Talking about Liquid Plasma Spraying

       Generally speaking, the coating prepared by the thermal spraying system with solid powder feeding is composed of superimposed flat particles, which inevitably produces microscopic defects such as pores. We have mentioned the use of laser remelting to reduce coating porosity in previous articles, so are there other ways to try?

I remember meeting an overseas customer in the middle of last year and was asked about a thermal spraying process that can improve the compactness of the coating - liquid-phase plasma spraying. The process is to build a liquid-phase feeding system to replace the solid-state powder feeding system. After mixing fine powder and solvent that can prepare fine or nano-structured coatings, it is matched with a plasma thermal spraying system to prepare denser and more wear-resistant coatings. . Usually, when a solid powder feeder is used to spray fine powder with poor fluidity, a large flow of powder gas is required to send the powder to the center of the plasma flame, but this easily causes the plasma flame to fluctuate and form turbulent flow.

So, are there any disadvantages to liquid plasma spraying? There is no perfect man: the deposition efficiency of this process is not high, and the process is narrow, and it will take time for large-scale commercialization. Currently, it is mostly used in the preparation of high value-added coatings

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