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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Synthesis, thermal stability and properties of [(Fe_(1-x)Co_x)_(72)Mo_4B_(24)]_(94)Dy_6 bulk metallic glasses
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Synthesis, thermal stability and properties of [(Fe_(1-x)Co_x)_(72)Mo_4B_(24)]_(94)Dy_6 bulk metallic glasses

机译：[（Fe_（1-x）Co_x）_（72）Mo_4B_（24）] _（94）Dy_6大块金属玻璃的合成，热稳定性和性能

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摘要

A series of [(Fe_(1-x)Co_x)_(72)Mo_4B_(24)]_(94)Dy_6 {x = 0.1,0.2,0.3,0.4 and 0.5 at.%) bulk metallic glasses (BMGs) in rod geometries with critical diameter up to 3 mm were fabricated by copper mold casting method. This alloy system exhibited good thermal stability with high glass transition temperature (T_g) 860 K and crystallization temperature (T_x) 945 K. The addition of Co was found to be effective in adjusting the alloy composition deeper to eutectic, leading to lower liquidus temperature (T_1). The [(Fe_(0.8)Co_(0.2))_(72)Mo_4B_(24)]_(94)Dy_6 alloy showed the largest supercooled liquid region (ΔT_X = T_x - T_g = 92 K), reduced glass transition temperature (T_(rg) = T_g/T_1 = 0.622) and gamma parameter (γ = T_x/(T_g + T_1) = 0.424) among the present system. Maximum compressive fracture strength of 3540 MPa and micro-Vickers hardness of 1185 kg/mm~2 was achieved, resulting from the strong bonding structure among the alloy constituents. The alloy system possessed soft magnetic properties with high saturation magnetization of 56.61-61.78Am~2/kg and coercivity in the range of 222-264.2 A/m, which might be suitable for application in power electronics devices.
机译：一系列[[Fe_（1-x）Co_x）_（72）Mo_4B_（24）] _（94）Dy_6 {x = 0.1,0.2,0.3,0.4和0.5 at。％）块状金属玻璃（BMG）通过铜铸模法制造了具有高达3 mm的临界直径的棒形。该合金体系在高玻璃化转变温度（T_g）860 K和结晶温度（T_x）945 K的情况下表现出良好的热稳定性。发现添加Co可以有效地将合金组成更深地调整为低共熔温度，从而降低液相线温度（ T_1）。 [[Fe_（0.8）Co_（0.2））_（72）Mo_4B_（24）] _（94）Dy_6合金显示出最大的过冷液体区域（ΔT_X= T_x-T_g = 92 K），降低了玻璃化转变温度（T_ （rg）= T_g / T_1 = 0.622）和本系统中的伽玛参数（γ= T_x /（T_g + T_1）= 0.424）。由于合金成分之间的牢固结合结构，因此获得了3540 MPa的最大抗压断裂强度和1185 kg / mm〜2的微维氏硬度。该合金系统具有软磁性能，其饱和磁化强度为56.61-61.78Am〜2 / kg，矫顽力在222-264.2 A / m范围内，可能适用于电力电子设备。

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