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Preparation method of quasicrystal block

A technology of quasicrystals and blocks, which is applied in the field of preparation of block quasicrystals, can solve problems such as solidified microstructure, insufficient cooling rate, casting defects, etc., and achieve unlimited block size, convenient operation, and high quality. good performance effect

Inactive Publication Date: 2012-05-09
TIANJIN ENG MACHINERY INST
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0003] Existing technologies for preparing quasicrystal materials mainly include rapid liquid cooling, large undercooling of pure melt, physical and chemical vapor deposition, irradiation, chemical, mechanical, reaction and high pressure methods, and methods for preparing bulk quasicrystals include casting method , but the traditional casting method has technical defects such as limited performance due to insufficient cooling rate, coarse solidified microstructure, and casting defects.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A preparation method of quasi-crystal block: the powder adopts Al 65 Cu 20 Fe 15 The mixed powder or synthetic powder is placed in the powder feeder. Using 2.5kW YAG laser and coaxial powder feeding system, the laser power is 2kW, the scanning speed is 5mm / s, the powder feeding amount is 5g / min, the beam diameter is 3mm, and the shielding gas flow rate is 2.5l / min. A cubic amorphous crystal with a size of 10 mm × 10 mm × 30 mm was obtained by overlapping multiple layers. The overlap rate is 30%.

Embodiment 2

[0019] A method for preparing a quasicrystalline composite material block: due to the high room temperature brittleness of the bulk quasicrystal, alloying elements Sn or Si are added to the powder, wherein Sn is added to increase ductility, and Si is added to improve the microstructure, and then Improve performance. Add (Al 65 Cu 20 Fe 15 ) 80 sn 20 or Al 57 Si 10 Cu 18 Fe 15 The mixed powder or synthetic powder, using 2.5kW YAG laser and lateral powder feeding system, the laser power is 2Kw, the scanning speed is 5mm / s, the powder feeding amount is 5g / min, the beam diameter is 3mm, and the protective gas flow rate is 2.5l / min. The cubic quasi-crystalline composite material with the size of 10mm×10mm×30 mm was obtained by multi-layer overlapping. The overlap rate is 30%.

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Abstract

The invention which relates to a preparation method of a quasicrystal block belongs to the technical field of metal materials. The preparation method of the quasicrystal block is characterized in that: mixed quasicrystal powder or synthetic quasicrystal powder placed in a powder feeder is delivered to a laser melting pool by a powder delivery gas in a rapid laser shaping device, a quasicrystal or quasicrystal composite material coating is obtained after melting and cooling the mixed quasicrystal powder or the synthetic quasicrystal powder, a laser head is risen by the height of a coating, and the quasicrystal or quasicrystal composite material block is prepared through repeatedly coating. The preparation method of the invention, which has the advantages of simple technology, simple operation, feasibility, good mechanical performance, no restriction of the dimension of the block, excellent quality performance, wide application and the like, can satisfy the large scale application of materials like the quasicrystal block as a structural and functional device.

Description

technical field [0001] The invention belongs to the technical field of metal materials, in particular to a method for preparing bulk quasicrystals. Background technique [0002] At present, laser rapid prototyping is a new technology for preparing and repairing metal parts. This technology has a good application prospect in aerospace and mold fields. Due to the characteristics of rapid heating and rapid cooling in the laser processing process, this technology is also an important research method and research content in the field of rapid solidification. Therefore, laser rapid prototyping is in rapid solidification. It has an important position and role in the field of new materials and equipment manufacturing. [0003] Existing technologies for preparing quasicrystal materials mainly include rapid liquid cooling, large undercooling of pure melt, physical and chemical vapor deposition, irradiation, chemical, mechanical, reaction and high pressure methods, and methods for pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
Inventor 冯丽萍张国胜陈宝庆刘艳芳张金兴
Owner TIANJIN ENG MACHINERY INST
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