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Composite Ti-HA material and its preparing process

A composite material and sintering equipment technology, applied in prosthetics, medical science, etc., can solve problems such as the non-reaction of HA and Ti, macro sintering, high sintering temperature, etc., and achieve the effect of good compactness and high strength

Inactive Publication Date: 2002-12-04
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the combination of strength and activity can be achieved by adopting the form of gradient transition, but this method requires a higher sintering temperature, and it is difficult to take into account the non-reaction of HA and Ti and macroscopic sintering at the same time.

Method used

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  • Composite Ti-HA material and its preparing process
  • Composite Ti-HA material and its preparing process
  • Composite Ti-HA material and its preparing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] 1. Take 4.8g of hydroxyapatite powder, 4.8g of titanium powder and 0.4g of water glass for powder mixing, put them into a powder mixer for mixing, after mixing evenly, bake in an oven at 100°C for 1 hour. Then weigh 4g of the above-mentioned mixed powder and put it into a φ24 graphite mold, compact it, put it into a spark plasma sintering equipment, evacuate to 4Pa, apply a pressure of 30MPa, heat up at a rate of 100°C / min, heat up to 870°C for 3min, and slowly Cool to room temperature and take out to obtain Ti / HA composite material, the performance test of which is shown in Table 1.

[0016] 2. Take 5.95g of hydroxyapatite powder, 3.55g of titanium powder and 0.5g of water glass for powder mixing, put them into a powder mixer for mixing, after mixing evenly, bake in an oven at 100°C for 1 hour. Then weigh 4g of the above-mentioned mixed powder and put it into a φ24 graphite mold, compact it, put it into a spark plasma sintering equipment, evacuate to 4Pa, apply a press...

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Abstract

A Ti / HA composition is prepared from HA (48-78 wt.%), Ti (18-48 wt.%) and water glass as passivating agent (4-5 wt.%) through mixing HA powder with Ti powder while adding water glass, baking, loadingin mould, putting in plasma discharge sintering furnace, vacuumizing, pressurizing to 20-30 MPa, heating to 800-950 deg.C at speed of 80-150 deg.C / min, and holding the temp for 2-10 min. Its advantages are high strnegth and compactness, and having bioactivity.

Description

technical field [0001] A Ti / HA composite material and a preparation method thereof belong to the technical field of sintering. Background technique [0002] Titanium and titanium alloys have been used as the main materials for bone implantation and repair due to their light weight, high strength, and certain biocompatibility. However, after the metal material is implanted into the human body, the long-term service in the body fluid environment leads to corrosion of the metal surface and even metal ions enter the body tissue to deteriorate the body tissue. One way to solve this problem is to modify the metal surface to produce a bioactive surface that can integrate well with human bone. Hydroxyapatite (Ca 10 (PO 4 ) 6 (OH) 2 Hereinafter referred to as HA), is the main component of human bone, is an excellent bone substitute. At present, plasma spraying HA coating on the surface of substrate Ti is mostly used. However, Ti and HA are two materials that do not wet each oth...

Claims

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Application Information

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IPC IPC(8): A61L27/12C04B35/447C04B35/46C04B35/64
Inventor 张国珍张光磊钟涛兴张久兴张东涛
Owner BEIJING UNIV OF TECH
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