An intragranular-intergranular composite-enhanced bio-zinc alloy

A composite reinforcement and bio-zinc technology, applied in tissue regeneration, process efficiency improvement, prosthesis, etc., can solve the problems of poor mechanical properties of bio-zinc alloys and achieve the effect of improving mechanical properties

Inactive Publication Date: 2020-02-18
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem of poor mechanical properties of existing biological zinc alloys, the present invention provides a biological zinc alloy with intragranular-intergranular composite reinforcement and a preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]Weigh respectively 0.1 gram of graphene powder, 0.3 gram of nano-silicon carbide powder (with a particle diameter of 40-50 nanometers) and 9.6 grams of zinc powder (with a particle diameter of 40-60 microns) at a mass ratio of 1:3:96, and The material mass ratio is 15:1, the ball milling speed is 300r / min, and the ball milling time is 1h. Under the protection of liquid nitrogen, graphene and nano-silicon carbide powder are ball-milled at low temperature to obtain graphene-encapsulated nano-silicon carbide powder; zinc powder is added to the above graphite The mixed powder of the three was obtained by ball milling for 3 hours in the silicon carbide nano-encapsulated powder; using the above-mentioned mixed powder as raw material, the intragranular-intergranular composite enhanced bio Zinc alloy; the control laser power is 70W, the scan rate is 15mm / s, the spot diameter is 50μm, and the powder coating thickness is 0.1mm.

[0032] Microstructural tests found that a large num...

Embodiment 2

[0034] Take by weighing 0.15 gram graphene powder, 0.25 gram nano-silicon carbide powder (particle diameter is 40-50 nanometers) and 9.6 gram zinc powder (particle diameter is 40-60 micron) respectively by the mass ratio of 1.5:2.5:96, with ball The material mass ratio is 15:1, the ball milling speed is 300r / min, and the ball milling time is 1h. Under the protection of liquid nitrogen, graphene and nano-silicon carbide powder are ball-milled at low temperature to obtain graphene-encapsulated nano-silicon carbide powder; zinc powder is added to the above graphite The mixed powder of the three was obtained by ball milling for 3 hours in the silicon carbide nano-encapsulated powder; using the above-mentioned mixed powder as raw material, the intragranular-intergranular composite enhanced bio Zinc alloy; the control laser power is 70W, the scan rate is 15mm / s, the spot diameter is 50μm, and the powder coating thickness is 0.1mm.

[0035] The microstructure test found that there ar...

Embodiment 3

[0037] Weigh respectively 0.1 gram of graphene powder, 0.3 gram of nano-silicon carbide powder (with a particle diameter of 40-50 nanometers) and 9.6 grams of zinc powder (with a particle diameter of 40-60 microns) at a mass ratio of 1:3:96, and The material mass ratio is 15:1, the ball milling speed is 250r / min, and the ball milling time is 0.5h. Under the protection of liquid nitrogen, graphene and nano-silicon carbide powder are ball-milled at low temperature to obtain graphene-encapsulated nano-silicon carbide powder; zinc powder is added to the above-mentioned In the graphene-encapsulated nano-silicon carbide powder, continue ball milling for 2 hours to obtain a mixed powder of the three; using the above-mentioned mixed powder as a raw material, under a protective atmosphere, the selective laser melting process is used to prepare the intragranular-intergranular compound. Biological zinc alloy; the control laser power is 70W, the scan rate is 15mm / s, the spot diameter is 50...

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Abstract

The invention relates to a bio-zinc alloy strengthened by intra- and inter-crystal composites and a preparation method thereof, belonging to the technical field of design and preparation of biomaterials. The biological zinc alloy is composed of graphene, nano-silicon carbide and zinc matrix: the graphene encapsulates nano-silicon carbide particles in the shape of an onion, and at the same time, part of the graphene-encapsulated nano-silicon carbide particles engulfs into the zinc grain, while other The nano-silicon carbide particles segregate between the grains, so that the uniform distribution of the nano-ceramic particles in the zinc matrix and between the grains is realized. Its preparation method is batch cryogenic ball milling + selective laser melting. When the obtained product is used as an implant, it can well repair bone defects. The invention has reasonable component design, simple and controllable preparation process, and the obtained product has excellent performance.

Description

technical field [0001] The invention relates to a bio-zinc alloy strengthened by intergranular-intergranular compounding and a preparation method thereof, belonging to the technical field of biomaterial design and preparation. Background technique [0002] The standard electrode potential of zinc is between magnesium and iron, and it has a degradation rate suitable for the growth of human bone tissue, so it is considered to be a very potential bone repair material. In addition, zinc has good biocompatibility and can participate in many physiological processes of the human body. However, the mechanical properties of zinc, especially its poor strength and toughness, are still difficult to meet the requirements of bone defect repair, which greatly limits its application. Therefore, improving the mechanical properties of zinc has become an urgent problem to be solved when it is used in degradable bone implants. [0003] A large number of studies in recent years have shown that...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/105B22F9/04C22C1/05C22C18/00C22C1/10A61L27/02A61L27/04A61L27/08A61L27/50
CPCA61L27/025A61L27/047A61L27/08A61L27/50C22C1/05C22C18/00B22F9/04A61L2300/412A61L2430/02B22F2009/043B22F10/00B22F10/34B22F10/28B22F10/36Y02P10/25
Inventor 高成德帅词俊王丽
Owner CENT SOUTH UNIV
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