Study On Thermal Performance Of Al-Ce And Al-Mg-Ce Alloy Fuels

Al-based alloy fuels are the potential highly reactive metal fuels, their thermal performance are usually better than that common aluminum powder fuels. Al-Ce binary and Al-Mg-Ce ternary alloy fuels were prepared by melting method in this paper. And the influence of alloy elements on thermal performance of Al-based alloy fuels were analyzed.Based on the high activity and low ignition temperature properties of rare earth element Ce, alloying additions on Al and Ce have been used to prepare Al-Ce binary alloy fuels with the content of Ce is 1%, 3% and 5%. And the influence of alloys with different colling rate on the performance of alloy fuels were analyzed. The synthesized alloy fuels were characterized by XRD, TG-DTA and optical microscope. The results show that the main phase in the Al-Ce alloys are ?-Al,little amount of Ce is solid solution in the ?-Al.The oxidation of all alloy powders proceed in only one step, and Al-1Ce alloy powders behave best activity. The oxidation reaction started temperature of the rapid cooling Al-Ce alloy is lower than cooling in the furnace, and the grain of alloy is elaborated obviously.The oxidation reaction of Al-1Ce alloy powders are still incomplete at 1300?.Due to Al-Ce binary alloy fuels did not achieve the expected high-reactive,Al-Mg-Ce ternary alloy fuels are prepared by melting method for high-reactive. 16 groups of mass fraction with Mg's content are 5%, 10%, 15%, 20% and Ce's content are 0%, 1%,3%, 5% of Al-based alloy fuels were prepared respectively by rapid cooling method. The synthesized alloy fuels were characterized by XRD, TG-DTA and optical microscope. By characterizing Al-xMg-1Ce(x=5,10,15,20)and Al-15Mg-yCe(y=0,1,3,5)the influence of alloy fuels with different content of Mg and Ce on thermal performance of alloy fuels were analyzed. The results show that the oxidation of Mg's content with 5% and 10% in Al-xMg-1Ce series alloys proceed in only one step, and the oxidation proceed in two steps when the Mg's content increase to 15% and 20%. The heat enthalpy of Al-xMg-1Ce alloypowders increased and then decreased with increasing of Mg content. Al-15Mg-1Ce alloy powders show better thermal performance with the largest heat enthalpy. The oxidation of Al-15Mg-Ce series alloys proceed in two steps, the first oxidation reaction temperature of Al-15Mg-Ce alloy powders is about 160? lower than Al-15 Mg alloy powders. The heat enthalpy of Al-15Mg-yCe alloy powders first increased and then decreased last kept flat with the increasing of Ce content from 0% to 5%. Al-15Mg-1Ce alloy powders behave better thermal performance with the heat enthalpy of 6413uV?s/mg and weight increasing90% at 1300? among them.