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Home > Archive>Volume 52, Issue 4, 2023 >1251-1258. DOI:10.12442/j.issn.1002-185X.20220526
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Wetting of MgO, TiO2 and Stainless Steel by Molten Al-8Si Binary Alloy at 1173 K
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Affiliation:

1.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China;2.School of Material Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China;3.School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, China

Fund Project:

National Key Research and Development Program (2018YFB2001800); National Natural Science Foundation of China (51961021, 52001152); Undergraduate Innovation and Entrepreneurship Training Program (DC2021011, DC2021018, DC2021036)

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    Abstract:

    The wettability and interface microstructures of Al-8Si/stainless steel, Al-8Si/MgO, and Al-8Si/TiO2 systems were investigated by a modified sessile drop method. The formation of interface products of three systems was discussed from the view of thermodynamics. Results show that the interface microstructure of Al-8Si/stainless steel is composed of Fe(Al,Si)3, Al7.2Fe1.8Si and Fe2Al5 phases, while that of Al-8Si/MgO and Al-8Si/TiO2 systems consists mainly of the Al2O3 phase with different morphologies and roughness. The wettability results indicate that the Al-8Si/MgO system exhibits a better non-wettability compared with the stainless steel and TiO2 substrates, whose equilibrium wetting angle is 124°. The wettability differences of the three systems are mainly related to the roughness and properties of interface products. The interface roughness tests show that the interface of Al-8Si/MgO system has the largest roughness of 1.46 μm, which is mainly due to the evaporation of Mg that destroys the morphology of the interface reaction layer during the interface reaction process. Furthermore, the existence of Ti promotes the interface reaction and increases the thickness of interface reaction layer and thus reduces the equilibrium wetting angle of Al-8Si/TiO2 system.

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[Bi Guangli, Qi Jiachen, Jiang Jing, Lin Qiaoli, Li Yuandong, Chen Tijun, Ma Ying, Guan Renguo.Wetting of MgO, TiO2 and Stainless Steel by Molten Al-8Si Binary Alloy at 1173 K[J]. Rare Metal Materials and Engineering,2023,52(4):1251~1258.]
DOI：10.12442/j. issn.1002-185X.20220526

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History
  • Received:June 17,2022
  • Revised:September 02,2022
  • Adopted:September 19,2022
  • Online: April 28,2023
  • Published: April 25,2023

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