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微重力为深入研究被地面重力掩盖的物理现象提供了难得的机遇。特别是,由于浮力对流得到抑制,同时非接触生长更易实现,空间微重力环境有助于制备组分均匀、低缺陷浓度的合金晶体。基于此,实践十号卫星材料科学项目重点关注如下议题:(1)高质量半导体三元合金晶体生长;(2)金属合金的凝固、缺陷控制及界面现象研究;(3)熔体润湿性及金属基复合材料的合成。卫星在轨期间,各科学实验将依托于温场精确、样品位置可控的空间多功能炉,依次有序开展。基于项目研究,不但有望在晶体生长机理方面形成新见解,还有助于改进地面材料制备工艺。
Microgravity provides a unique opportunity to further study the physical phenomena covered by ground gravity. In particular, as the buoyancy convection is suppressed and at the same time the non-contact growth is more easily achieved, the spatial microgravity environment contributes to the preparation of alloy crystals with uniform composition and low defect concentration. Based on this, Practice No. 10 Satellite Materials Science Program focuses on the following topics: (1) high-quality semiconductor ternary alloy crystal growth; (2) metal alloy solidification, defect control and interface phenomena; (3) melt wettability And metal matrix composites. During the orbit of satellites, all scientific experiments will rely on space temperature multi-purpose furnace with accurate temperature field and controlled sample position, which will be carried out in sequence. Based on the project research, not only is it expected to form new insights into the crystal growth mechanism, but it will also help to improve the preparation of ground materials.