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个人信息Personal Information
教授 博士生导师
招生学科专业:
化学 -- 【招收硕士研究生】 -- 材料科学与技术学院
材料科学与工程 -- 【招收博士、硕士研究生】 -- 材料科学与技术学院
机械 -- 【招收博士、硕士研究生】 -- 材料科学与技术学院
材料与化工 -- 【招收博士、硕士研究生】 -- 材料科学与技术学院
主要任职:面向苛刻环境的材料制备与防护技术工业和信息化部重点实验室主任
其他任职:江苏省金属学会副理事长,江苏省热处理及表面改性工程技术研究中心副主任,江苏省机械工程学会材料工程专业委员会副理事长,江苏省复合材料学会常务理事
毕业院校:南京航空航天大学
学历:南京航空航天大学
学位:工学博士学位
所在单位:材料科学与技术学院
办公地点:江宁校区东区D10-材料楼A511
联系方式:13951818597
电子邮箱:
Al2O3 nanoparticles reinforced Fe-Al laser cladding coatings with enhanced mechanical properties
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所属单位:材料科学与技术学院
发表刊物:JOURNAL OF ALLOYS AND COMPOUNDS
关键字:Laser cladding In-situ grown Al2O3 nanoparticles Calcination treatment Al2O3/Fe-Al composite coating Toughening modification
摘要:A novel method is developed to fabricate an Al2O3/Fe-Al composite coating on 1045 steel with excellent mechanical properties and wear resistance. Proper thermal treatment of the ball-milling Fe-Al powder is essential to achieve in-situ assembled Al2O3 nanoparticles, which plays a pivotal role in the mechanical properties of the coating obtained by a subsequent laser cladding process. Systematic studies show that the in-situ grown Al2O3 nanoparticles with a diameter of 50-100 nm assembling on the Fe-Al powder is fabricated by thermal treating the ball-milling Fe-Al powder at 850 degrees C for 2 h under 0.1 Pa vacuum atmosphere. This kind of metal feedstock is important to achieve a uniform Al2O3 nanoparticles reinforced Fe3Al laser cladding coating, with minimum lattice misfit and high thermodynamic stability characteristics. The in-situ grown Al2O3 nanoparticles with proper sizes in the laser cladding coating refine the solidified microstructure and inhibit the growth of cracks, resulting in not only the enhancement of hardness and toughness, but also a lower specific wear rate of 0.1811 x 10(-3) mm(3) N-1 center dot m(-1) in the dry sliding test. (C) 2018 Elsevier B.V. All rights reserved.
ISSN号:0925-8388
是否译文:否
发表时间:2018-07-30
合写作者:Luo, Xixi,张平则,顾冬冬
通讯作者:姚正军