Method for preparing implantable foam titanium with buffer energy-absorbing characteristic

Abstract

The invention discloses a method for preparing implantable foam titanium with a buffer energy-absorbing characteristic. The method comprises the following steps: S1, uniformly mixing high-purity titanium powder with granular urea according to a certain mass fraction ratio; S2, loading a mixture obtained in step S1 into a steel mold, and pressing the mixture by utilizing a sample press to obtain agreen compact; and S3, putting the green compact obtained in step S2 into a vacuum carbon tube furnace for sintering, wherein the sintering process comprises a low-temperature vacuum urea removing procedure and a high-temperature solid-state sintering procedure; during the low-temperature vacuum urea removing procedure, the sintering operation is performed for a certain time under the circumstancethat the vacuum degree in the vacuum carbon tube furnace is controlled at 1 x 10<-1> Pa to 1 x 10<-3> Pa; then, the high-temperature solid-state sintering procedure is initiated, and the sintering protection operation is performed for a certain time in an atmospheric protective gas environment; and then, obtained foam titanium is taken out after the vacuum carbon tube furnace is cooled to room temperature. According to the method, foam titanium of which the interspace is uniform, the porosity is stable and adjustable, and the performance is excellent can be produced in batches, and the environmental pollution can be avoided.

Description

technical field [0001] The invention relates to the technical field of metal foam materials, in particular to an implantable titanium foam preparation method with cushioning and energy-absorbing properties. Background technique [0002] Titanium has the advantages of high melting point, high hardness, strong plasticity, low density, high specific strength, good corrosion resistance, high temperature resistance and welding performance, and excellent biocompatibility. Therefore, after the 1940s, titanium and Its compounds are widely used in aircraft, rockets, missiles, artificial satellites, spacecraft, ships, military, medical and petrochemical industries. The foaming of metal materials endows it with more excellent properties. In addition to low density, good corrosion resistance, good biocompatibility and high specific strength, titanium foam also has excellent properties such as light weight and good cushioning and energy absorption. performance. [0003] Now titanium fo...

AI Technical Summary

Problems solved by technology

This preparation method of foamed titanium provides a new idea for the preparation of foamed titanium that has both biomedical implant properties and energy-absorbing properties, and solves the problem of relatively single preparation performance and inability to batch titanium foams in the prior art. Produce foamed titanium with uniform voids, stable and adjustable porosity, excellent performance, and the technical problems of environmental pollution, while improving the adaptability of foamed titanium in the market to meet wider use needs

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