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

An amorphous composite material and large-size technology, which is applied in the field of fiber/amorphous composite materials, can solve problems such as size and interface reaction limitations, and achieve the effects of reducing interface reactions, controlling mechanical properties, and precise pressure control

Inactive Publication Date: 2011-10-12
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
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Effect test

Embodiment 1

[0024] Example 1. A number of VIT1 amorphous flakes with different thicknesses were prepared by copper mold suction casting method. Take out three of them, such as figure 2 The I, II, and III non-wafers shown, the overlapping height of the three non-wafers is 4.7mm, and they are polished sequentially with 400-1000# sandpaper, and cleaned in acetone and alcohol using ultrasonic waves, and placed on the mold after overlapping superior. The indenters at both ends of Gleeble apply an initial pressure of 150MPa (pressure 294kgf), blow high-purity argon gas on the surface of the amorphous sheet for protection, and heat at a heating rate of 20K / min, with a heating upper limit of 410°C, and keep warm after the temperature reaches 410°C. During the test, the pressure is 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 raised within a few degrees, and then unloaded, and...

Embodiment 2

[0026] In the experiment, the polished and cleaned VIT1 bulk amorphous and tungsten composite wires were layered and wrapped in an orderly manner. Three layers of amorphous wafers sandwiched two layers of composite monofilaments (0.2 mm in diameter), and the two layers of composite monofilaments were placed The directions are perpendicular to each other. figure 1 The upper and lower heating furnaces are first heated to a certain temperature, and then the bag is put into figure 1 In the backing plate mold, heat at a heating rate of 40K / min, and then keep warm and pressurize. 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) shown. In the test, the final compressive stress is 100MPa pressure. The morphology of the prepared composite material is a...

Embodiment 3

[0028] Others are the same as in Example 2. In the test, five layers of 0.2mm amorphous sheets are sandwiched by four layers of tungsten composite twin wires (amorphous composite twin wires with a cross-sectional shape of 0.2mm×0.4mm are selected), and the final compressive stress is 50MPa. The morphology of the prepared composite material 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 preparation of bulk amorphous and composite materials thereof, and is suitable for preparing bulk amorphous or bulk amorphous by superplastic forming (SPF) and diffusion bonding (DB) technologies between bulk amorphous wafers and fibers with amorphous coatings. 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 caused by the lack of strain hardening (work hardening). The deformation process of amorphous materials is often accompanied by adiabatic heating process. It is possible What occurs is strain softening or heat softening. We can observe large plastic strains in the shear bands and river patterns caus...

Claims

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Application Information

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Patent Type & Authority Patents(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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