Research on Incorporation Process by Electromagnetic Melt Stirring Based on Interface Control with Ultrasound

本研究的目标是开发金属矩阵复合材料的新颖生产方法，在精细陶瓷颗粒中快速转移到熔化的金属中，并在增强的矩阵中均匀分散，基于超声波的界面控制。超声波振动、金属粉末添加剂和电磁触发器被应用为主要技术，以解决熔体触发过程中的主要差异。从某种意义上说，它们有助于提高表面的湿度，以及固体过程中的外热反应，以实现铝化和矩阵的微观结构。在熔化铝合金表面上添加Al_2O_3或SiO_2粒子，对粒子转移进行基本数据的校准和in situ forms of reinforcements were examined in electromagnetic melt stirring。遵循基本知识，需要开发一种新颖的液体MMC处理方法，通过目前的研究得到了明确的：（1）建立粒子转让 ... More 将模型转化为熔化矩阵金属和初级晶体管阶段：关于物理和块状粒子的转移模型的理论和实验研究。（2）基于超声波振动的界面控制的基本注入过程的评估：改进处理期和粒子分散矩阵中的局部湿润性的影响。冷却率对固体基质微结构和颗粒冲出的影响。（3）超声波振动对与外金属形成（杂交）的影响：基质中基质中基质间金属晶体的数量和维度的影响。Al_2O_3和/或MgAl_2O_4 phase through the addition of SiO_2 particles on molten Al-Mg？y。（4）固体相位部分在泥浆中粒子转移中的影响：固体相位部分在复合泥浆中的作用，电磁旋转速度中粒子转移的影响。冷却率对初级水晶素和颗粒分散的精炼的影响。Less（低）

This research aims at developing a novel production method of metal matrix composites, in which fine ceramic particles are rapidly transferred into molten metal and uniformly dispersed in strengthened matrix, based on the interface control with ultrasound. Ultrasonic vibration, metal powder addition and electromagnetic stirring are applied as principal technologies to dissolve the main difficulties in melt stirring process. Consequently, they contribute to improve the apparent wettability, the exothermic reaction due to aluminide formation and the microstructure of matrix during solidification. With addition of Al_2O_3 or SiO_2 particles on a molten Al alloy surface, fundamental data regarding the particle transfer and the. in situ formation of reinforcements were examined in electromagnetic melt stirring. Following elemental knowledges, which are required to develop the novel liquid processing of MMC, were clarified through the present research :(1) Establishment of particle transfer … More models into molten matrix metal and primary crystalline phase :・Theoretical and experimental studies on the transfer models with spherical and blocky particles to molten metal and primary crystalline phase.(2) Evaluation of fundamental incorporation process based on interface control with ultrasonic vibration :・Effects of improved apparent wettability on the processing period and the particle dispersion in matrix.・Effect of cooling rate on the solidified matrix microstructure and the particle punching-out by primary crystalline.(3) Influence of ultrasonic vibration on the intermetallic formation with exotherm (hybridization) :・Effect of quantity and dimension of primary intermetallic crystallines on the particle dispersion in matrix.・Formation of Al_2O_3 and/or MgAl_2O_4 phase through the addition of SiO_2 particles on molten Al-Mg alloy.(4) Influence of solid phase fraction in slurry on the particle transfer in electromagnetic melt stirring :・Effect of solid phase fraction in composite slurry on the electromagnetically rotating speed.・Effect of cooling rate on the refinement of primary crystallines and the particle dispersion. Less