1results about How to "Improve sintering driving force" patented technology

The application provides a method for aluminum alloy powder chlorination film breaking activation sintering densification, and relates to the technical field of aluminum alloy powder metallurgy.The method introduces trace stannous chloride into 7xxx series aluminum alloy powder, so that the stannous chloride is dispersed and attached to the surface of powder particles;in the subsequent sintering process, the stannous chloride reacts with the aluminum oxide film on the surface of the powder particles to generate volatile AlCl3, the oxidation film is changed from a continuous distribution state into several nanometer scale aluminum oxide particles, the atomic migration ability and sintering neck growth behavior between particles are enhanced, and pressureless efficient full densification sintering of the aluminum alloy powder is realized.The application solves the problem that the sintering densification of 7xxx series aluminum alloy powder is difficult due to the stability of the surface oxidation film, has simple process and simple operation, is low in cost and high in efficiency, can be used for preparing lightweight aluminum alloy structural materials with high density and high strength, and is beneficial to industrial large-scale production and application promotion.