Method for improving wave-absorbing performance of max phase material by pre-oxidation

Abstract

The application discloses a method for improving the wave-absorbing performance of a MAX phase material by using a pre-oxidation strategy and belongs to the technical field of wave-absorbing material preparation. The wave-absorbing performance of the MAX phase material is greatly improved by generating amorphous oxide and nano-oxide on the surface of the MAX phase material in situ through short-time pre-oxidation treatment. The treatment method is as follows: MAX powder passing through a 200-mesh screen is placed in a corundum crucible, pre-oxidation is carried out in a tubular resistance furnace with different heating temperatures for 10-60 min, and then the MAX powder is immediately taken out and air-cooled to room temperature in air. The method has the advantages of simple process, low cost, no harmful substances generated in the treatment process, green environmental protection, simple and rapid improvement of the wave-absorbing performance of the MAX phase, and the like. Meanwhile, the morphology of the MAX phase and the thickness of the surface oxide can be directly controlled by adjusting the holding temperature and time, so that the wave-absorbing performance can be adjusted.

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