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High-oxygen-content iron-based amorphous composite powder and preparation method thereof

A composite powder, iron-based amorphous technology is applied in the field of preparation of amorphous alloys and composite materials, which can solve the problem of hindering the amorphous transformation of alloy powders, increasing the viscosity of amorphous powders, and reducing the supercooled liquid phase. Area width and other issues, to achieve the effect of saving raw materials, high oxygen content, and simple processing

Active Publication Date: 2013-01-30
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, compared with the casting method, the limit value of the oxygen content allowed to be introduced by mechanical alloying is larger. However, when the oxygen content exceeds a certain limit value, the oxygen introduced will increase the temperature of the amorphous powder at high temperature (or supercooled liquid phase region). ) viscosity, reducing the width of the supercooled liquid phase region, which will promote the formation of other oxygen-containing compounds, hindering the tendency of the alloy powder to transform into an amorphous state

Method used

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  • High-oxygen-content iron-based amorphous composite powder and preparation method thereof

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Effect test

Embodiment 1

[0029] Step 1: mix powder

[0030] Mix iron powder, copper oxide powder, iron phosphorus powder, carbon powder, and boron powder according to the following atomic percentages: Fe 77at.%, Cu 4at.%, P 9at.%, C 6at.%, B 1at .%, O 3at.%, and contain inevitably introduced trace impurities. Iron, carbon, and boron are all added in the form of simple substances, phosphorus is added in the form of phosphorus-iron compounds, and copper and oxygen are added in the form of copper oxide compounds. Among them, the particle size of iron powder, copper oxide powder, carbon powder, and boron powder is about 48 μm, with a purity of >99.9%, and the particle size of iron phosphorus powder is about 14 μm, with a purity of >99.9%.

[0031] Step 2: Mix the powder

[0032] Put the proportioned iron, copper oxide, phosphorus iron powder, carbon, and boron powder in step 1 into a V-type powder mixer and mix for 10 hours to obtain a nominal composition of Fe 77 Cu 4 P 9 C 6 B 1 o 3 mixed powder...

Embodiment 2

[0036] Step 1: mix powder

[0037] Mix iron, copper oxide, ferrophosphorus powder, carbon, and boron powder according to the following atomic percentages: Fe 75at.%, Cu 4at.%, P 7at.%, C 7at.%, B 3at.%, O 4at.%, and contains trace impurities inevitably introduced. Iron, carbon, and boron are all added in the form of simple substances, phosphorus is added in the form of phosphorus-iron compounds, and copper and oxygen are added in the form of copper oxide compounds. Among them, the particle size of iron powder, copper oxide powder, carbon powder, and boron powder is about 48 μm, with a purity of >99.9%, and the particle size of iron phosphorus powder is about 14 μm, with a purity of >99.9%.

[0038] Step 2: Mix the powder

[0039] Put the proportioned iron, copper oxide, ferrophosphorus powder, carbon, and boron powder in step 1 into a V-type powder mixer and mix for 12 hours to obtain a nominal composition of Fe 75 Cu 4 P 7 C 7 B 3 o 4 mixed powder.

[0040] Step 3: H...

Embodiment 3

[0043] Step 1: mix powder

[0044] Mix iron, copper oxide, ferrophosphorus powder, carbon, and boron powder according to the following atomic percentages: Fe 76at.%, Cu 5at.%, P 8at.%, C 5at.%, B 1at.%, O 5at.%, and contains trace impurities that are inevitably introduced. Iron, carbon, and boron are all added in the form of simple substances, phosphorus is added in the form of phosphorus-iron compounds, and copper and oxygen are added in the form of copper oxide compounds. Among them, the particle size of iron powder, copper oxide powder, carbon powder, and boron powder is about 48 μm, with a purity of >99.9%, and the particle size of iron phosphorus powder is about 14 μm, with a purity of >99.9%.

[0045] Step 2: Mix the powder

[0046] Put the proportioned iron, copper oxide, ferrophosphorus powder, carbon, and boron powder in step 1 into a V-type powder mixer and mix for 16 hours to obtain a nominal composition of Fe 76 Cu 5 P 8 C 5 B 1 o 5 Mix powder.

[0047] St...

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Abstract

The invention discloses high-oxygen-content iron-based amorphous composite powder and a preparation method thereof. The preparation method comprises the following steps: proportioning the following materials in atom percentage: 74-78at.% of Fe, 4-6at.% of Cu, 7-9at.% of P, 5-7at.% of C, 1-3at.% of B and 4-6at.% of O; mixing; and performing high-energy ball milling to obtain the high-oxygen-content iron-based amorphous composite powder, wherein the volume fraction of an amorphous phase exceeds 90%, and the microstructure takes the amorphous phase as the base and takes alpha-Fe nanocrystal as a second phase. According to the invention, the designed composite powder has high amorphism forming capacity, a wide supercooled liquid phase region is obtained, and the adverse effect of oxygen on iron-based alloy amorphism forming is overcome, thereby being beneficial to the design of a new alloy system. The method is simple and convenient to operate, and can provide a raw material for the preparation of a high-density big amorphous composite material based on a sintering method.

Description

technical field [0001] The invention relates to a preparation method of an amorphous alloy and a composite material thereof, in particular to an iron-based amorphous composite powder with high oxygen content and a preparation method thereof. Background technique [0002] Iron-based amorphous alloys have excellent mechanical properties such as high strength, high hardness, high elastic modulus, high wear resistance, excellent magnetic properties and corrosion resistance, and also have the advantage of low cost, which has gradually attracted researchers. widespread attention. With the deepening of research, the size of iron-based bulk amorphous alloys is getting larger and larger. As functional materials and structural materials, they have been practically used in the fields of electronics, petrochemicals, magnetic materials, and military industries. At present, iron-based amorphous alloys and their composite materials are mainly prepared by casting method and powder metallur...

Claims

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Application Information

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IPC IPC(8): C22C45/02B22F9/04B22F1/00
Inventor 杨超魏田程琴荣李元元
Owner SOUTH CHINA UNIV OF TECH
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