Study of crystallization behavior and kinetics of magnetic FeCoCrNiZr high entropy amorphous alloy

Nonisothermal crystallization kinetics of Cr‐rich metallic glass Cr29.4Fe29.4Mo14.7C14.7B9.8Y2 with desirable properties

“…As a promising type of advanced materials, Cr‐bearing metallic glasses (MGs) have gained extensive attentions attributing to the combination of attractive properties, that is, remarkable corrosion resistance, high thermal stability, high strength, high hardness, and wear resistance, which makes them as prospective materials for scientific investigations and engineering applications 1–14 . However, it is unavoidable that MGs will change into the corresponding crystalline counterparts for their metastable nature and this can be enhanced with increasing temperatures, which exhibits noticeable effects on their structures and properties 15–19 . Therefore, it is essential to investigate the crystallization behaviors and crystallization kinetics of MGs at various heating conditions, which is significant for tuning the structures and properties of MGs 15–40 .…”

“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14] However, it is unavoidable that MGs will change into the corresponding crystalline counterparts for their metastable nature and this can be enhanced with increasing temperatures, which exhibits noticeable effects on their structures and properties. [15][16][17][18][19] Therefore, it is essential to investigate the crystallization behaviors and crystallization kinetics of MGs at various heating conditions, which is significant for tuning the structures and properties of MGs. Among them, the nonisothermal crystallization behaviors and crystallization kinetics for MGs with various compositions, that is, multicomponent Zr-Cu-Fe-Al MG, 15 Fe-Co-Cr-Ni-Zr MG, 16 Zr-(CuAg)-Al MG, 17 Fe-Ni-P-B MG, 18 Zr-Co-Al-Cu MG, 24 Fe-Ni-Mo-P-C-B-Cu MG, 25 Ti-Zr-Ni-Cu-Be MG, 26 Co-Fe-Ta-B MG, 29 Ni-Nb-Ti-Zr-Co-Ta MG, 31 Fe-Cr-P-C-B MG, 32 and Fe-Co-Cr-Mo-Y-C-B MG 33 ; ternary U-Co-Al MG, 19 La-Al-Co MG, 27 Zr-Al-Fe MG, 30 Zr-Co-Al MGs, 24,35 Fe-P-C MG, 36 Fe-B-C MG, 37 La-Al-Ni MG, 38 and Pd-Ni-P MG 39 ; and binary Cu-Zr MG, 40 have been extensively researched by Kissinger, Ozawa, Kissinger-Akahira-Sunose (KAS), Ozawa-Flynn-Wall (OFW), and Vogel-Fulcher-Tammann (VFT) approaches using differenti...…”

“…[15][16][17][18][19] Therefore, it is essential to investigate the crystallization behaviors and crystallization kinetics of MGs at various heating conditions, which is significant for tuning the structures and properties of MGs. Among them, the nonisothermal crystallization behaviors and crystallization kinetics for MGs with various compositions, that is, multicomponent Zr-Cu-Fe-Al MG, 15 Fe-Co-Cr-Ni-Zr MG, 16 Zr-(CuAg)-Al MG, 17 Fe-Ni-P-B MG, 18 Zr-Co-Al-Cu MG, 24 Fe-Ni-Mo-P-C-B-Cu MG, 25 Ti-Zr-Ni-Cu-Be MG, 26 Co-Fe-Ta-B MG, 29 Ni-Nb-Ti-Zr-Co-Ta MG, 31 Fe-Cr-P-C-B MG, 32 and Fe-Co-Cr-Mo-Y-C-B MG 33 ; ternary U-Co-Al MG, 19 La-Al-Co MG, 27 Zr-Al-Fe MG, 30 Zr-Co-Al MGs, 24,35 Fe-P-C MG, 36 Fe-B-C MG, 37 La-Al-Ni MG, 38 and Pd-Ni-P MG 39 ; and binary Cu-Zr MG, 40 have been extensively researched by Kissinger, Ozawa, Kissinger-Akahira-Sunose (KAS), Ozawa-Flynn-Wall (OFW), and Vogel-Fulcher-Tammann (VFT) approaches using differential scanning calorimeter (DSC). Under nonisothermal crystallization conditions, MGs were continuously heated up to complete crystallization by different heating rates.…”

“…On the basis of this, the local Avrami exponent, activation energy, and the kinetic fragility parameter under nonisothermal crystallization conditions can be obtained, which is crucial for pointing out the nonisothermal crystallization mechanism and tuning the structures and properties of MGs. [15][16][17]24,26,29 Previously, a novel Cr-rich MG Cr 29.4 Fe 29.4 Mo 14.7 C 14.7 B 9.8 Y 2 (at.%) was developed with desirable advantages, such as good glass-forming ability (GFA) with a critical dimeter of 3 mm, high thermal stability with the glass transition temperature (T g ) of 936 K and the supercooled liquid region (ΔT x ) of 79 K, prominent corrosion resistance of no weight loss after immersion in 1 M HCl solution, high fracture strength up to 3.91 GPa and high Vickers microhardness up to 13.66 GPa. Consequently, it is considered as promising corrosion/wear resistance coating materials to enrich the potential application of MGs.…”

“…Consequently, it is considered as promising corrosion/wear resistance coating materials to enrich the potential application of MGs. 5 Nevertheless, the current researches of the crystallization kinetics for Crbearing MGs are preferred for MGs with low content (< 20 at.%) of Cr, 16,23,[32][33][34]41,42 and the crystallization kinetics of Cr-containing MGs with high content (>20 at.%) of Cr such as the present Cr-rich MG Cr 29.4 Fe 29.4 Mo 14.7 C 14.7 B 9.8 Y 2 has not been referred, which is severely unfavorable for comprehending the formation and tuning the structures and properties of these MGs. Accordingly, it is of vital significance to uncover the crystallization kinetics of Cr-bearing MGs with high content of Cr.…”