosa ◽  
A. Chrobak ◽  
J. Rasek ◽  
G. Haneczok
Keyword(s):  
Magnetic Properties ◽  
Amorphous Alloys ◽  
Melt Spinning ◽  
Soft Magnetic Properties ◽  
Soft Magnetic

Structural Studies of the Relaxed Amorphous Phase in the Fe81B14Nb5 Alloy

2013 ◽  
Vol 203-204 ◽  
pp. 380-385 ◽  
Author(s):  
Małgorzata Karolus
Keyword(s):  
Magnetic Properties ◽  
Amorphous Phase ◽  
Magnetic Permeability ◽  
Amorphous Alloys ◽  
Melt Spinning ◽  
Soft Magnetic Materials ◽  
Soft Magnetic Properties ◽  
Structural Studies ◽  
Soft Magnetic ◽  
Melt Spinning Technique

Amorphous alloys based on iron, obtained by melt spinning technique, are modern and very promising soft magnetic materials. The thermal annealing at temperatures closed to the crystallization temperature can cause an increase of magnetic permeability more than 10 times i.e. the so called enhancement of soft magnetic properties effect (ESMP). It is usually explained by formation of iron nanocrystallites in amorphous surroundings or by formation of the relaxed amorphous phase. Such a microstructure leads to averaging out of magnetic anisotropy and cause the ESMP.

Effect of C addition on the corrosion properties of amorphous Fe-based amorphous alloys

2019 ◽  
Vol 33 (01n03) ◽  
pp. 1940006
Author(s):  
Xiang Li ◽  
Xu Zhao ◽  
Fang Liu ◽  
Lu Yu ◽  
Yuxin Wang
Keyword(s):  
Corrosion Resistance ◽  
Amorphous Alloys ◽  
Melt Spinning ◽  
Electrochemical Impedance ◽  
Target Material ◽  
Soft Magnetic ◽  
Corrosion Properties ◽  
Amorphous Ribbons ◽  
Soft Magnetic Alloys ◽  
Arc Melting

Fe-based amorphous alloys are important materials with a high potential for commercialization by evaluating their corrosion performances. In this work, amorphous Fe[Formula: see text]Cu1Nb3Si[Formula: see text]B9 alloy was chosen as a target material to investigate the effects of the addition of C on the corrosion properties by an electrochemical method. Alloy ingots Fe[Formula: see text]Cu1Nb3Si[Formula: see text]C[Formula: see text]B[Formula: see text] (x = 0, 1, 2, 3 at.%) were prepared using an arc melting system, under argon atmosphere. Planar flow melt spinning of the alloys was carried out to obtain amorphous ribbons of the width [Formula: see text][Formula: see text]5 mm and the thickness about 30 [Formula: see text]m. Effects of the addition of C into Fe[Formula: see text]Cu1Nb3Si[Formula: see text]B9 amorphous soft magnetic alloys were investigated in acidic solutions. Studies of potentiodynamic polarization and electrochemical impedance revealed the passivation ability and corrosion resistance of the amorphous ribbons with C in the 0.1M H2SO4 media at room-temperature. The amorphous ribbons showed excellent corrosion resistance with formation of a stable passive film. It can be obviously observed that the addition of C significantly improves the corrosion resistance.

Microstructure and Soft Magnetic Properties of Fe61Co10Y8Me1B20 (Where Me = W, Zr or Nb) Amorphous Alloys

2012 ◽  
Vol 57 (1) ◽  
pp. 265-270 ◽  
Author(s):  
P. Pietrusiewicz ◽  
M. Nabiałek ◽  
M. Szota ◽  
K. Perduta
Keyword(s):  
Magnetic Properties ◽  
Amorphous Alloys ◽  
Melt Spinning ◽  
Magnetic Measurements ◽  
Soft Magnetic Properties ◽  
Soft Magnetic ◽  
Entire Volume ◽  
Magnetic Cores ◽  
Amorphous Nature ◽  
Core Losses

