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Method for preparing porous bulk amorphous alloy

A technology of amorphous alloy and hole block, which is applied in the field of preparation of porous bulk amorphous alloy, can solve the problems of porous amorphous alloy corrosion, complicated manufacturing process, and affecting the ability of amorphous formation, and achieves low solidification temperature and easy Uniform results in realization, structure and performance

Inactive Publication Date: 2008-03-26
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the complex manufacturing process of the pre-sintered patterns used in this document, and the corrosive effect on the porous amorphous alloy during the dissolution process, the existence of the pre-sintered patterns will affect the amorphous formation ability and the size of the pores. The size and shape are also affected by the size and shape of the particles in the pre-sintered block, so it is necessary to explore new methods for preparing porous bulk amorphous alloys
The present invention adopts the combination of plastic processing and thermosetting technology to prepare porous block amorphous alloy, and there is no report in this respect at present

Method used

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  • Method for preparing porous bulk amorphous alloy

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Embodiment 1

[0016] Mg was prepared by the melt rotation method on a single-roll spin quenching equipment 65 Cu 25 Y 10 Bulk amorphous alloy ribbon, the average thickness of the resulting ribbon is about 30 μm. Heat the strip to 160 °C (Mg 65 Cu 25 Y 10 Glass transition temperature T of amorphous alloy g About 145°C, the crystallization temperature T x about 204°C), after 8 minutes of heat preservation, the strip is rolled into a round tube with a diameter of 1mm by a molding die, and the forming stress is about 5MPa. Together. At room temperature, the circular tubes were stacked closely parallel to the axial direction, and the above-mentioned amorphous alloy circular tubes were preformed with a stress of about 1 MPa, and then solidified into a bulk porous material at 160° C. for 1 hour. After testing, the obtained porous bulk amorphous alloy does not undergo any crystallization, and the porosity of the material is 90%. Prepared Mg 65 Cu 25 Y 10 The X-ray diffraction spectrum o...

Embodiment 2

[0018] Preparation of Mg by melt rotation method 65 Cu 25 Y 10 Bulk amorphous alloy ribbon, the average thickness of the resulting ribbon is about 30 μm. Heat the above-mentioned strips to 180°C, hold the temperature for 3 minutes, roll the strips into a round tube with a diameter of about 500 μm in the forming mold, and the forming stress is about 0.5 MPa, and at the same time, the strips are connected into a circle by plastic deformation at the above temperature The joints of the pipes are connected together. At room temperature, the circular tubes are stacked parallel to the axial direction closely, and the above-mentioned amorphous alloy circular tubes are preformed with a stress of about 1 MPa, and then solidified into a bulk material at 150° C. for 2 hours. After testing, the obtained porous bulk amorphous alloy does not undergo crystallization, and the porosity of the material is about 88%.

Embodiment 3

[0020] Zr with a thickness of 25 μm prepared by the melt rotation method 41.25 Ti 13.75 Ni 10 Cu 12.5 be 22.5 Bulk amorphous alloy ribbon. Zr 41.25 Ti 13.75 Ni 10 Cu 12.5 be 22 Glass transition temperature T of amorphous alloy g About 363°C, the crystallization temperature T x About 437°C. The above strips are heated to 380° C., and after 8 minutes of heat preservation, the strips are pressed into a corrugated plate with an arc diameter of about 1 mm under the stress of about 18 MPa in a molding die. At room temperature, the corrugated plates were stacked parallel and closely along the direction of the large plane, and the above-mentioned amorphous alloy corrugated plates were preformed with a pressure of about 1 MPa, and then solidified into a bulk porous material at 370°C for 2 hours. After testing, the obtained porous bulk amorphous alloy does not undergo crystallization, and the porosity of the material is about 92%.

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Abstract

This invention provides a method for preparing porous and nubby amorphous alloy, which is characterized in that: heating nubby amorphous alloy bar produced with melt rotating method to the point between glass transformation temperature Tg and grain refining temperature Tx of amorphous alloy, and insulating heat for 2-10 minutes; processing the bar into 100 mum-3mm corrugated board or pipe at 0.2-20MPa, then hardening them into nubby material to get porous and nubby amorphous alloy. The method is simple and is easy to be accomplished. The factor of porosity of porous material can be designed, and the texture and performance of the material are homogeneous.

Description

technical field [0001] The invention relates to a method for preparing a porous bulk amorphous alloy, in particular, the invention relates to a method for preparing a porous bulk amorphous alloy by using plastic processing and solidification technology. Background technique [0002] Bulk amorphous alloys have high strength, high hardness, high corrosion resistance, and good electromagnetic and energy storage properties. Therefore, the development and utilization of bulk amorphous alloys have attracted extensive attention from material workers. Because of their unique rheological properties (also considered superplastic behavior by some researchers) when reheated to a supercooled liquid temperature interval (the temperature interval between the glass transition temperature Tg and the crystallization temperature Tx), they are Machining of micro / nano-sized parts offers new avenues. Due to the strong adaptability and wide application range of metal and its alloy materials, mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/00C22C45/00
Inventor 陈刚
Owner JIANGSU UNIV
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