Co-Based Bulk Metallic Glasses with Good Soft-Magnetic Properties and High Strength

2017 ◽  
Vol 898 ◽  
pp. 703-708 ◽  
Author(s):  
Qi Kui Man ◽  
Ya Qiang Dong ◽  
Chun Tao Chang ◽  
Xin Min Wang ◽  
Run Wei Li
Keyword(s):  
Magnetic Properties ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Eutectic Point ◽  
Glass Forming Ability ◽  
Soft Magnetic Properties ◽  
Soft Magnetic ◽  
Glass Forming

The thermal stability, glass-forming ability, soft-magnetic properties and mechanical properties of Co46Fe19+xB22.5Si5.5Nb7–x (x=0–2) bulk metallic glasses were investigated. The 5.5 at% Nb addition was found to be effective in approaching alloy to a eutectic point, resulting in an increase in glass-forming ability. By copper mold casting, bulk metallic glass rods with diameters up to 5 mm were produced. Except for high glass-forming ability, the bulk metallic glasses also exhibit good soft-magnetic properties, i.e., low coercive force of 1.34–2.14 A/m, high effective permeability at 1 kHz of 2.26–3.06×104, and high fractures strength (σf) of 4010–4460 MPa. This Co-based bulk metallic glass system with high strengths and excellent soft-magnetic properties is promising for future applications as a new functional material.

Effect of B2O3 Fluxing on Glass-Forming Ability and Soft Magnetic Properties of Fe(-Co)-B-Si-Nb Bulk Metallic Glasses

2014 ◽  
Vol 783-786 ◽  
pp. 1895-1900 ◽  
Author(s):  
Teruo Bitoh
Keyword(s):  
Magnetic Properties ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Glass Forming Ability ◽  
The Other ◽  
Maximum Diameter ◽  
Soft Magnetic Properties ◽  
Copper Mold ◽  
Soft Magnetic ◽  
Glass Forming

The effect of B2O3 fluxing on the glass-forming ability (GFA), the structure and the soft magnetic properties of Fe (-Co)-B-Si-Nb bulk metallic glasses (BMGs) has been investigated. The large Fe-Co-B-Si-Nb BMG specimens with diameters up to 7.7 mm, which is approximately 1.5 times as large as that of the maximum diameter of the copper mold cast one (= 5 mm), were prepared by the fluxing and water quenching. Thus the GFA of the Fe-Co-B-Si-Nb BMG are improved by the fluxing. It was confirmed that the soft magnetic properties of the Fe-Co-B-Si-Nb BMG are also improved by the fluxing. On the other hand, it was found for the Co-free Fe-B-Si-Nb BMG that the B2O3 fluxing promotes the precipitation of the α-Fe (-Si) and Fe2B phases in the central region of the specimens; i.e., the GFA of the Fe-B-Si-Nb BMG is decreased by the fluxing. The Fe-B-Si-Nb BMG specimens show a flat hysteresis loop, indicating a good linear relationship between the magnetic induction and the applied magnetic field. These results of the Fe-B-Si-Nb BMG show that it is possible to develop a new soft magnetic material that exhibits constant permeability, which is necessary for producing inductors and choke coils.

Mechanical Behavior of Fe60Co14Ga2P10B5Si3Al3C3 Bulk Metallic Glass

2014 ◽  
Vol 216 ◽  
pp. 45-48
Author(s):  
Dragoş Buzdugan ◽  
Cosmin Codrean ◽  
Viorel Aurel Şerban ◽  
Mircea Vodǎ
Keyword(s):  
Magnetic Properties ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Pressure Sensors ◽  
Pressure Vessels ◽  
Soft Magnetic Properties ◽  
Soft Magnetic ◽  
Science Field

Development of Fe-based bulk metallic glasses (BMG) with good mechanical and soft magnetic properties has become a major objective in the materials science field. Bulk metallic glasses present an interesting combination of properties. They exhibit very high strength (both in tension and compression), large elastic elongation limit, high hardness, excellent corrosion resistance, and good soft magnetic properties. These properties makes them suitable for many applications like high resistant control cables, pressure vessels, micro-components, pressure sensors, microgears for motors, magnetic cores for power supplies and hard fibers in composite materials. Multi-component Fe60Co14Ga2P10B5Si3Al3C3bulk metallic glass was synthesized in rod form with a diameter of 1 mm by copper mould casting technique using raw industrial materials. The obtained alloy was analyzed by X-ray diffraction (XRD), differential thermal analysis (DTA) and scanning electron microscopy (SEM) techniques, in order to determine the phase constituent, the thermal stability and the fracture surfaces of as-cast samples. The mechanical behaviour was investigated by microhardness and compression tests. The values recorded for hardness and fracture strength includes this alloy in the category of high resistant materials.

Co- and Fe-based multicomponent bulk metallic glasses designed by cluster line and minor alloying

2008 ◽  
Vol 23 (6) ◽  
pp. 1543-1550 ◽  
Author(s):  
Q. Wang ◽  
C.L. Zhu ◽  
Y.H. Li ◽  
X. Cheng ◽  
W.R. Chen ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Metallic Glass ◽  
Metallic Glasses ◽  
Ternary Alloys ◽  
Soft Magnetic Properties ◽  
Soft Magnetic ◽  
Glass Forming ◽  
Compact Binary ◽  
Binary Clusters ◽  
Composition Formula

Bulk metallic glass (BMG) formations in Co- and Fe-based alloy systems are investigated by using our cluster line approach in combination with minor alloying principle. Basic ternary alloy compositions in Co–B–Si, Fe–B–Y, and Fe–B–Si systems are first determined by cluster lines defined by linking special binary clusters to third elements. Then the basic ternary alloys are further minor alloyed with 3 to 5 at.% Nb to improve glass-forming abilities (GFAs) and ϕ3 mm BMGs are formed in (Co8B3–Si)–Nb and (Fe8B3–Y)–Nb but not in (Fe8B3–Si)–Nb, TM8B3 (TM = Fe, Co) being the most compact binary cluster. The BMGs are expressed approximately with a unified simple composition formula: (TM8B3)1M1, M = (Si, Nb) or (Y, Nb). Finally, mutual Fe and Co substitutions further improve the GFAs as well as the soft magnetic properties, e.g., Is reaching 0.98 T and Hc < 6 A/m for the Co–Fe–B–Si–Nb BMGs. Using the (cluster)1(glue atom)1 model, a new ternary BMG Fe8B3Nb1 is obtained.

scholarly journals Effect of Ni addition on the glass-forming ability and soft-magnetic properties of FeNiBPNb metallic glasses

2011 ◽  
Vol 56 (36) ◽  
pp. 3932-3936 ◽  
Author(s):  
AnDing Wang ◽  
MingXiao Zhang ◽  
JianHua Zhang ◽  
He Men ◽  
BaoLong Shen ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Metallic Glasses ◽  
Glass Forming Ability ◽  
Soft Magnetic Properties ◽  
Soft Magnetic ◽  
Glass Forming ◽  
Ni Addition
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