Because the porous material has an open porous structure, which allows the growth of new bone cells and body fluids, and the Young's modulus of the porous material can be
adjusted to match the porosity of natural bone and improve its biomechanical compatibility. Porous titanium has attracted extensive attention in the medical community due to
its excellent biocompatibility and good corrosion resistance. At present, its preparation methods have the following categories:
1. Solid state sintering method
The methods mainly include metal accumulation sintering method, pore-forming agent addition method, slurry foaming sintering method, template method, combustion
synthesis method, etc.
1) The metal stacking sintering method is a method of sintering the stacked hollow spheres or powders at high temperature and forming metallurgical bonds through high
temperature diffusion to prepare porous metals. In addition, the wire winding method can also be used to form a blank and then sinter to prepare a porous material.
2) This method is to uniformly mix the pore-forming agent and titanium powder in a certain proportion, and then remove the pore-forming agent by heating or dissolving
before or after sintering to obtain a porous structure. The method has wide applicability, simple preparation process and uniform pore distribution.
3) The slurry foaming method uses metal powder as the raw material, and is prepared into a slurry by adding a foaming agent, etc., and then adding it to the mold for heating.
Porous metals can be obtained.
4) The template method can also be used to prepare porous titanium. Generally, sponge is used as template, titanium slurry is immersed in the template, and after drying, the
template is removed by heating, and finally porous titanium and its alloy are obtained by high temperature sintering.
2. Liquid solidification method
According to the different heating sources, it can be divided into electron beam heating forming method and laser engineering net forming method.
1) Electron beam processing
Electron beam processing is a special processing method that uses the thermal energy generated by the high power density electron beam to impact the workpiece to melt and
vaporize the material. This method is also one of the commonly used methods in rapid prototyping technology.
2) Laser engineering net shaping method
The laser engineering net shaping method is also a kind of rapid prototyping technology. This technology uses computer-aided design and rapid prototyping technology to
convert the three-dimensional solid model into plane information, and then generates the CNC machining code, which is finally transmitted to the control center and heats the
laser. The molten raw materials are stacked layer by layer to produce solid parts.
3. Metal deposition method
Metal deposition methods mainly include vacuum evaporation, electrodeposition, plasma spraying and reactive deposition, among which the most common deposition method
is plasma spraying. In general, plasma spraying has unique advantages in preparing thin films or coatings, and the method can also be used to process porous metals.
TopTiTech can provide the following services:
1. Material selection consultation, performance testing and customized production and maintenance of sintered metal filter materials.
2. Design, manufacture and budget of various filtration and separation system equipment.
3. Research and development of multi-functional filter materials.
We can provide the following products:
1. Powder metallurgy (stainless steel, titanium, copper, iron, aluminum, tungsten, molybdenum, superalloy, nickel and Monel, etc.) sintered porous and microporous filter materials (filter tube, filter disc, filter ring, filter element, filter cone, plates, strips, etc.) series.
2. Three-layer, five-layer, seven-layer and multi-layer metal sintered screen series. Can provide 800*1200mm composite screen.
3. Metal fiber sintered porous, microporous filter material and element series. Can provide 500*1000mm metal felt.
4. Design and manufacture of filters, filter presses, multi-filtration equipment and gas-liquid, gas-solid, liquid-solid separation, and gas distribution systems.
