Iron-based amorphous alloy material with high glass-forming capability

A technology for iron-based amorphous and alloy materials, applied in the fields of material science and condensed matter physics, can solve the problems of inability to meet the cooling conditions of amorphous alloys, limited amorphous forming ability, etc., and achieve good amorphous forming ability and glass forming ability. , the effect of low production cost and simple preparation process

Inactive Publication Date: 2012-11-14
NANCHANG HANGKONG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the size of the sample increases to a certain size, the copper mold cannot meet the cooling conditions required for the formation of bulk amorphous alloys
However, due to the limited amorphous formation ability of most alloys, and the required cooling rate is higher than 10 6 K / s, so many amorphous alloys prepared are basically thin strips, filaments, etc.

Method used

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  • Iron-based amorphous alloy material with high glass-forming capability
  • Iron-based amorphous alloy material with high glass-forming capability
  • Iron-based amorphous alloy material with high glass-forming capability

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Experimental program
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Embodiment 1

[0011] Embodiment 1. The iron-based amorphous alloy of this embodiment is composed of Fe, Co, Cr, Mo, C, B, and Y, and Fe, Co, Cr, Mo, C, B, and Y is arc-melted in the argon gas adsorbed by titanium according to the required atomic ratio to make it evenly mixed, sucked and cooled to obtain a plate-shaped amorphous alloy Fe with a thickness of 2 mm and a width of 13 mm. 24 co 24 Cr 15 Mo 14 C 15 B 6 Y 2 . The X-ray diffraction pattern confirmed a completely amorphous state. The glass transition temperature (T g =842K) initial crystallization temperature T x =904K and melting point T m =1371K. The supercooled liquid region is ΔT x =62K, indicating that its ability to form amorphous is very good. The Vicker hardness reaches 1298Hv, and the compressive fracture strength of this alloy is 3200Mpa.

Embodiment 2

[0012] Embodiment two, the technical scheme is consistent with embodiment one, and the composition of the iron-based bulk amorphous alloy prepared is Fe 28 co 20 Cr 15 Mo 14 C 15 B 6 Y 2 Fe in this embodiment 28 co 20 Cr 15 Mo 14 C 15 B 6 Y 2 Amorphous alloys have a high glass-forming ability, and this alloy is characterized by a glass transition temperature of T g =860K, the crystallization temperature is T x =900K, its melting point is T m =1366K, the supercooled liquid phase region is 40K, and its amorphous formation ability is better than that of the bulk amorphous alloy prepared in implementation 1. The Vicker hardness reaches 1280Hv, and the compressive fracture strength of this alloy is 2800MPa.

Embodiment 3

[0013] Embodiment three, technical scheme as embodiment one, the bulk amorphous component that prepares is Fe 32 co 16 Cr 15 Mo 14 C 15 B 6 Y 2 , the alloy replaces part of the Co of the implementation 1 scheme with Fe to obtain Fe 32 co 16 Cr 15 Mo 14 C 15 B 6 Y 2 Amorphous alloys have high glass-forming ability, the alloy reduces cost by replacing the more expensive metal Co with cheaper iron, and the alloy has good thermal stability. The glass transition temperature T of the alloy g 854K, crystallization temperature Tx The temperature is 893K, the melting point Tm is 1358K, the supercooled liquid zone width of the alloy is 39K, the Vickers hardness is 1269Hv, and the compressive fracture strength is 2750Mpa.

[0014] During implementation, the prepared material is represented by the following formula: Fe 24+x co 24-x Cr 15 Mo 14 C 15 B 6 Y 2 (0≤x≤10), its thermodynamic parameter data is recorded in Table 1; the cooling rate of the present invention is r...

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Abstract

An iron-based amorphous alloy material with high glass-forming capability consists of the elements of Fe, Cr, Mo, C, B, Y and Co, wherein the atomic number ratio of the Fe, Cr, Mo, C, B, Y and Co are (24-32%):(16-24%):15%:14%:15%:6%:2%; the atomic number ratio of the elements of Fe, Cr, Mo, C, B, Y and Co are 24%:24%:15%:14%:15%:6%:2%; the atomic number ratio of the elements of Fe, Cr, Mo, C, B, Y and Co are 28%:20%:15%;14%:15%:6%:2%; and the atomic number ratio of the elements of Fe, Cr, Mo, C, B, Y and Co are 32%:16%:15%:14%:15%;6%:2%. The iron-based amorphous alloy material not only has a simple preparation technology, is low in cost, but also has good amorphous-forming capability and glass-forming capability, and also has mechanical properties with high strength and high hardness.

Description

technical field [0001] The invention relates to the fields of material science and condensed matter physics, in particular to an iron-based amorphous alloy material with high glass-forming ability. Background technique [0002] Metallic glasses are usually formed by rapidly cooling molten metal alloys to the glass transition temperature and solidifying before the alloys nucleate, while metals generally form crystals by nucleation and crystallization when cooled from a liquid state. In order to obtain a very high cooling rate for better formation of amorphous alloys, it is only necessary to spray the molten metal onto a substrate with very good thermal conductivity. However, it has been found that some alloys, when cooled fast enough, will remain viscous when they solidify, thereby inhibiting crystallization. On good substrates, previously obtained alloys are strips, powders, etc. If crystallization can be suppressed at very low cooling rates, larger amorphous alloys can be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/02
Inventor 陈庆军刘江烈周贤良沈军华小珍
Owner NANCHANG HANGKONG UNIVERSITY
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