摘要
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。
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.
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
2013年第3期29-32,共4页
Ordnance Material Science and Engineering
基金
国家自然科学基金(51165032)
江西省高等学校科技创新团队计划资助项目(00008713)
