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Zn-Ag series zinc alloy as well as preparation method and application thereof

A technology of zinc alloy and zn-ag, which is applied in prosthesis, surgery, coating, etc., can solve problems such as obstruction and slow degradation rate, and achieve the effects of excellent antibacterial performance, good biocompatibility and blood compatibility

Active Publication Date: 2017-12-12
PEKING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although magnesium alloys have a series of advantages, rapid degradation and serious hydrogen evolution have always been a bottleneck that is difficult to overcome in the application of magnesium alloys.
At the same time, compared with magnesium alloys, iron-based alloys can exist more stably in the body, and the degradation rate is too slow, and its corrosion products will cause inflammation and other problems, which hinders its further application. Therefore, the development of a suitable degradation rate and Degradable metal materials with good tissue compatibility become a demand

Method used

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  • Zn-Ag series zinc alloy as well as preparation method and application thereof
  • Zn-Ag series zinc alloy as well as preparation method and application thereof
  • Zn-Ag series zinc alloy as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Embodiment 1, preparation cast state Zn-Ag series zinc alloy

[0077] Using pure Zn (99.99wt.%) and pure Ag (99.95wt.%) (purchased from Huludao Zinc Industry Co., Ltd.) as raw materials, according to different mass ratios (the mass ratio of Zn to Ag is 98:2, 99 : 1, 99.5: 0.5) mixed in CO 2 +SF 6 Under the protection of the atmosphere, smelting at 800 ° C, after the raw materials are fully melted, after 10 minutes of heat preservation, the circulating water is rapidly cooled, and the Zn-Ag alloy ingot (that is, the Zn-Ag alloy of the present invention, the macroscopic photo is as follows: figure 1 shown), where Zn-0.5Ag means that the mass ratio of Zn to Ag is 99.5:0.5, Zn-1Ag means that the mass ratio of Zn to Ag is 99:1, and Zn-2Ag means that the mass ratio of Zn to Ag is 98: 2.

Embodiment 2

[0078] Embodiment 2, preparation extruded state Zn-Ag series alloy

[0079] First, according to the steps in Example 1 of the present invention, the as-cast Zn-Ag alloy ingot is prepared, and the Zn-Ag alloy bar is prepared by extrusion (that is, the Zn-Ag zinc alloy of the present invention, the macroscopic photo is as follows: figure 2 As shown), radial extrusion is adopted, the ingot is held for 2 hours, the holding temperature is 260°C, the extrusion temperature is 260°C, the extrusion ratio is 36, and the extrusion speed is 1mm / s to prepare a Zn-Ag alloy with a diameter of 10mm bar.

Embodiment 3

[0080] Embodiment 3, Zn-Ag system zinc alloy microstructural analysis:

[0081] The Zn-Ag series zinc alloy in Example 1 of the present invention was prepared by wire cutting to prepare a φ10×2mm sample, which was successively polished and polished by 400#, 800#, 1200# and 2000# SiC sandpaper series. After ultrasonic cleaning in acetone, absolute ethanol and deionized water for 15 min, dry at 25 °C. The sample was subjected to X-ray diffraction analysis, etched with 4% nitric acid alcohol for 5-30 seconds, washed with deionized water, dried, and observed under a metallographic microscope.

[0082] image 3 It is the metallographic phase of Zn-Ag zinc alloy, which is determined by image 3 It can be seen that after extrusion treatment, the grain size is significantly reduced, and the second phase is uniformly distributed at the grain boundary. With the increase of Ag content, the acicular second phase becomes more obvious. Figure 4 It is the X-ray diffraction analysis figur...

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Abstract

The invention discloses a Zn-Ag series zinc alloy as well as a preparation method and an application thereof. The Zn-Ag series zinc alloy consists of Zn and Ag; and in percentage by weight, the Ag accounts for 0-30%, not including 0, in the Zn-Ag series zinc alloy by mass. The preparation method comprises the following steps: (1) mixing the Zn and the Ag, so that a mixture is obtained; and (2) processing the mixture in accordance with a step a) or a step b), and cooling the processed mixture, so that the Zn-Ag series zinc alloy is obtained: a) in a CO2 and SF6 atmosphere, melting or sintering the mixture; and b) in a vacuum atmosphere, dissolving hydrogen in the mixture and implementing the melting. The Zn-Ag series zinc alloy prepared by the invention is appropriate in mechanical performance, adjustable in corrosion rate and excellent in cell compatibility and blood compatibility, and the Zn-Ag series zinc alloy is also excellent in antibacterial performance; and the Zn-Ag series zinc alloy is applicable to preparation of bio-medical implantation apparatuses.

Description

technical field [0001] The invention relates to a Zn-Ag series zinc alloy and its preparation method and application, belonging to the technical field of medical metal material preparation. Background technique [0002] In recent years, due to their excellent mechanical properties, biocompatibility and in vivo degradability, degradable metals have attracted more and more attention in the field of biomedicine, especially in the field of implanted medical devices. [0003] The degradable metal materials that have been extensively studied at present mainly include magnesium, iron, zinc and their alloys. Among them, degradable medical magnesium alloy is a research hotspot in recent years. Different alloy systems such as Mg-Ca, Mg-Sr, Mg-Zn, etc., the design of new structures such as porous, nanocrystalline and amorphous structures, and surface modification Technology emerges in an endless stream, and many measures have made the application field of magnesium alloy more and more...

Claims

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Application Information

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IPC IPC(8): A61L31/02A61L31/08A61L31/16A61L31/10A61L31/14A61L27/54A61L27/58A61L27/50A61L27/04A61L27/34A61L27/32A61L17/06C22C18/00C22C1/02C22C1/04
CPCA61L17/005A61L17/06A61L27/047A61L27/32A61L27/34A61L27/50A61L27/54A61L27/58A61L31/022A61L31/028A61L31/086A61L31/10A61L31/14A61L31/148A61L31/16A61L2300/216A61L2300/404A61L2300/42A61L2430/02A61L2430/12C22C1/02C22C1/0483C22C18/00
Inventor 郑玉峰郭晖杨宏韬袁威曲新华戴尅戎
Owner PEKING UNIV
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