Dual composite high strength and toughness block amorphous alloy and preparation method thereof

An amorphous alloy and high-strength technology, which is applied in the field of amorphous composite materials and its preparation, can solve the problems of not being able to prepare double-composite amorphous composite materials, and achieve improved interface wetting conditions, simulated interface reactions, and dense structures. Effect

Active Publication Date: 2011-01-26
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Obviously, the continuous fiber reinforcement phase cannot be added by this method, so it is impossible to prepare a dual-c

Method used

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  • Dual composite high strength and toughness block amorphous alloy and preparation method thereof
  • Dual composite high strength and toughness block amorphous alloy and preparation method thereof
  • Dual composite high strength and toughness block amorphous alloy and preparation method thereof

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preparation example Construction

[0020] A method for preparing a dual-composite high-strength and tough bulk amorphous alloy of the present invention comprises the following steps:

[0021] In the first step, the matrix composition of the Zr-Ti-Nb-Cu-Ni-Be master alloy is selected to deviate from the eutectic point, and it is melted into a master alloy ingot by arc melting; or the Mg-TM-RE-Zn alloy is selected as the matrix phase , add an element to the matrix phase alloy, the formation enthalpy of the compound of this element and the main element Mg is positive, and the enthalpy with TM in the alloy is negative, and the high melting point components TM and RE are prepared into an intermediate alloy by arc melting, and the intermediate The alloy is crushed and put into the container together with the low melting point components Mg and Zn, and the master alloy is made by induction melting;

[0022] In the second step, the surface-treated continuous fiber is cut into small sections, straightened, and loaded in...

Embodiment 1

[0044] (1) Selection of matrix alloy composition

[0045] The purity of each metal component selected for preparing the master alloy ingot is shown in Table 1, and the nominal composition of the alloy is Zr56.2Ti13.8Nb5.0Cu6.9Ni5.6Be12.5 (atomic percentage).

[0046] Table 1 Purity of selected metal components for preparing master alloy ingots (%)

[0047]

[0048] (2) Preparation of master alloy ingot

[0049] Under the conditions of Ti inhalation and high-purity argon protection, master alloy buckle ingots were melted in a non-consumable arc melting furnace.

[0050] The specific procedure for the preparation of master alloy buckle ingots is as follows:

[0051] After the surface of the metal raw material is mechanically polished to remove the oxide skin on the surface, the ingredients are proportioned according to the designed composition; the weighing is accurate to within 0.005g, and the prepared material is put into the melting furnace according to the weight of abo...

Embodiment 2

[0059] The composition of the matrix alloy is Zr60Ti14.67Nb5.33Cu5.56Ni4.44Be10 (atomic percentage), and the additional reinforcing phase is W fiber with a diameter of 0.28mm, and the volume fraction is 65%. Step 3 of Example 1 is the same, except that the holding temperature is 950°C, the holding time is 30 minutes, and the pressure of infiltration casting is 2MPa.

[0060] The performance test is the same as step 4 of Example 1. The endogenous reinforcing phase in the composite material is spherical β-Zr with a size of 10-80 μm. The yield strength of the prepared dual-phase composite material is 1650MPa, the fracture strength is 2170MPa, and the total fracture strain is 28%; Compared with the amorphous composite material with the same matrix composition and only containing endogenous spherulite reinforcement phase, the yield strength can be increased by 65%, the fracture strength can be increased by 14.8%, and the room temperature compression plasticity can be increased by 24...

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Abstract

The invention discloses a dual composite high strength and toughness block amorphous alloy and preparation method thereof. Adscititious continuous fibers and endogenous wide phases are distributed in an amorphous alloy matrix, wherein the matrix is a zirconium base or a magnesium base and comprises the chemical components of Zr-Ti-Nb-Cu-Ni-Be, (Mg0.65Cu0.10Ni0.10Re0.10Zn0.05)100-xZrx and Mg-Cu-Y-Zn. The preparation method adopts a melt pressurizing penetration casting method and comprises the following steps of: directly injecting a liquid metal glass master alloy into a continuous tungsten wide phase preform; directly maintaining the temperature to separate out a spherical endogenous phase without a solidification process; and performing fast quenching forming to obtain a high strength and toughness amorphous composite material of which the matrix contains both the adscititious continuous fibers and the endogenous spherical wide phases. According to the invention, the dual composite high strength and toughness block amorphous alloy, which has an impact structure, high performance, the adscititious continuous fibers and the endogenous wide phases, can be successfully prepared.

Description

technical field [0001] The invention relates to an amorphous composite material and a preparation method thereof, in particular to an amorphous composite material containing double reinforcing phases in an amorphous matrix and a preparation method thereof. Background technique [0002] Since the 1980s, bulk amorphous alloys have become a hot and frontier issue in international research because of their excellent mechanical properties. However, almost all single amorphous alloy materials are brittle macroscopically, which seriously limits their application in engineering. In order to solve this serious problem, a second phase is introduced into the single amorphous matrix to form an amorphous composite material, which can not only exert the high strength characteristics of the amorphous alloy, but also greatly improve the plasticity compared with the single amorphous alloy. . In 1998, Jonhson et al prepared continuous fiber zirconium-based amorphous composite materials by a...

Claims

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Application Information

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IPC IPC(8): C22C45/00C22C45/10C22C49/04C22C49/10
Inventor 陈光高度杜宇雷
Owner NANJING UNIV OF SCI & TECH
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