Medical ultra-fine grain titanium alloy with ultrahigh plasticity, high strength and low modulus and preparation method thereof

An ultra-fine grain, titanium alloy technology, used in medical science, prosthesis, etc., to achieve the effect of controllable grain size, simple processing process, and small grain size

Active Publication Date: 2015-01-07
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN 102534301A discloses a high-strength and low-modulus medical ultra-fine-grained titanium-based composite material and its preparation method. The alloy is prepared by powder metallurgy and has fine grains, but its elastic modulus is about 55GPa and the fracture strain is 6.8 %~9.4%, therefore, there is a large room for decrease in elastic modulus, and there is a large room for improvement in plasticity

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  • Medical ultra-fine grain titanium alloy with ultrahigh plasticity, high strength and low modulus and preparation method thereof
  • Medical ultra-fine grain titanium alloy with ultrahigh plasticity, high strength and low modulus and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0040] Prepare ultra-high plasticity, high-strength and low-mode medical ultra-fine-grained titanium alloys according to the following steps:

[0041] Step 1: Mix the powder

[0042] First, according to the following elements and element atomic percentage ingredients: Ti: 68at.%, Nb: 23at.%, Zr: 5at.%, Ta: 2at.%, Si: 2at.%, and unavoidable trace impurities; all components The components are all elemental powders, the average particle size is about 48 μm, and the purity of the particle powder is above 99.5wt.%. The elemental powders were then mixed for 4 hours in a V-0.002 mixer.

[0043] Step 2: Preparation of amorphous alloy powder by high energy ball milling

[0044] The well-mixed elemental powders were placed in a QM-2SP20 planetary ball mill for high-energy ball milling. The ball milling tank and balls were made of stainless steel. The diameters of the balls were 15, 10, and 6 mm, respectively, and the weight ratio was 1:3:1. The high-energy ball milling process parame...

Embodiment 2

[0055] Prepare ultra-high plasticity, high-strength and low-mode medical ultra-fine-grained titanium alloys according to the following steps:

[0056] Step 1: Mix the powder

[0057] First, according to the following elements and element atomic percentage ingredients: Ti:65at.%, Nb:24at.%, Zr:5at.%, Ta:1at.%, Si:5at.%, and unavoidable trace impurities; all components The components are all elemental powders, the average particle size is about 48 μm, and the purity of the particle powder is above 99.5wt.%. The elemental powders were then mixed for 4 hours in a V-0.002 mixer.

[0058] Step 2: Preparation of amorphous alloy powder by high energy ball milling

[0059] The well-mixed elemental powders were placed in a QM-2SP20 planetary ball mill for high-energy ball milling. The ball milling tank and balls were made of stainless steel. The diameters of the balls were 15, 10, and 6 mm, respectively, and the weight ratio was 1:3:1. The high-energy ball milling process parameters ...

Embodiment 3

[0070] Prepare ultra-high plasticity, high-strength and low-mode medical ultra-fine-grained titanium alloys according to the following steps:

[0071] Step 1: Mix the powder

[0072] First, according to the following elements and element atomic percentage ingredients: Ti: 70at.%, Nb: 24at.%, Zr: 5at.%, Ta: 1at.%, Si: 0at.%, and unavoidable trace impurities; all components All are elemental powders, the average particle size is about 48 μm, and the purity of the particle powder is above 99.5wt.%. The elemental powders were then mixed for 4 hours in a V-0.002 mixer.

[0073] Step 2: Preparation of amorphous alloy powder by high energy ball milling

[0074] The well-mixed elemental powders were placed in a QM-2SP20 planetary ball mill for high-energy ball milling. The ball milling tank and balls were made of stainless steel. The diameters of the balls were 15, 10, and 6 mm, respectively, and the weight ratio was 1:3:1. The high-energy ball milling process parameters are as fol...

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Abstract

The invention discloses a medical ultra-fine grain titanium alloy with ultrahigh plasticity, high strength and low modulus and a preparation method thereof. The medical ultra-fine grain titanium alloy contains the following specific components in atomic percent: 60-70% of Ti, 16-24% of Nb, 5-14% of Zr, 1-8% of Ta, 0-5% of Si, and inevitable trace impurities. The preparation method of the medical ultra-fine grain titanium alloy is a formation method of the powder metallurgy sintering technology combined with an amorphous crystallization method; specifically, powder mixing and high-energy ball milling are performed until the content of the amorphous phase is maximum, next, the powder metallurgy sintering technology is adopted to solidify the alloy powder, and finally, a spark plasma sintering system or a vacuum hot pressing furnace is adopted for sintering by use of pulse current or radiation heating. The prepared complex-structure medical ultra-fine grain titanium alloy with ultrahigh plasticity, high strength and low modulus is good in biocompatibility, controllable in grain size, excellent in comprehensive mechanical properties and bright popularization and application prospect.

Description

technical field [0001] The invention belongs to the technical field of preparation of metal ultra-fine-grained materials and composite structural materials, and in particular relates to an ultra-high plasticity, high-strength and low-modulus medical ultra-fine-grained titanium alloy and a preparation method thereof. Background technique [0002] Biomedical materials refer to materials that are used for medical purposes to diagnose, treat, repair or replace human tissues and organs or enhance their functions. The medical materials used to manufacture various artificial joints and artificial bones in orthopedics mainly include polymer materials, metal materials, non-metal materials and composite materials. In view of the high strength, toughness and excellent processing performance of metal materials, they can be used as artificial knee joints, hip joints, dental implants, tooth roots and denture metal brackets, etc., and thus have been widely used in surgical transplantation....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22C1/05A61L27/06
Inventor 杨超李玉华赵海东张卫文屈盛官李小强肖志瑜李元元
Owner SOUTH CHINA UNIV OF TECH
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