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A kind of zn-li series zinc alloy and its preparation method and application

A zinc alloy, zn-li technology, used in prosthesis, surgery, medical science, etc.

Active Publication Date: 2019-01-22
PEKING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there are no literature and patent reports on the synthesis and properties of Zn-Li alloys at home and abroad, and it is proposed to use Zn-Li alloys as biodegradable biomedical materials.

Method used

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  • A kind of zn-li series zinc alloy and its preparation method and application
  • A kind of zn-li series zinc alloy and its preparation method and application
  • A kind of zn-li series zinc alloy and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Embodiment 1, preparation as-cast Zn-Li alloy

[0082] Using pure Zn (99.99wt.%) and pure Li (99.95wt.%) (purchased from Huludao Zinc Industry Co., Ltd.) as raw materials, according to different mass ratios (the mass ratios of Zn and Li are 99:1, 99.2 : 0.8, 99.4: 0.6, 99.5: 0.5, 99.65: 0.35, 99.7: 0.3, 99.75: 0.25, 99.8: 0.2, 99.85: 0.15, 99.9: 0.1) mixing, in CO 2 +SF 6 Under atmosphere protection, 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-Li alloy ingot (that is, the Zn-Li zinc alloy of the present invention, such as figure 1 shown), wherein, Zn-0.1Li means that the mass ratio of Zn to Li is 99.9:0.1, Zn-0.4Li means that the mass ratio of Zn to Li is 99.6:0.4, and Zn-0.8Li means that the mass ratio of Zn to Li is 99.6:0.8.

Embodiment 2

[0083] Embodiment 2, preparation extruded state Zn-Li series alloy

[0084] First, according to the steps in Example 1 of the present invention, the cast Zn-Li alloy ingot is prepared, and the Zn-Li alloy bar is prepared by extrusion (that is, the Zn-Li zinc alloy of the present invention, such as 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-Li alloy with a diameter of 10mm bar.

Embodiment 3

[0085] Embodiment 3, Zn-Li system zinc alloy microstructural analysis

[0086] The Zn-Li alloy rod in Example 2 of the present invention was prepared by wire cutting to prepare a φ10x1mm sample, which was sequentially ground 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.

[0087] image 3 It is the metallographic picture of Zn-Li zinc alloy, from image 3 It can be seen that after extrusion, the grains are fine, and the second phase is evenly distributed on the matrix. Figure 4 is the X-ray diffraction pattern, given by Figure 4 It can be seen that after the addition of Li, the crystal structure of pure zinc changes, and many new diffraction peaks appear with the ...

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Abstract

The invention discloses a Zn-Li series zinc alloy as well as a preparation method and application thereof. The Zn-Li series zinc alloy comprises Zn and Li; and based on weight percent, the mass percent content of the Li in the zinc alloy accounts for 0 to 30%, but not including 0. The preparation method of the Zn-Li series zinc alloy comprises the following steps: (1) mixing the Zn and the Li to obtain a mixture; (2) treating the mixture according to the following step a) or step b) and then cooling the mixture to obtain the zinc alloy: a) under the protection of a CO2 and SF6 atmosphere, carrying out smelting or sintering on the mixture; and b) under the protection of a vacuum atmosphere, dissolving hydrogen gas into the mixture and carrying out the smelting. The zinc alloy prepared by the preparation method disclosed by the invention has an excellent mechanical property and can provide a long-term effective supporting force in vivo; and the zinc alloy has excellent cellular compatibility, blood compatibility and tissue and organ compatibility and can be used for preparing biomedical implant materials.

Description

technical field [0001] The invention relates to a Zn-Li zinc alloy and its preparation method and application, belonging to the field of medical metal material preparation and technology. Background technique [0002] Biomedical materials currently used in clinical practice mainly include biomedical metal materials, inorganic materials, polymer materials, composite materials, and bionic materials. Biomedical metal materials are metals or alloys used as biomedical materials. These materials have high mechanical strength and fatigue resistance, and are the most widely used load-bearing implant materials in clinical practice. The application of this kind of material is very extensive, covering various aspects such as hard tissue, soft tissue, artificial organs and shell auxiliary equipment. In addition to requiring such materials to have good mechanical properties and related physical properties, excellent physiological corrosion resistance and biocompatibility are also necess...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C18/00C22C1/02A61L31/14A61L31/02A61L27/58A61L27/50A61L27/04A61L17/06
CPCA61L17/06A61L27/047A61L27/50A61L27/58A61L31/022A61L31/14A61L31/148C22C1/02C22C18/00
Inventor 郑玉峰杨宏韬李华芳曲新华戴尅戎
Owner PEKING UNIV
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