Al-15 Bi composite water-reactive materials were prepared by hot pressing sintering with mechanically mixed powder of Al and Bi as raw materials. The microstructure

water-reactive properties and reaction products of the materials were analyzed and characterized. The effects of temperature and KCl concentration on the reaction rate between Al-15 Bi and water were analyzed

meanwhile the water reaction mechanism of Al-15 Bi was explored

and the reaction model was established. The results indicate that the Al-Bi composite material with dense and uniform structure can be prepared at 550 ℃ and 40 MPa for 1 h. Bi in the material is distributed in a network at the interface of Al particles. The hydrogen production rate can be improved greatly by increasing the temperature. Al and Bi can form micro-galvanic cells in water

thereby promoting the reaction of Al and water.