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Al-Co-W alloy with alternating lamellar microstructure characteristics and preparation method thereof

A technology of alloy and lamination, applied in the field of preparation of new materials, can solve problems such as staying in the phenomenon of alternating lamellar structure

Active Publication Date: 2015-04-01
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since the discovery of the alternating lamellar structure, scholars have discovered this phenomenon in many systems. The research group of Chen Yongchong and Su Xuping have conducted research on this phenomenon, but they still remain in the understanding of the phenomenon of the alternating lamellar structure

Method used

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  • Al-Co-W alloy with alternating lamellar microstructure characteristics and preparation method thereof
  • Al-Co-W alloy with alternating lamellar microstructure characteristics and preparation method thereof
  • Al-Co-W alloy with alternating lamellar microstructure characteristics and preparation method thereof

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Embodiment 1

[0033] Preparation of (Al-Co-W) alloys with alternating lamellar structure characteristics, the raw materials used are cobalt particles, tungsten powder and aluminum blocks:

[0034] Cobalt particles and tungsten powder are weighed in a molar ratio of 3:1 and mixed, and prepared by smelting in a vacuum electric arc furnace without consumable 3 W alloy, annealed at 900°C for 10 days; and Co 3 After the W alloy is descaled, put it in a corundum mortar and grind it into small particles with a diameter of 3-5μm;

[0035] 30g of the above Co 3 The W particles are spread on the bottom of the corundum crucible, and the particles are in contact with each other without overlapping; a 20g aluminum block is placed at the bottom of the quartz tube and some broken glass pieces are placed, and the Co 3 The crucible of W particles is placed on the cullet, and the quartz tube is vacuum-sealed under the protection of argon;

[0036] The above seal was fitted with aluminum block and Co 3 Th...

Embodiment 2

[0039] Preparation of (Al-Co-W) alloys with alternating lamellar structure characteristics, the raw materials used are cobalt particles, tungsten powder and aluminum powder:

[0040] Cobalt particles and tungsten powder are weighed in a molar ratio of 3:1 and mixed, and prepared by smelting in a vacuum electric arc furnace without consumable 3 W alloy, annealed at 900°C for 10 days; and Co 3 After the W alloy is descaled, put it in a corundum mortar and grind it into small particles with a diameter of 3-5μm;

[0041] 30g of the above Co 3 The W particles are spread on the bottom of the corundum crucible, and the particles are in contact with each other without overlapping; a 10g aluminum block is placed at the bottom of the quartz tube and some broken glass pieces are placed, and the Co 3 The crucible of W particles is placed on the cullet, and the quartz tube is vacuum-sealed under the protection of argon;

[0042] The above seal was fitted with aluminum block and Co 3 Th...

Embodiment 3

[0044] Preparation of (Al-Co-W) alloys with alternating lamellar structure characteristics, the raw materials used are cobalt particles, tungsten powder and aluminum powder:

[0045] Cobalt particles and tungsten powder are weighed in a molar ratio of 3:1 and mixed, and prepared by smelting in a vacuum electric arc furnace without consumable 3 W alloy, annealed at 900°C for 10 days; and Co 3 After the W alloy is descaled, put it in a corundum mortar and grind it into small particles with a diameter of 3-5μm;

[0046] 30g of the above Co 3 The W particles are spread on the bottom of the corundum crucible, and the particles are in contact with each other without overlapping; a 21.5g aluminum block is placed at the bottom of the quartz tube and some broken glass pieces are placed, and the Co 3 The crucible of W particles is placed on the cullet, and the quartz tube is vacuum-sealed under the protection of argon;

[0047] The above seal was fitted with aluminum block and Co 3 ...

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Abstract

The invention discloses an Al-Co-W alloy with alternating lamellar microstructure characteristics and a preparation method thereof, relates to preparation of novel materials and in particular relates to an alloy with alternating lamellar microstructure characteristics and a preparation method thereof. The structure of the alloy comprises an alternating lamellar structure, and the lamellar pairs occur periodically. In the Al-Co-W alloy system, Al component can diffuse quickly, Co component can diffuse slowly and W component is immovable basically. The preparation method comprises the following steps: preparing a CoxWy type intermetallic compound or a (Co-W) solid solution by using components Co and W of which the diffusion rates are different, and grinding the intermetallic compound or solid solution into small particles; controlling the heating temperature and reaction mode in a protective atmosphere so that the component Al in solid state, liquid state or gas state reacts with the CoxWy type intermetallic compound or the (Co-W) solid solution; reacting for a proper period of time, rapidly cooling to room temperature, thereby obtaining the alloy with alternating lamellar microstructure characteristics. According to the invention, a novel path is provided for preparation of novel composite materials and connection of out-phase materials.

Description

technical field [0001] The invention relates to the preparation of new materials, in particular to an alloy with the characteristics of alternating lamellar structure and a preparation method thereof. Background technique [0002] In solid-state reactions, there are three common microstructure features: simple lamellar structure, lamellar structure containing precipitates, and interwoven structure, such as attached figure 1 . Alternating microstructure belongs to the fourth microstructure morphology, which was first introduced in Zn / Fe in the 1980s. 3 Diffusion couples are found in Si, FeSi single-phase layers and FeZn 10 Single-phase layers are arranged alternately in the diffusion reaction zone. The characteristics of the alternating laminar structure are: the structure is composed of lamellar pairs; the lamellar pairs appear periodically; each lamellar in the lamellar pair can be composed of a single phase or two phases. [0003] Since the discovery of the alternating...

Claims

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Application Information

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IPC IPC(8): C22C21/00B32B15/01C22F1/04
Inventor 刘亚董振苏旭平王建华涂浩吴长军彭浩平
Owner CHANGZHOU UNIV