Method for preparing nano-scale reproducible antibacterial medical porous titanium-magnesium skeleton material

Abstract

The invention relates to block-shaped nano-scale antibacterial medical porous titanium-magnesium skeleton material and a preparation method thereof and particularly relates to a method for preparing anano-scale producible antibacterial medical porous titanium-magnesium skeleton material through the combination of a high-pressure torsion method and a powder metallurgy method. The mass fraction ratio of magnesium to zinc to calcium to potassium to silver to silicon to phosphorus in the skeleton material is (12%-16%) to (0.1%-0.4%) to (2.5%-3.2%) to (0.5%-0.8%) to (0.8-1.4%) to (23%-27%) to (0.5%-1.3%), and the rest is metallic titanium. The method comprises the following steps: determining the weight of metal powder in a single torsion pressure process at 20g-500g; adjusting the following parameters in the torsion pressure process: the torsion torque of a torsion head is 800Nm-1500Nm, the rotation speed of the torsion head is 1r / min-5r / min, the single torsion pressure time is 10-30 minutes, and the torsion pressure number of times is 2-6; adding a proper amount of a 4% sodium hydroxide solution, and carrying out chemical corrosion for forming holes; and heating to 380-400 DEG C, andsintering. The material prepared by virtue of the method can be used as a medical skeleton material.

Description

technical field [0001] The invention relates to a method for preparing block nanoscale renewable antibacterial medical porous titanium-magnesium skeleton, in particular to a method for preparing nanoscale renewable antibacterial medical porous titanium-magnesium skeleton material by combining high-pressure torsion method and powder metallurgy method. By properly adjusting the rotation speed, torque, and twisting time and times of the indenter, a bulk nanoscale renewable antibacterial medical porous titanium-magnesium bone material with uniform grain refinement can be prepared. Background technique [0002] Titanium, chemical symbol Ti, atomic weight 47.867, specific gravity 4.506-4.516, melting point 1668±4°C. Titanium is a silver-white transition metal with good high temperature resistance, low temperature resistance, strong acid resistance, strong alkali resistance, high strength and low density, and its reserves rank tenth among all elements. It has a wide range of appli...

AI Technical Summary

Problems solved by technology

The existing processing technology prepares porous titanium by sintering, but the pore size and shape of the pores of the porous titanium prepared in this way cannot be controlled. What is produced is irregular pores with smooth pore walls, which reduces the strength and biocompatibility of titanium to varying degrees. degree and corrosion resistance

Porous titanium prepared by organic foam impregnation method has high porosity, but many pores are blocked, which reduces the biocompatibility of porous titanium

At present, the method of adding pore-forming agent materials can produce porous titanium with good performance in all aspects, but the selection of pore-forming agent materials is extremely strict.

[0004] Aiming at the problem that the performance of metal titanium needs to be improved and the performance of the currently prepared porous titanium is declining or the conditions are high, although the invention patent for manufacturing porous titanium has been proposed, it cannot be widely used in clinical medicine due to the limitation of geometric size and performance.

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