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Method and device for preparing large-size bulk amorphous composite materials

An amorphous composite material, large-scale technology, applied in the field of fiber/amorphous composite materials, can solve the problems of size, interface reaction limitation, etc., to achieve the effect of reducing interface reaction, short contact time, and controlling mechanical properties

Inactive Publication Date: 2010-05-12
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a method and equipment for preparing large-scale bulk fiber / amorphous alloy composite materials, which can solve the limitation problems of size and interface reaction in the preparation of bulk amorphous composite materials by traditional percolation casting

Method used

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  • Method and device for preparing large-size bulk amorphous composite materials
  • Method and device for preparing large-size bulk amorphous composite materials
  • Method and device for preparing large-size bulk amorphous composite materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1. Several pieces of VIT1 amorphous flakes with different thicknesses were prepared by the copper mold suction casting method. Take out three of them, such as figure 2 The I, II, III non-wafers shown, the overlapping height of the three non-wafers is 4.7mm, and they are sequentially polished with 400~1000# sandpaper, and cleaned in acetone and alcohol using ultrasonic waves, and placed in the mold after overlapping. superior. The initial pressure of the indenter at both ends of the Gleeble is 150MPa (the pressure is 294kgf), and the surface of the amorphous sheet is blown with high-purity argon for protection, and heated. The heating rate is 20K / min, and the heating upper limit is 410°C. During the test, the pressure was always maintained at 150MPa. The compression plastic deformation is very fast, and the holding time is very short. After the plastic deformation, the temperature is increased within a few degrees, and then unloaded, and the sample is taken ou...

Embodiment 2

[0026] In the experiment, the polished and cleaned VIT1 bulk amorphous and tungsten composite wires were wrapped in layers and orderly. The directions are perpendicular to each other. figure 1 The upper and lower heating furnaces are first heated to a certain temperature, and then put the package into the figure 1 In the backing plate mold, heating is carried out at a heating rate of 40K / min, and then heat preservation and pressure are applied. The relationship between heating temperature and heating time is as follows Figure 4 As shown in (a), the relationship between heating time and displacement is as follows Figure 4 As shown in (b), the relationship between loading load and heating time is as follows Figure 4 (c) shows. In the test, the final compressive stress is 100MPa. The morphology of the prepared composite material is as follows Figure 4 shown.

Embodiment 3

[0028] Others are the same as in Example 2. In the test, five layers of 0.2mm amorphous flakes sandwich four layers of tungsten composite double wires (a 0.2mm×0.4mm cross-sectional shape of the amorphous composite double wires is selected), and the final compressive stress is 50MPa. The morphology of the as-prepared composites is as follows: Figure 5 shown.

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Abstract

The invention provides a method for preparing large-size bulk amorphous composite materials, which belongs to the field of preparing amorphous alloy (metallic glass) and composite materials thereof. The method applies to superplastic diffusion bonding of bulk amorphous substances and fiber, and is characterized in that the bulk amorphous substances and the fiber are arranged in a certain mode (such as a layered mode and the like), put into a mold, pressurized and thermally insulated under gas protection or vacuum for superplastic diffusion bonding; pressure is released after a certain period of time; and workpieces are taken out of the mold. The invention also provides a novel device for preparing large-size bulk amorphous, fiber / amorphous composite materials through superplastic diffusion bonding. The device consists of a heating system, a heat insulation system, a mold system, a loading system, a gas protection system and a cooling system. The method and the device have the advantages of reinforcing the fiber, enabling the shape of amorphous alloy-base composite materials to be designed, enabling the volume of the fiber in the composite materials to be controlled and enabling the fiber to be used in other various amorphous alloy systems low in amorphous formation capability, and are applicable to armor boards, armor-piercing shells and the like.

Description

technical field [0001] The invention belongs to the field of bulk amorphous and its composite material preparation, and is suitable for preparing bulk amorphous or Fiber / amorphous composites with different fiber volume contents. Background technique [0002] Amorphous composite materials are brand new materials. Amorphous has very high yield strength, its value can reach 2GPa, high elastic strain (2%). The deformation of amorphous materials is carried out by highly localized shear flow. The localization of shear bands is due to the lack of strain hardening (work hardening). The deformation process of amorphous materials is often accompanied by adiabatic heating. What occurs is strain softening or heat softening. We can observe large plastic strains and softened river patterns in shear bands. In the absence of geometric constraints, failure will traverse the specimen cross-section along a single shear band, so although localized plastic strains are large in one shear band...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C47/20
Inventor 陈晓华陈国良张勇张宝玉惠希东吕昭平刘雄军
Owner UNIV OF SCI & TECH BEIJING
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