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Titanium alloy / calcium pyrophosphate surface bio-composite material and preparation method thereof

A technology of calcium pyrophosphate and composite materials, applied in coatings, medical science, prostheses, etc., can solve the problems of limited, easy cracking of coatings, shedding bioceramics, etc., and achieve clean preparation process, appropriate strength, and sintering short time effect

Active Publication Date: 2015-08-26
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: in view of the problems that the bioceramic coating is easy to crack and fall off and the amount of bioceramic added in the mixed preparation is limited in the current process for improving the biological inertia of titanium alloy, the titanium alloy is used as the matrix, and the bioceramic is In the embedded body, zirconium is used as the activator and stabilizer of the ceramic layer, and the spark plasma sintering technology is used to provide a surface biocomposite material with high interfacial bonding strength and excellent biological activity and its preparation method

Method used

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  • Titanium alloy / calcium pyrophosphate surface bio-composite material and preparation method thereof
  • Titanium alloy / calcium pyrophosphate surface bio-composite material and preparation method thereof
  • Titanium alloy / calcium pyrophosphate surface bio-composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0031] (1) According to the mass percentage (wt%) of Ti 74%, Nb 13%, and Zr 13.0%, respectively weigh Ti, Nb, and Zr metal powders with a purity of 99.5%, 99.95%, and 99% and a particle size of 45 μm ; Calcium pyrophosphate mixed powder is weighed according to the mass percentage (wt%) of 15% Zr (99% purity, particle size 45 μm) and 85% calcium pyrophosphate (analytical pure with 96% purity).

[0032](2) Put the titanium, niobium and zirconium powder into a ball milling tank, the ball milling medium is stainless steel balls, the ball to material ratio is 4:1, vacuumize to 30Pa after sealing with alcohol, take it out after mechanical alloying for 6 hours, and then put it in a vacuum drying oven Dry at a temperature of 40°C to obtain titanium alloy mixed powder; put calcium pyrophosphate powder and titanium powder into a ball mill tank, the ball mill medium is stainless steel balls, the ball-to-material ratio is 4:1, and vacuumize to 30Pa after sealing with alcohol. After mixing...

Embodiment 2

[0036] (1) According to the mass percentage (wt%) of Ti 56%, Nb 35%, and Zr 9%, respectively weigh Ti, Nb, and Zr metal powders with a purity of 99.5%, 99.95%, and 99%, and a particle size of 25 μm ; Calcium pyrophosphate mixed powder is weighed according to the mass percentage (wt%) of Zr 10% (purity 99%, particle size 25 μm), calcium pyrophosphate 90% (purity 96% analytically pure).

[0037] (2) Put the titanium, niobium and zirconium powder into a ball mill tank, the ball mill medium is stainless steel balls, the ball to material ratio is 3:1, after sealing with alcohol, vacuumize to 20Pa, carry out mechanical alloying for 8 hours, take it out, and then put it in a vacuum drying oven Dry at 40°C to obtain titanium alloy mixed powder; put calcium pyrophosphate powder and titanium powder into a ball mill tank, the ball mill medium is stainless steel balls, the ball-to-material ratio is 3:1, and vacuumize to 20Pa after sealing with alcohol. Take it out after mixing the powder ...

Embodiment 3

[0041] (1) According to the mass percentage (wt%) of Ti 67%, Nb 29%, and Zr 4%, respectively weigh Ti, Nb, and Zr metal powders with a purity of 99.5%, 99.95%, and 99%, and a particle size of 30 μm ; Calcium pyrophosphate mixed powder is weighed according to the mass percentage (wt%) of Zr13% (99.5% purity, particle size 30 μm) and 87% calcium pyrophosphate (96% analytical purity).

[0042] (2) Put the titanium, niobium and zirconium powder into a ball milling tank, the ball milling medium is stainless steel balls, the ball to material ratio is 4:1, after sealing with alcohol, vacuumize to 25Pa, carry out mechanical alloying for 7 hours, take it out, and then put it in a vacuum drying oven Dry at a temperature of 40°C to obtain titanium alloy mixed powder; put calcium pyrophosphate powder and titanium powder into a ball mill tank, the ball mill medium is stainless steel balls, the ball-to-material ratio is 4:1, and vacuumize to 25Pa after sealing with alcohol. After powder mix...

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Abstract

The invention discloses a titanium alloy / calcium pyrophosphate surface bio-composite material and a preparation method thereof, and belongs to the field of biomedical materials. The surface composite material uses as titanium alloy as the matrix, and calcium pyrophosphate and zirconium as a bio-ceramic layer. The process comprises the steps of: subjecting the titanium, niobium and zirconium powder to mechanical alloying for 6-8h and drying to obtain a titanium alloy mixed powder; milling and mixing the calcium pyrophosphate with the zirconium powder for 1-2h and drying to obtain a mixed calcium pyrophosphate powder; and respectively filling the titanium alloy mixed powder and calcium pyrophosphate mixed powder into an upper layer and a lower layer of a graphite mold by means of an auxiliary device, compacting, and sintering in a plasma sintering furnace to obtain the titanium alloy / calcium pyrophosphate surface bio-composite material. The surface composite material prepared by the invention has good interface combination, suitable strength and excellent surface biological activity, reaches composite layer thickness of 10mm, and can be used in human hard tissue replacement and repair. The manufacturing process is clean, simple in process, low in cost, and easy to achieve industrialization production.

Description

technical field [0001] The invention relates to a titanium alloy / calcium pyrophosphate surface biocomposite material and a preparation method thereof, belonging to the field of biomedical materials. Background technique [0002] In the field of biomaterials, Ti-Nb-Zr alloys are non-toxic and low elastic modulus titanium alloys. This series of alloys have good mechanical properties and can be used as implant materials for human body to carry large parts. However, Biological activity is poor. Calcium pyrophosphate (CPP) bioceramics has similar composition and structure to human bone, and can be osseointegrated with bone tissue when implanted in the organism, so it has excellent biocompatibility. However, due to the poor mechanical properties of calcium pyrophosphate materials, they cannot be directly used as artificial replacement and repair materials for large parts. [0003] Combining the excellent biocompatibility of bioceramics with the excellent mechanical properties of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/32A61L27/30A61L27/50B22F3/16B22F7/02B22F1/00C22C14/00
Inventor 何正员张玉勤周荣蒋业华
Owner KUNMING UNIV OF SCI & TECH
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