Heterogeneous nucleation could be considered as a surface catalyzed nucleation process. It is known that Al3Ti phase in Al-Ti refiner is an effective catalytic substrate for solidification of alpha-Al. However, since the Al3Ti phase has a tetragonal D022 structure with lattice constants of a =0.3851 nm and c =0.8608 nm, different planes of Al3Ti phase have different lattice misfit between Al. Moreover, it is reported that the shape of Al3Ti in Al-Ti refiner is platelet and wide plane of the platelet has the relatively large lattice misfit between Al. Therefore, the dominant face of Al₃Ti platelets in Al-Ti refiner is not the best plane for heterogeneous nucleation. To overcome these shortcomings, in our previous studies, high-symmetry L1₂ modified (Al_1-xMe_x)₃Ti phases with a lattice constant of a =0.3927 nm for Me = Cu, a =0.393 nm for Me = Fe, a = 0.394 nm for Me = Ni were used as catalytic substrate. In this paper, the role of lattice misfit on heterogeneous nucleation of Al will be discussed.

非均相成核可以被认为是表面催化的成核过程。已知Al-Ti精制机中的Al 3 Ti相是用于固化α-Al的有效催化基质。然而，由于Al 3 Ti相具有晶格常数为a ＝ 0.3851nm和c ＝ 0.8608nm的四方D022结构，所以Al 3 Ti相的不同平面在Al之间具有不同的晶格失配。此外，据报道，Al-Ti精炼机中的Al 3 Ti的形状为薄片状，并且薄片的宽平面在Al之间晶格失配较大。因此，Al-Ti磨浆机中Al ₃ Ti血小板的主导面不是异质成核的最佳平面。为了克服这些缺点，在我们以前的研究中，对高对称L1 _2进行了改进（Al _1-x Me_X）_3个与的晶格常数的Ti相一个用于= 0.3927纳米我=铜，一个用于= 0.393纳米我=铁，一个 用于= 0.394纳米我=镍用作催化基材。在本文中，将讨论晶格失配对Al异质形核的作用。