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Biodegradable Mg-Zn-Ag layered composite material and preparation method thereof

A layered composite material and composite material technology are applied in the field of biodegradable Mg-Zn-Ag layered composite materials and their preparation, which can solve the problems of slow degradation, excessive corrosion, and high elastic modulus, and achieve good durability. , strong antibacterial properties, good mechanical properties and corrosion resistance

Inactive Publication Date: 2019-09-20
ZHUHAI INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] One of the embodiments of the present invention provides a biodegradable Mg-Zn-Ag layered composite material, which has an outer layer, a middle layer and an inner layer connected in sequence, the outer layer is a silver alloy, and the middle layer is Zinc alloy, the inner layer is a magnesium alloy, and the composite material includes the following components in volume percentage: 10-25% of the silver alloy, 20-35% of the zinc alloy, and the balance of the magnesium alloy. Solved the problems of excessive corrosion, slow degradation and high elastic modulus of a single metal material in the prior art

Method used

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  • Biodegradable Mg-Zn-Ag layered composite material and preparation method thereof
  • Biodegradable Mg-Zn-Ag layered composite material and preparation method thereof
  • Biodegradable Mg-Zn-Ag layered composite material and preparation method thereof

Examples

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Embodiment 1

[0068] This example provides a biodegradable Mg-Zn-Ag layered composite material, which has an outer layer, a middle layer and an inner layer connected in sequence, the outer layer is a silver alloy, and the middle layer is a zinc alloy. The inner layer is a magnesium alloy, and the composite material includes the following components in volume percentage:

[0069] 10-25% of the silver alloy,

[0070] 20-35% of the zinc alloy,

[0071] The balance is the magnesium alloy.

[0072] The composite material in this example has a total of 3-layer structure, namely the inner layer, the middle layer and the outer layer. The form of the 3-layer structure makes the composite material have a more complete functional level, and each layer in the composite material is made of alloy , Compared with pure metals, alloys have better performance and use effects. The elements used in each layer alloy of the composite material of the present application are Ca, Zr and Sr, and each layer alloy ...

Embodiment 2

[0074] This example provides a biodegradable Mg-Zn-Ag layered composite material, which has an outer layer, a middle layer and an inner layer connected in sequence, the outer layer is a silver alloy, and the middle layer is a zinc alloy. The inner layer is a magnesium alloy, and the composite material includes the following components in volume percentage:

[0075] The silver alloy is 10-25%, the zinc alloy is 20-35%, and the balance is the magnesium alloy.

[0076] Wherein, the silver alloy includes at least one alloying element in Ca, Zr and Sr, specifically:

[0077] Ca 0.1-3.5%, and / or Zr 0.1-1.5%, and / or Sr 0.1-5.0%, and the balance is Ag.

[0078] As a preferred version, the silver alloy comprises the following components in mass percent:

[0079] Ca 0.3-0.8%, Zr 0.3-0.8%, Sr 1.0-2.0%, and the balance is Ag.

[0080] Zinc alloys include at least one alloying element of Ca, Zr and Sr, specifically:

[0081] Ca 0.1-3.5%, and / or Zr 0.1-1.5%, and / or Sr 0.1-5.0%, and the ...

Embodiment 3

[0089] This example provides the preparation method of biodegradable Mg-Zn-Ag layered composite material, and the steps include:

[0090] After melting the zinc alloy, casting it into the silver alloy hollow round ingot to obtain a Zn-Ag composite material round ingot;

[0091] Processing the Zn-Ag composite ingot into a Zn-Ag hollow ingot;

[0092] After melting the magnesium alloy, casting it into the Zn-Ag hollow round ingot to obtain a Mg-Zn-Ag composite material round ingot;

[0093] The Mg-Zn-Ag composite ingot is hot-extruded and then annealed to obtain the biodegradable Mg-Zn-Ag layered composite material.

[0094] Process such as figure 1 as shown, figure 1 Among them, 1 is silver alloy round ingot, 2 is silver alloy hollow round ingot, 3 is Zn-Ag composite material round ingot, 4 is Zn-Ag composite material hollow round ingot, 5 is Mg-Zn-Ag layered composite material round Ingot 6 is an extruded Mg-Zn-Ag layered composite material.

[0095] Among them, the prepa...

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Abstract

An embodiment of the invention provides a biodegradable Mg-Zn-Ag layered composite material and a preparation method of the biodegradable Mg-Zn-Ag layered composite material. The composite material comprises an outer layer, a middle layer and an inner layer, wherein the outer layer, the middle layer and the inner layer are sequentially connected. The outer layer is a silver alloy, a zinc alloy serves as the middle layer, and the inner layer adopts a magnesium alloy. The composite material comprises the following components of, by volume percentage, 10-25% of the silver alloy, 20-35% of the zinc alloy and the balance of the magnesium alloy. The problems that in the prior art, a single metal material is too fast in corrosion, slow in degradation and too high in elasticity modulus are solved. The composite material is superior in biocompatibility and good in mechanical property and corrosion resistance, has a long-acting antibacterial function, and has an important application value in the field of medical implant materials. Another embodiment of the invention further provides the preparation method of the biodegradable Mg-Zn-Ag layered composite material.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a biodegradable Mg-Zn-Ag layered composite material and a preparation method thereof. Background technique [0002] At present, the common clinical medical implants are mainly made of inert metal materials such as stainless steel, nickel-titanium alloy, and cobalt-chromium alloy. After implanted into the human body, such metal materials will permanently exist as foreign bodies, which will produce toxic ion precipitation, Vascular intimal hyperplasia, local inflammatory response, mechanical stretch injury and stress shielding effect and other issues. In view of the above reasons, researchers have developed a biodegradable magnesium alloy, which has the following significant advantages: (1) Good biocompatibility. Magnesium ions released during the degradation process of magnesium alloys can not only supplement magnesium for normal physiological functions o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C5/06C22C18/00C22C23/00C22C1/02C22F1/14C22F1/16C22F1/06B32B15/01B32B37/06B32B37/10B32B37/14B32B38/18
CPCB32B15/01B32B37/06B32B37/10B32B37/14B32B38/1816B32B38/1858B32B2038/0048B32B2250/03B32B2307/7145B32B2307/7163B32B2535/00C22C1/02C22C5/06C22C18/00C22C23/00C22F1/06C22F1/14C22F1/165
Inventor 马国睿吴锋
Owner ZHUHAI INST OF ADVANCED TECH
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