CAJ | 학술논문

　　采用超声复合原位合成技术制备 TiAl3/7075复合材料，建立在超声处理情况下的动力学模型，并进行数值计算。计算表明，与未超声处理相比较，反应时间大幅度缩短。分析影响反应速率的因素，结果表明：在超声波作用下，获得颗粒状的 TiAl3相且弥散分布；超声作用增大 Al 原子的扩散系数、减小边界层的厚度及 Ti 颗粒的大小，以致加快反应速度。
　　채용초성복합원위합성기술제비 TiAl3/7075복합재료，건립재초성처리정황하적동역학모형，병진행수치계산。계산표명，여미초성처리상비교，반응시간대폭도축단。분석영향반응속솔적인소，결과표명：재초성파작용하，획득과립상적 TiAl3상차미산분포；초성작용증대 Al 원자적확산계수、감소변계층적후도급 Ti 과립적대소，이치가쾌반응속도。
TiAl3/7075 composites were fabricated by in situ synthesis via ultrasonic treatment. A kinetic model of the reaction process acted by ultrasonic wave was built with mathematical calculation. The calculations show that the reaction time comparing with that of no ultrasonic treatment is greatly reduced. Some influencing factors on the reaction rate were analyzed. The results show that granular TiAl3 phases present in the composites and distribute homogeneously. Ultrasonic oscillation can increase the diffusion coefficient of aluminium atom,decrease the thickness of boundary layer and the size of titanium particle,all these accelerates the velocity of reaction.