Structure Formation Mechanisms during Solid Ti with Molten Al Interaction

International Conference on Advanced Materials and New Technologies in Modern Materials Science 2015

Gurevich, L.^1 ; Pronichev, D.^1 ; Trunov, M.^1

Materials Science Chr., Volgograd State Technical University, Lenin Avenue 28, Volgograd

400005, Russia^1

关键词: Chemical interactions;    Composite fabrication;    Interlayer formation;    Intermetallic composites;    New mechanisms;    Structure formations;    Thin layers;    Thin oxide interlayers;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/116/1/012011/pdf
DOI  :  10.1088/1757-899X/116/1/012011

来源: IOP

【 摘 要 】

The study discuses advantages and disadvantages of previously proposed mechanisms of the formation of structure between solid Ti and molten Al and presents a new mechanism based on the reviewed and experimental data. The previously proposed mechanisms were classified into three groups: mechanisms of precipitation, mechanisms of destruction and mechanisms of chemical interaction between intermetallics and melt. The reviewed mechanisms did not explain the formation of heterogeneous interlayer with globular aluminide particles and thin layers of pure Al, while the present study reveals variation in the solid Ti/molten Al reaction kinetics during various phases of laminated metal-intermetallic composite formation. The proposed mechanism considers formed during composite fabrication thin oxide interlayers between Ti and Al evolution and its impact on the intermetallic compound formation and explains the initial slow rate of intermetallic interlayer formation and its subsequent acceleration when the oxide foils are ruptured.