High-efficiency “green” aluminizing process for high-temperature alloy blades has been successfully developed

【ALUMINIUM CHINA NETWORK】 Recently, Prof. Shen Mingli, a researcher of the High Temperature Protective Coatings Group of the Shenyang Institute of Metals, Chinese Academy of Sciences, recently developed a subversion of the traditional “green” aluminizing technology, enabling the preparation of advanced aluminide coatings to be as nontoxic as a vacuum coating. Emissions, no harmful element doping requirements, coating anti-oxidation performance is superior to ordinary aluminide coatings.

It is reported that high-performance thermal diffusion aluminide coatings, including platinum modification, active element modified aluminide coating, etc., are one of the main methods for high-temperature corrosion protection of advanced aero-engine and gas turbine turbine blades. However, in the traditional powder-embedding, slurry-diffusion, and gas-phase heat-diffusing aluminide coating preparation techniques, there are stubborn ills of coating harmful element doping and toxic gas release. In response to the above problems, the “green” aluminizing technology developed by the research group is based on the effect of vacuum high-density aluminum plasma irradiation, and it can achieve no harmful effects by enhancing the diffusion mechanism of high-density aluminum ion deposition, injection, sputtering, and irradiation. Highly efficient, controllable, non-toxic gas emissions from element-doped high-performance aluminide coatings.