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High-ductility titanium based ultra-fine crystal composite material and method for producing the same

A composite material and ultra-fine-grain technology, which is applied in the field of metal ultra-fine-grain alloy preparation, can solve the problems that there are no high-plastic ultra-fine-grain composite materials, and achieve excellent comprehensive mechanical properties, high strength, and convenient operation.

Inactive Publication Date: 2009-07-29
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no literature report on the preparation of high-plasticity ultra-fine-grained composites related to bulk metallic glasses by powder metallurgy technology and amorphization crystallization

Method used

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  • High-ductility titanium based ultra-fine crystal composite material and method for producing the same
  • High-ductility titanium based ultra-fine crystal composite material and method for producing the same
  • High-ductility titanium based ultra-fine crystal composite material and method for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Step 1: Mix the powder

[0036] Firstly, the ingredients are formulated according to the following elements and their atomic percentages: Ti 66at.%, Nb 13at.%, Cu8at.%, Ni 6.8at.%, Al 6.2at.%, and the rest are unavoidable trace impurities. Titanium, niobium, copper, nickel and aluminum are all added in the form of simple substances, and the average particle size of each element powder is about 75μm. Except for the purity of aluminum which is 99.4wt.%, the purity of other particle powders is higher than 99.9 wt.%. Then, the blended powders were dry blended in a V-0.002 type blender for 24 hours.

[0037] Step 2: Preparation of amorphous alloy powder by high energy ball milling

[0038] The QM-2SP20 planetary ball mill is used to complete the high-energy ball mill. The balls of the QM-2SP20 planetary ball mill and the inner wall of the ball mill are made of stainless steel, and the mass ratio of the ball to material is 12:1. Atmosphere, ball milling speed is 3.8s -1 ,...

Embodiment 2

[0049] Step 1: Mix the powder

[0050] Firstly, the ingredients are formulated according to the following elements and their atomic percentages: Ti 66at.%, Nb 13at.%, Cu8at.%, Ni 6.8at.%, Al 6.2at.%, and the rest are unavoidable trace impurities. Titanium, niobium, copper, nickel and aluminum are all added in the form of simple substances, and the average particle size of each element powder is about 75μm. Except for the purity of aluminum which is 99.4wt.%, the purity of other particle powders is higher than 99.9 wt.%. Then, the mixed powder was dry mixed in a V-0.002 type powder mixer for 24 hours;

[0051] Step 2: Preparation of amorphous alloy powder by high energy ball milling

[0052] The QM-2SP20 planetary ball mill is used to complete the high-energy ball mill. The balls of the QM-2SP20 planetary ball mill and the inner wall of the ball mill are made of stainless steel, and the mass ratio of the ball to material is 12:1. Atmosphere, ball milling speed is 3.8s -1 , ...

Embodiment 3

[0063] Step 1: Mix the powder

[0064] First, the ingredients are formulated according to the following elements and their atomic percentages: Ti 66at.%, Nb 18at.%, Cu6.4at.%, Ni 6.1at.%, Al 3.5at.%, and the rest are unavoidable trace impurities. Titanium, niobium, copper, nickel and aluminum are all added in the form of simple substances, and the average particle size of each element powder is about 75μm. Except for the purity of aluminum which is 99.4wt.%, the purity of other particle powders is higher than 99.9 wt.%. Then, the blended powders were dry blended in a V-0.002 type blender for 24 hours.

[0065] Step 2: Preparation of amorphous alloy powder by high energy ball milling

[0066] The QM-2SP20 planetary ball mill is used to complete the high-energy ball mill. The balls of the QM-2SP20 planetary ball mill and the inner wall of the ball mill are made of stainless steel, and the mass ratio of the ball to material is 10:1. Atmosphere, ball milling speed is 3.8s -1 ,...

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Abstract

The invention relates to a high-plasticity ultrafine-grained Ti-based composite material and a preparation method thereof. The high-plasticity ultrafine-grained Ti-based composite material of the invention takes Beta-Ti as matrix phase, and the (Cu, Ni)Ti2 as wild phase. The preparation method of the composite material is a combined method of the pulse current sintering technology and the amorphous crystallization method, and comprises steps of mixing powder and high-energy ball milling, and the obtained powdered alloy has wide super-cooled liquid phase region and the amorphous phase accounts for at least 90% of the volume, then rapidly sintering with a discharging plasma sintering system at a sintering temperature Ts which is more than or equal to amorphous alloy powder crystallization temperature +200K and is less than or equal to the melting temperature -100k of the amorphous alloy powder, and at 40-500MPa for 1-20 minutes. Mixture ratio of elements in the invention is reasonable, and the obtained large-size ultrafine-grained Ti-based composite material has excellent comprehensive mechanical property and good prospects for popularization and application.

Description

technical field [0001] The invention relates to the preparation technology of metal ultra-fine-grained alloys, in particular to a high-plasticity titanium-based ultra-fine-grained composite material and a preparation method thereof. Background technique [0002] Bulk metallic glasses have excellent properties such as high strength, high hardness, and high modulus of elasticity. As a new type of functional material and engineering material, it has broad application prospects in aerospace, military industry, electronics, instrumentation and other fields. However, most existing bulk metallic glasses have low plasticity, which limits their application in structural materials. How to improve its plasticity and develop high-plastic bulk metallic glasses and related composite materials has always been the goal pursued by researchers. [0003] At present, the developed high-plastic bulk metallic glasses and their related composite materials mainly include the following types: (1) ...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C1/04B22F3/105
CPCY02P10/25
Inventor 李元元杨超陈维平李小强屈盛官夏伟邵明张文
Owner SOUTH CHINA UNIV OF TECH
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