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Zn-Li-Mg-system zinc alloy and preparation method and application thereof

A zinc alloy and medical technology, which is applied in the field of Zn-Li-Mg zinc alloy and its preparation, can solve the problems of slow degradation, loss of mechanical integrity, toxic and side effects, etc., and achieve simplified composition, excellent mechanical properties, and excellent performance Effect

Inactive Publication Date: 2018-07-13
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The degradable metals that were initially studied were iron-based alloys. The disadvantages were that the degradation rate in the human body was too slow, and the degradation products had certain toxic and side effects on the human body. Therefore, magnesium-based alloys (such as AZ31, WE43, Mg-Ca, etc.) Gradually becoming a research hotspot
Despite the attractive application prospects of magnesium-based alloys as biomaterials, studies have found that magnesium-based alloys corrode too quickly, and implants can quickly lose their mechanical integrity before tissues and organs are adequately healed

Method used

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  • Zn-Li-Mg-system zinc alloy and preparation method and application thereof
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  • Zn-Li-Mg-system zinc alloy and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0069] Embodiment 1, preparation as-cast Zn-Li-Mg system zinc alloy

[0070] Using pure zinc (99.99wt.%), pure magnesium (99.9wt.%), and zinc-lithium intermetallic compounds as raw materials, according to the mass ratio in the following table:

[0071] Zn

[0072] mixed, in CO 2 +SF 6 Under the protection of atmosphere, smelt at 600 °C, stir evenly, and after standing, pouring and cooling, the cast Zn-Li-Mg zinc alloy (such as figure 1 shown).

Embodiment 2

[0073] Embodiment 2, preparation extruded state Zn-Li-Mg system zinc alloy

[0074] First, according to the steps in Example 1 of the present invention, the as-cast Zn-Li-Mg zinc alloy ingot is prepared, and then the Zn-Li-Mg zinc alloy bar is prepared by extrusion (such as figure 2 shown), using radial extrusion, ingot heat preservation for 2h, heat preservation temperature 260°C or 220°C, extrusion temperature 260°C or 220°C, extrusion ratio 36 or 16, extrusion speed 1mm / s to prepare the diameter 10mm Zn-Li-Mg system zinc alloy bar, that is, extruded Zn-Li-Mg system zinc alloy.

Embodiment 3

[0075] Embodiment 3, preparation rolling state Zn-Li-Mg system zinc alloy

[0076] First, according to the steps in Example 1 of the present invention, the as-cast Zn-Li-Mg zinc alloy ingot is prepared, and then the Zn-Li-Mg zinc alloy plate is prepared by rolling (such as image 3 shown), using unidirectional rolling, followed by hot rolling and finish rolling. The rolling reduction is 2%, that is, a rolled state Zn-Li-Mg zinc alloy of 1-3 mm can be obtained.

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Abstract

The invention discloses a Zn-Li-Mg-system zinc alloy and a preparation method and application thereof. The zinc alloy comprises, by weight, 0-1% of Li, 0-1% of Mg and the balance Zn, wherein the masspercents of Li and Mg are not zero. The zinc alloy prepared by the preparation method is excellent in mechanical performance, can provide long-term and effective supporting force in a body, has excellent cellular and blood compatibility, and can be applied to preparation of biomedical implants.

Description

technical field [0001] The invention relates to a Zn-Li-Mg series zinc alloy and its preparation method and application, belonging to the technical field of medical metal material preparation. Background technique [0002] Medical devices made of biomaterials will interact with organisms after being implanted in them. These functions can be used for auxiliary diagnosis, treatment or to help the repair and replacement of damaged tissues and organs of the organism. Obviously, depending on the purpose of implanting medical devices, the appropriate length of implantation time is also different: some devices are suitable for long-term existence in the body, so as to achieve the purpose of long-term service to promote curative effect; while some devices only need to be temporarily or short-term. Therefore, these devices need to be gradually degraded and absorbed during the repair or regeneration of biological tissues or organs. [0003] According to different purposes, biomateri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C18/00C22C1/02C22F1/16A61L31/14A61L31/02A61L27/58A61L27/04A61K6/04
CPCA61L27/047A61L27/58A61L31/022A61L31/148A61L2430/02A61K6/84C22C1/02C22C18/00C22F1/165
Inventor 郑玉峰张泽川杨宏韬沈丹妮
Owner PEKING UNIV
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