Method for preparing hollow fiber multiporous biological titanium material
A bio-titanium and fiber technology, applied in the field of bioengineering, can solve the problems that the pore density and uniformity are not easy to precisely control, the process is complicated, and the manufacturing cost is high. The effect of stress shielding
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Embodiment 1
[0025] The TA9 titanium alloy fiber with a specification of φ0.08mm is randomly wound on a dense mandrel with a diameter of about 8.0mm, and shaped. Put the mandrel with 20g of titanium alloy fiber wound on the surface into a steel mold with an inner diameter of 20mm, compact it with a hollow pressure head with an inner diameter equal to the diameter of the compact mandrel at a pressure of 0.3T, hold the load for 10 seconds, remove the mold and Mandrel, the porous titanium rod or column compacted into green body is sintered under vacuum (vacuum degree is 2×10 -3 Pa), sintering temperature range: 1200°C, sintering time: 6 hours. After sintering, the hollow fiber porous bio-titanium material is obtained, the porosity is 76.6%, and the connectivity of the pore phase is good.
Embodiment 2
[0027] The TA9 titanium alloy fiber with a specification of φ0.08mm is randomly wound on a dense mandrel with a diameter of about 8.0mm, and shaped. Put the mandrel with 20g of titanium alloy fiber wound on the surface into a steel mold with an inner diameter of 20mm, use a hollow indenter with an inner diameter equal to the diameter of the compact mandrel to compact it at a pressure of 0.6T, hold the load for 15 seconds, remove the mold and Mandrel, the porous titanium rod or column compacted into green body is sintered under vacuum (vacuum degree is 2×10 -3 Pa), sintering temperature range: 1250°C, sintering time: 3 hours. After sintering, a hollow fiber porous bio-titanium material is obtained, with a porosity of 47.3%.
Embodiment 3
[0029] The TA0 pure titanium fiber with a specification of φ0.15mm is randomly wound on a dense mandrel with a diameter of about 8.0mm, and shaped. Put the mandrel with 25g of pure titanium fiber wound on the surface into a steel mold with an inner diameter of 20mm, compact it with a hollow pressure head with an inner diameter equal to the diameter of the compact mandrel at a pressure of 0.6T, hold the load for 10 seconds, remove the mold and Mandrel, the porous titanium rod or column compacted into green body is sintered under vacuum (vacuum degree is 2×10 -3 Pa), sintering temperature range: 1200°C, sintering time: 2 hours. After sintering, a hollow fiber porous bio-titanium material is obtained, with a porosity of 52.0%.
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