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Biodegradable iron-zinc alloy and preparation method thereof

An iron-zinc and biological technology, applied in the field of biodegradable iron-zinc alloy and its preparation, can solve the problems of hindering the corrosion process of the iron-zinc alloy substrate, slow electrodeposition speed, and large difference in melting point, etc. Degradability and mechanical properties, fast cooling effect

Active Publication Date: 2018-09-07
JIANGXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the melting points of the two are very different, and it is impossible to obtain iron-zinc alloys by conventional smelting methods.
[0005] At present, the preparation method of iron-zinc alloy mainly adopts the method of electrodeposition, but the speed of electrodeposition is very slow, and oxygen atoms will be introduced into the matrix, so that the production of zinc oxide with high corrosion resistance is formed, which hinders the production of iron Corrosion Process of Zinc Alloy Substrate
At the same time, the processed materials are only in the shape of layers and rods, and it is difficult to process structures with only complex internal pores.

Method used

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Experimental program
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Effect test

Embodiment 1

[0047]Use 50μm iron powder and 50μm zinc powder as raw materials, weigh 0.9g iron powder and 0.1g zinc powder according to the mass ratio of 90:10, and ball mill under the protection of 99.999% high-purity argon gas. 10:1, ball milling time 40h, iron-zinc supersaturated solid solution alloy powder is obtained after ball milling.

[0048] The obtained iron-zinc supersaturated solid solution alloy powder is placed in the molding chamber of the optical fiber sintering system, and the sintering temperature is controlled under the technological conditions of 99.999% high-purity argon gas protection, a spot diameter of 100 μm, a laser power of 180W, and a scanning speed of 10mm / s The temperature is 1300 ℃, and the biodegradable iron-zinc alloy is prepared by selective laser melting process.

[0049] Phase detection found ( figure 1 ), the prepared iron-zinc alloy only has iron diffraction peaks, indicating that zinc is completely dissolved in the iron matrix to form a supersaturate...

Embodiment 2

[0053] Use 50μm iron powder and 50μm zinc powder as raw materials, weigh 0.9g iron powder and 0.1g zinc powder according to the mass ratio of 90:10, and ball mill under the protection of 99.999% high-purity argon gas. 10:1, ball milling time 40h, iron-zinc supersaturated solid solution alloy powder is obtained after ball milling.

[0054] Under the technological conditions of 99.999% high-purity argon protection, spot diameter of 100 μm, laser power of 100 W, and scanning speed of 25 mm / s, the sintering temperature was controlled at 1000 ° C, and the iron-zinc alloy was prepared by selective laser melting process.

[0055] Phase detection found that the prepared iron-zinc alloy only had iron diffraction peaks, indicating that zinc was completely dissolved in the iron matrix to form a supersaturated solid solution; the grain size was 5-12 μm; electrochemical analysis found that the iron-zinc alloy was Corrosion potential in -0.64V, corrosion current density 6.92μA / cm 2 , the c...

Embodiment 3

[0057] Use 50μm iron powder and 50μm zinc powder as raw materials, weigh 0.9g iron powder and 0.1g zinc powder according to the mass ratio of 90:10, and ball mill under the protection of 99.999% high-purity argon gas. 10:1, ball milling time 40h, iron-zinc supersaturated solid solution alloy powder is obtained after ball milling.

[0058] Under the technological conditions of 99.999% high-purity argon protection, spot diameter of 100 μm, laser power of 80 W, and scanning speed of 30 mm / s, the sintering temperature was controlled at 800 ° C, and the iron-zinc alloy was prepared by selective laser melting process.

[0059] Phase detection found that the prepared iron-zinc alloy only had iron diffraction peaks, indicating that zinc was completely dissolved in the iron matrix to form a supersaturated solid solution; the grain size was 5-10 μm; electrochemical analysis found that the iron-zinc alloy was Corrosion potential in -0.65V, corrosion current density 5.61μA / cm 2 , the cor...

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Abstract

The invention relates to a biodegradable iron-zinc alloy and a preparation method thereof, and belongs to the technical field of design and manufacture of biomedical iron-zinc alloys. The iron-zinc alloy consists of 80-95% of iron and 5-20% of zinc according to the mass percentage. The preparation method comprises the steps: preparing an iron powder and a zinc powder according to the designed components, carrying out ball milling for more than 20 h at the rotational speed of 240-400 r / min under protection of argon gas, to obtain an iron-zinc alloy powder; then using the iron-zinc alloy powder,and under the protection of argon gas, adopting a selective laser sintering process, controlling the laser power to 100-200 W, controlling the scanning rate to 10-30 mm / s, controlling the sintering temperature to 750-1400 DEG C, controlling the light spot diameter to 80-120 [mu]m, and thus preparing the iron-zinc alloy. The biodegradable iron-zinc alloy is molded by combining mechanical alloyingwith selective laser sintering. The biodegradable iron-zinc alloy has suitable degradation rate, high mechanical strength and good biocompatibility, and has a good application prospect in the field ofbone tissue repair.

Description

technical field [0001] The invention relates to a biodegradable iron-zinc alloy and a preparation method thereof, and belongs to the technical field of biomedical iron-zinc alloy design and manufacture. Background technique [0002] Biodegradable materials have attracted great attention in recent years. Currently common biodegradable materials are mainly divided into three categories, including biopolymers, bioceramics and biodegradable metals. Among them, the strength of biopolymer materials is insufficient, and the plasticity and toughness of bioceramics are poor, so their clinical application is greatly limited. Recently, the research of a new generation of medical metal materials with biodegradable properties represented by iron-based and zinc-based alloys has received special attention. This new type of medical metal material has changed the traditional idea that people usually use metal implant materials as biologically inert materials, and cleverly uses the characte...

Claims

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Application Information

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IPC IPC(8): C22C38/00C22C33/02B22F9/04
CPCB22F9/04B22F2009/041C22C33/0278C22C38/002
Inventor 帅词俊杨友文彭淑平
Owner JIANGXI UNIV OF SCI & TECH
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