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摘要: During the China's Tiangong-2 (TG-2) flight mission, the experiments of 18 kinds of material samples were conducted in space by using a Multiple Materials Processing Furnace (MMPF) mounted in the orbital module of the TG-2 space laboratory. After the experiments of 12 kinds of samples of the first and second batches were completed successfully, astronauts packed and brought them back to the ground by ShenzhouⅡ spacecraft. By studying processing and formation on semiconductor and optoelectronics materials, metal alloys and metastable materials, functional single-crystal, micro-and nano-composite materials encapsulated in sample ampoules both in space and on Earth, we expect to explore some physical and chemical processes and mechanism of the materials formation that are normally obscured and therefore are difficult to study quantitatively on the ground due to the gravity-induced convection, to obtain the processing and synthesis technology for preparing high quality materials, and lead to the improvement and development of materials processing techniques on Earth, and also develop the experiment device and comprehensive ability for materials experiment in microgravity environment. This report briefly introduces the main points of each research work and preliminary comparative analysis results of 12 samples carried out by scientists undertaking research task.Abstract: During the China's Tiangong-2 (TG-2) flight mission, the experiments of 18 kinds of material samples were conducted in space by using a Multiple Materials Processing Furnace (MMPF) mounted in the orbital module of the TG-2 space laboratory. After the experiments of 12 kinds of samples of the first and second batches were completed successfully, astronauts packed and brought them back to the ground by ShenzhouⅡ spacecraft. By studying processing and formation on semiconductor and optoelectronics materials, metal alloys and metastable materials, functional single-crystal, micro-and nano-composite materials encapsulated in sample ampoules both in space and on Earth, we expect to explore some physical and chemical processes and mechanism of the materials formation that are normally obscured and therefore are difficult to study quantitatively on the ground due to the gravity-induced convection, to obtain the processing and synthesis technology for preparing high quality materials, and lead to the improvement and development of materials processing techniques on Earth, and also develop the experiment device and comprehensive ability for materials experiment in microgravity environment. This report briefly introduces the main points of each research work and preliminary comparative analysis results of 12 samples carried out by scientists undertaking research task.
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Key words:
- Solidification /
- Crystal growth /
- Wetting /
- Microgravity /
- Tiangong-2 space laboratory
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[1] HOFMANN D C, ROBERTS S N. Microgravity metal processing:from undercooled liquids to bulk metallic glasses[J]. NPJ Microg., 2015, 1:15003 [2] XU Guisheng, YANG Danfeng, LIU Jinfeng, et al. The growth status of relaxor-based ferroelectric crystals and their development trends[J]. J. Adv. Dielect., 2014, 4:1450002 [3] LIU Ying, XU Guisheng, LIU Jinfeng, et al. Dielectric, piezoelectric properties of MnO2-doped (K0.5Na0.5) NbO3-0.05LiNbO3 crystal grown by flux-Bridgman method[J]. J. Alloys. Comp., 2014, 603:95-99 [4] REN Guohao, CHEN Xiaofeng, LI Huaying, et al. Nonuniformity of luminescence of φ300 mm CsI(Tl) scintillation crystals and its growth interface[J]. J. Syn. Cryst., 2015, 44(12):3375-3378 [5] WANG W L, LI Z Q, WEI B. Macrosegregation pattern and microstructure feature of ternary Fe-Sn-Si immiscible alloy solidified under free fall condition[J]. Acta Mater., 2011, 59:5482-5493 [6] JIANG H X, HE J, ZHAO J Z. Influence of electric current pulses on the solidification of Cu-Bi-Sn immiscible alloys[J]. Sci. Rep., 2015, 5:12680 [7] SUN Q, JIANG H X, ZHAO J Z, et al. Microstructure evolution during the liquid-liquid phase transformation of Al-Bi alloys under the effect of TiC particles[J]. Acta Mater., 2017, 129:321-330 [8] SUN Q, JIANG H X, ZHAO J Z, et al. Effect of TiC particles on the liquid-liquid decomposition of Al-Pb alloys[J]. Mater. Des., 2016, 91:361-367 [9] SUN Qian, JIANG Hongxiang, ZHAO Jiuzhou. Effect of micro-alloying element bi on solidification and microstructure of Al-Pb alloy[J]. Acta Metall. Sin., 2016, 52(4):497-504 [10] SCHWEIZER M, COBB S D, VOLZ M P, et al. Defect density characterization of detached-grown germanium crystals[J]. J. Cryst. Growth, 2002, 235:161 [11] NISHINAGA T, GE P, HUO C, et al. Melt growth of striation and etch pit free GaSb under microgravity[J]. J. Cryst. Growth, 1997, 174:96 [12] CUI Fangming, FENG Chude, XIE Rongjun, et al. Significant third-order optical nonlinearity enhancement of gold nanoparticle incorporated mesoporous silica thin films by magnetic field thermal treatment[J]. J. Mater. Chem., 2010, 20(38):8399-8404 -
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