CAJ | 학술논문

通过分析铜铝颗粒表面铝与氧的反应，计算铜铝合金中铝的沉淀析出量、铝在铜基体中的扩散速率以及Al2 O3颗粒大小，研究了喷射沉积内氧化法制备CuAl2 O3复合材料中 Al2 O3的长大动力学行为。结果表明，在反应合成制备过程中，氧化铝颗粒长大动力学行为满足抛物线规律；铜铝合金表面铝与氧的反应是一种铝扩散控制型反应，该氧化铝颗粒的长大与铝在铜铝合金中的含量、扩散速率和所处位置(晶内、晶界)有关。计算得到的 Al2 O3颗粒大小与实际获得的氧化铝颗粒大小相吻合。
통과분석동려과립표면려여양적반응，계산동려합금중려적침정석출량、려재동기체중적확산속솔이급Al2 O3과립대소，연구료분사침적내양화법제비CuAl2 O3복합재료중 Al2 O3적장대동역학행위。결과표명，재반응합성제비과정중，양화려과립장대동역학행위만족포물선규률；동려합금표면려여양적반응시일충려확산공제형반응，해양화려과립적장대여려재동려합금중적함량、확산속솔화소처위치(정내、정계)유관。계산득도적 Al2 O3과립대소여실제획득적양화려과립대소상문합。
The growth kinetics behaviors of Al2 O3 particles in CuAl2 O3 composites prepared by spray deposition internal-oxidation method were investigated by analyzing the reaction of aluminum and oxygen on the surface of a copper- aluminum alloy and calculating the precipitation amount of aluminum in the copper-aluminum alloy, the diffusion rate of aluminum in copper matrix and the size of Al2 O3 particles.It is indicated that the growth kinetics of Al2 O3 particles in the spray deposition internal-oxidation process follows a parabolic law,the reaction of aluminum and oxygen on the surface of the copper-aluminum alloy is controlled by aluminum diffusion,and the growth of Al2 O3 particles is influenced by the content,diffusion rate and location (grains or grain bounda-ries)of aluminum in the copper-aluminum alloy.The calculated size of aluminum oxide particles agrees with the measured one.