Preparation method of medical porous titanium and titanium alloy

A technology of titanium alloy and porous titanium is applied in the field of preparation of medical porous titanium and titanium alloy, and achieves the effects of excellent mechanical properties, high efficiency and low sintering temperature

Inactive Publication Date: 2012-10-24
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing medical porous titanium and titanium alloys, which solves the problem of preparing porous titanium and titanium alloys by microwave sintering at home and abroad so far.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: Preparation of medical porous pure titanium

[0020] (1) Powder blending: Titanium powder with a purity of 99.7% and ammonium bicarbonate with a mass ratio of 95% are blended at a mass ratio of 10:7, wherein the particle size of the titanium powder is 75 mesh, and the ammonium bicarbonate is 20-30 mesh;

[0021] (2) Ball milling: Put the prepared powder into a stainless steel ball mill tank for ballless powder mixing, wherein the ball milling speed is 100 r / min, and the ball milling time is 2 hours;

[0022] (3) Compact: the ball-milled powder is molded under a pressure of 300MPa to make a Φ11.5×22 billet;

[0023] (4) Furnace loading: Place the obtained billet and 100g of SiC microwave-assisted heating material in a polycrystalline mullite fiber insulation bucket, and then put the insulation bucket into the microwave sintering furnace;

[0024] (5) Microwave sintering: After the vacuum degree in the microwave sintering furnace cavity is evacuated to less t...

Embodiment 2

[0026] Example 2: Preparation of medical porous pure titanium

[0027] (1) Powder blending: titanium powder with a purity of 99.7% and titanium hydride powder with a purity of 99.7% are batched according to a mass ratio of 10: 7, and the particle diameters of the titanium powder and titanium hydride powder are both 325 mesh;

[0028] (2) Ball milling: Put the prepared powder into a stainless steel ball mill tank for ballless powder mixing, where the ball milling speed is 500 r / min, and the ball milling time is 8 hours;

[0029] (3) Compact: the ball-milled powder is molded under a pressure of 300MPa to make a Φ11.5×22 billet;

[0030] (4) Furnace loading: Place the obtained billet and 200g of SiC microwave-assisted heating material in a polycrystalline mullite fiber insulation bucket, and then put the insulation bucket into the microwave sintering furnace;

[0031] (5) Microwave sintering: After the vacuum degree in the furnace cavity is evacuated to less than 0.1 Pa, argon ...

Embodiment 3

[0033] Example 3: Preparation of medical porous Ti-6Al-4V alloy

[0034] (1) Mixing powder: titanium powder with a purity of 99.7%, aluminum powder with a purity of 99.8% and vanadium with a purity of 99.7%, and the weight percentage of titanium, aluminum and vanadium is 45:3:2, and the purity is 95%. 1. A urea pore-forming agent with a mass percentage of 25%, wherein the particle size of the titanium powder is 325 mesh, the aluminum powder is 500 mesh, and the vanadium powder is 700 mesh, and the particle size of the urea is 35-40 mesh;

[0035] (2) Ball milling: Put the prepared powder into a stainless steel ball milling tank for ball milling, wherein the ball milling speed is 200 r / min, and the ball milling time is 2 hours;

[0036] (3) Compact: the ball-milled powder is molded under a pressure of 300 MPa to make a Φ11.5×22 billet;

[0037] (4) Furnace loading: Place the obtained billet and 300g of SiC microwave-assisted heating material in a polycrystalline mullite fiber...

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Abstract

The invention discloses a preparation method of medical porous titanium and titanium alloy, which comprises the following steps: proportionally preparing titanium powder, alloy element powder and pore forming agent powder according to needs; carrying out ball milling, mixing and mechanical pressing by a powder metallurgy blank making technique to obtain a blank; putting the blank in a thermal insulation barrel, and putting the thermal insulation barrel into a microwave sintering furnace; and after vacuumizing the furnace chamber to a vacuum degree of 0.1Pa, charging argon with the purity of 99.999% to form cyclic protection, controlling the output power of the microwave sintering furnace at 0.5-3kW, heating to the sintering temperature of 800-1200 DEG C at the heating rate of 5-40 DEG C/minute, keeping the temperature for 5-30 minutes, shutting down the microwave source, and carrying out furnace cooling to obtain the medical porous titanium and titanium alloy. The invention has the advantages of simple preparation method, short sintering period, high efficiency, low sintering temperature and low energy consumption; and the sintered porous titanium and titanium alloy have excellent mechanical properties, and can be used as alternate repair material for bones, joints, artificial radix dentis and other hard tissues.

Description

technical field [0001] The invention relates to medical metal materials, in particular to a preparation method of medical porous titanium and titanium alloy. Background technique [0002] Compared with traditional stainless steel and cobalt-based alloys, medical titanium and its alloys are more and more widely used due to their low density, low modulus, high strength, excellent biocompatibility and corrosion resistance. Such as artificial joints (hip, knee, shoulder, ankle, elbow, wrist, knuckles, etc.), orthopedic trauma products (intramedullary nails, plates, screws, etc.), spinal orthopedic internal fixation systems, dental implants, dental trays, orthodontics Wire, artificial heart valve, interventional cardiovascular stent, etc. However, as hard tissue implants such as bones, joints and teeth as replacement or restoration materials, since the elastic modulus of titanium and titanium alloys is 60-110Gpa much larger than the elastic modulus of hard tissues of 3-20Gpa, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08C22C14/00A61L27/06A61L27/56
Inventor 刘爱辉徐吉林隋艳伟李年莲余中狄张广荣
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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