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利用改良座滴法研究了高真空条件下熔融6061和4043铝合金在600~700℃分别与TC4钛合金的润湿行为。研究表明,Al/Ti体系属于典型的反应润湿,且铺展动力学可由反应产物控制模型描述,整个润湿过程分为先非线性铺展和后线性铺展2个阶段,即:铝合金中微量的Si元素在界面上产生了明显的富集并在界面上形成了富Si的Ti_7Al_5Si_(12);铺展过程中Ti_7Al_5Si_(12)的分解对应于非线性铺展阶段,Ti_7Al_5Si_(12)分解的同时伴随Al_3Ti形成,对应于线性铺展阶段;润湿过程中出现了明显的前驱膜并伴随着较好的最终润湿性。
The wetting behavior of molten 6061 and 4043 aluminum alloy at 600-700 ℃ and TC4 titanium alloy under high vacuum conditions was studied by the modified droplet method. The results show that the Al / Ti system belongs to the typical reaction wetting, and the spreading kinetics can be described by the reaction product control model. The whole wetting process is divided into two stages: non-linear spreading and post-linear spreading, namely: Si element enriched obviously at the interface and formed Si-rich Ti_7Al_5Si_ (12) at the interface. During the spreading, the decomposition of Ti_7Al_5Si_ (12) corresponds to the non-linear spreading stage. Ti_7Al_5Si_ (12) Formation, corresponding to the linear spreading phase; apparent precursor film appeared during the wetting process with good final wettability.