| 毕广利,齐珈晨,姜静,林巧力,李元东,陈体军,马颖,管仁国.1173 K下Al-8Si二元合金对MgO、TiO2 和不锈钢的润湿作用[J].稀有金属材料与工程,2023,52(4):1251~1258.[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.] |
| 1173 K下Al-8Si二元合金对MgO、TiO2 和不锈钢的润湿作用 |
| 投稿时间：2022-06-17 修订日期：2022-09-02 |
| 中文关键词: Al-8Si合金 润湿性 2520不锈钢 TiO2 MgO |
| 基金项目:国家重点基础研究发展计划（No. 2018YFB2001800），国家自然科学基金项目（51961021, 52001152） |
| 中文摘要: |
| 采用改良座滴法对Al-8Si/不锈钢、Al-8Si/MgO和Al-8Si/TiO2体系的润湿性和界面组织进行了研究。从热力学角度讨论了3个体系界面反应产物的形成。结果表明，Al-8Si/不锈钢的界面组织由Fe(Al,Si)3、Al7.2Fe1.8Si和Fe2Al5相组成，而Al-8Si/MgO和Al-8Si/TiO2体系的界面组织主要由不同形貌Al2O3相组成。3种体系的润湿性测试结果表明，Al-8Si熔体在MgO上具有较好的非润湿性能，其平衡润湿角为124°。3种体系润湿性的差异主要与界面产物的性质和粗糙度有关。界面粗糙度测试结果表明，Al-8Si/MgO体系界面粗糙度最大，为1.46 μm，主要原因是界面反应过程中Mg的蒸发破坏了界面反应层的形貌，此外Ti的存在促进了Al-8Si/TiO2体系的界面反应，增加了界面反应层的厚度，降低了平衡润湿角。 |
| Wetting of MgO, TiO2 and Stainless Steel by Molten Al-8Si Binary Alloy at 1173 K |
| 英文关键词:Al-8Si alloy wettability 2520 stainless steel TiO2 MgO |
| 英文摘要: |
| 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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