1173 K下Al-8Si二元合金对MgO、TiO_(2)和不锈钢的润湿作用(英文)  

Wetting of MgO,TiO_(2)and Stainless Steel by Molten Al-8Si Binary Alloy at 1173 K

作　　者：毕广利[1,2] 齐珈晨 姜静 林巧力[1,2] 李元东 陈体军[1,2] 马颖[1,2] 管仁国[3] Bi Guangli;Qi Jiachen;Jiang Jing;Lin Qiaoli;Li Yuandong;Chen Tijun;MaYing;Guan Renguo(State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals,Lanzhou University of Technology,Lanzhou 730050,China;School of Material Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China;School of Materials Science and Engineering,Dalian Jiaotong University,Dalian 116028,China)

机构地区：[1]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,甘肃兰州730050 [2]兰州理工大学材料科学与工程学院,兰州730050 [3]大连交通大学材料科学与工程学院,大连116028

出　　处：《稀有金属材料与工程》2023年第4期1251-1258,共8页Rare Metal Materials and Engineering

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

摘　　要：采用改良座滴法对Al-8Si/不锈钢、Al-8Si/MgO和Al-8Si/TiO_(2)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)、Al_(7.2)Fe_(1.8)Si和Fe_(2)Al_(5)相组成,而Al-8Si/MgO和Al-8Si/TiO_(2)体系的界面组织主要由不同形貌Al_(2)O_(3)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1.46μm,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/TiO_(2)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。The wettability and interface microstructures of Al-8Si/stainless steel,Al-8Si/MgO,and Al-8Si/TiO_(2)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),Al_(7.2)Fe_(1.8)Si and Fe_(2)Al_(5)phases,while that of Al-8Si/MgO and Al-8Si/TiO_(2)systems consists mainly of the Al_(2)O_(3)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 TiO_(2)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 1.46μm,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/TiO_(2)system.

关 键 词：Al-8Si合金 润湿性 2520不锈钢 TiO_(2) MGO 

分 类 号：TG142.71[一般工业技术—材料科学与工程]