Porous membrane with TiN coating and preparation method thereof
A porous film and coating technology, applied in the field of porous Ti and its preparation, porous materials and its preparation, can solve the problem that the wear resistance and corrosion resistance coating on the porous Ti hole surface cannot be achieved, and the TiN coating cannot achieve continuous, Compact structure, insignificant corrosion resistance effect, etc., to achieve the effect of low raw material cost, good product quality controllability, and narrow pore size distribution range
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Embodiment 1
[0016] The porous membrane with TiN coating of the present embodiment is prepared by the following method:
[0017] The first step: Ti powder and TiH2 powder are used. The purity of Ti and TiH2 powder is greater than 99.6%, and the average size is 40 and 33 μm respectively.
[0018] The second step: powder weighing and mixing
[0019] The raw materials are weighed according to 1wt% TiH2 powder, and the rest is Ti powder. Put the weighed powder into a ball mill and mix it for 4 hours, take it out and pour it into a mold, and use the compression molding method to press it into a square sheet of 30×30×5mm under a pressure of 120MP, with a relative density of about 63%.
[0020] Step Three: Warm Up
[0021] Slowly heat the compact in a vacuum furnace to 300°C for preheating, and keep it warm for 0.5 hours.
[0022] Step 4: Nitrogen plasma beam scanning heating process preparation
[0023] Turn on the power, water, and gas switches of the plasma equipment, first turn on the hig...
Embodiment 2
[0032] The difference from Example 1 is that the raw materials are weighed according to 2wt% TiH2 powder, the rest is Ti powder, the plasma beam current is 90A, the plasma beam scanning speed is 3mm / s, the average size of the pores of the porous film is 46 μm, and finally the pores of the porous film are obtained. The rate is 45%.
[0033] The main process parameters and related properties of the samples are shown in Table 2.
[0034] Table 2.
[0035] TiH2 (wt%)
[0036] The relative density of the compact is about (%)
Embodiment 3
[0038] The difference from Example 1 is that the raw materials are weighed according to 3wt% TiH2 powder, and the rest is Ti powder. h, the plasma beam scanning speed is 2mm / s, the average size of pores in the porous membrane is 53μm, and the porosity of the porous membrane is 47%. The main process parameters and related properties of the samples are shown in Table 3.
[0039] table 3.
[0040] TiH2 (wt%)
[0041] Hole surface nitride layer thickness (μm)
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