Granule exposure on surface of aluminium based composite material enhanced by granules and post-processing method

A method of expose and post treatment of the external particles of Al base composites belongs to the domain of the technique of brazing composite. The present invention puts acid or alkali into water by a certain ratio. Wash the surface of the composites with cold water after erode in hot alkali, wash it in hot water, blow it until it is dry at last and the expose of the surface is finished; The sample should be put into the room of vapor deposition in vacuum as soon as it is exposed and plates Cu on the surface, and finish the post disposal of the surface of the composites. This invention makes it's true that expose the surface of Al base composites in different shapes, dimensions and particles. Control the expose of the surface of Al base composites by controlling the consistence of the erodent solution and the temperature and time of erosion. Improve the wettability of the filler metal on the surface of composites by deposit in gas.