论文部分内容阅读
研究了使用微乳液法制备铝及铝合金共晶钎剂的纳米团簇微粒 .该方法操作方便 ,可人为控制粒径 ,而且体系热力学、动力学的特性稳定 .采用微乳液法制备纳米级的铝及铝合金共晶钎剂具有一定的可行性和实用性 .应用W /O微乳液法研究制备了在不同结晶条件下的KF AlF3 共晶产物 .应用差热分析法 (DTA)测定了不同结晶条件下一系列产物的熔点及特性 ,应用X 射线衍射仪 (XRD)确定了在各种条件下的产物组成 .实验结果表明 ,在反应过程中 ,温度控制在特定条件下有利于得到主结构为KAlF4 K3 AlF6的铝钎剂共晶材料 .应用微乳液法制备出的KAlF4 K3 AlF6共晶纳米微粒 ,X 衍射图谱证明其主相为KAlF4,次相为K3 AlF6.差热分析证明纳米晶的熔点为 5 60℃ .该材料为铝及铝合金钎焊过程应用的理想状态铝钎剂
The micro-emulsion method was used to prepare nanocluster particles of aluminum and aluminum alloy eutectic flux.The method is easy to operate and can control the particle size artificially and has the characteristics of thermodynamics and kinetics stable.The nanorods Aluminum and aluminum alloy eutectic flux have certain feasibility and practicability.WF microemulsion method was used to study the preparation of KF AlF3 eutectic product under different crystallization conditions.Differential thermal analysis (DTA) Crystallization conditions of a series of products melting point and characteristics of the application of X-ray diffraction (XRD) to determine the product composition in a variety of conditions.The experimental results show that in the reaction process, the temperature control under certain conditions conducive to get the main structure KAlF4 K3 AlF6 was prepared by microemulsion method. The XRD patterns of KAlF4 K3 AlF6 eutectic nanoparticles were KAlF4 and K3 AlF6 as the minor phase, and the thermal analysis showed that the nanocrystalline The melting point of 5 60 ° C. This material is ideal for aluminum and aluminum alloy brazing process applications Aluminum flux