Microstructure and Soft Magnetic Properties of Fe61Co10Y8Me1B20(Where Me = W, Zr or Nb) Amorphous AlloysThe microstructure and the soft magnetic properties of the multi-component Fe61Co10Y8Me1B20amorphous alloys (where Me = W, Zr or Nb) have been investigated; the samples were in the form of ribbons of 3 mm width and 30 μm thickness. The samples were produced using a single-roller melt-spinning method. The alloy composition was investigated using an X-ray diffractometer. The amorphous nature of the entire volume of all the as-quenched samples was confirmed. From the magnetic measurements performed using the ‘LakeShore’ vibrating sample magnetometer, magnetic parameters such as: coercivity, saturation of the magnetization for the as-quenched samples were derived. All of the investigated alloys displayed good soft magnetic properties, making them perfect materials for magnetic cores. The core losses for different values of magnetic field and operating frequency were also measured. It was shown that the investigated alloys featured lower core losses than commercially-used classical FeSi steel.

Glass formation, magnetic properties, and electrical resistivity of the multi-component FeNbBCuNiCo amorphous alloys

2021 ◽  
Vol 112 (2) ◽  
pp. 137-142
Author(s):  
Man Zhu ◽  
Chi Zhang ◽  
Tao Xu ◽  
Lijuan Yao ◽  
Yongqin Liu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Magnetic Properties ◽  
Electrical Resistivity ◽  
Amorphous Alloys ◽  
Low Cost ◽  
Industrial Applications ◽  
High Thermal Stability ◽  
Soft Magnetic Properties ◽  
Soft Magnetic ◽  
Scanning Calorimetry

Abstract The effects of additions of Co and Ni to the FeNbBCu alloys on the glass forming ability (GFA), soft magnetic properties and electrical resistivity of Fe-based amorphous alloys were studied by means of X-ray diffraction, differential scanning calorimetry, vibrating sample magnetometry and four-probe testing. The Fe80–x–y Nb5B14Cu1Co x Ni y alloys exhibit high thermal stability and excellent GFA with T x1 ≥ 735 K and T x1/T m ≥ 0.539. They also show excellent soft magnetic properties with high saturation magnetization of 93– 101 emu g–1 and low coercivity of 0.04 –2.37 Oe. The electrical resistivity of these alloys ranges from 121 μΩ cm to 163 μΩ cm. The newly developed FeNbBCu-CoNi glassy alloys not only possess good GFA and high thermal stability, but also have excellent magnetic properties, high electrical resistivity and low cost. With such promising properties, these alloys have potential for industrial applications.

The Effect of Co Addition on Glassy Forming Ability and Soft Magnetic Properties of Fe-Si-B-P Bulk Metallic Glass

2012 ◽  
Vol 508 ◽  
pp. 112-116 ◽  
Author(s):  
Xue Li ◽  
Yan Zhang ◽  
Hidemi Kato ◽  
Akihiro Makino ◽  
Akihisa Inoue
Keyword(s):  
Magnetic Properties ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Glassy Alloy ◽  
High Strength ◽  
Alloy System ◽  
Soft Magnetic Properties ◽  
Soft Magnetic ◽  
Co Addition ◽  
Ferromagnetic Bulk

We Successfully Prepared the Rod Glassy Samples of (Fe1-xCox)76Si9B10P5 (x = 0~0.4) Bulk Metallic Glass (BMG) with the Diameters up to 3.0 mm by Substituting Fe for a Small Amount of Co Element. A Certain Amount of Co Substitution for Fe Contributes to the Increase of the Glass-Forming Ability (GFA) while Maintaining Good Mechanical Properties (the Fracture Strength up to 3700 MPa). This Co-Added Ferromagnetic Bulk Glassy Alloy System Also Exhibits a Higher Saturation Magnetization of 1.49 T and Lower Coercive Force (Hc, 1.2 A/m). The Fe-Based BMGs with Alloying a Small Amount of Co Element Demonstrate Excellent Combination of High GFA, Good Soft-Magnetic Properties as Well as High Strength.

Effects of nanocrystallization upon the soft magnetic properties of Co‐based amorphous alloys

1994 ◽  
Vol 75 (10) ◽  
pp. 6940-6942 ◽  
Author(s):  
P. Quintana ◽  
E. Amano ◽  
R. Valenzuela ◽  
J. T. S. Irvine
Keyword(s):  
Magnetic Properties ◽  
Amorphous Alloys ◽  
Soft Magnetic Properties ◽  
Soft Magnetic
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