Atomic structure revolution and excellent performance improvement of composites induced by laser ultrafine-nano technology

被引：34
作者：
Li, Jianing [1 ]
Su, Molin [1 ]
Li, Guanchao [2 ]
Liu, Liqiang [1 ]
机构：
[1] Shandong Jianzhu Univ, Sch Mat Sci & Engn, Fengming Rd 1000, Jinan 250101, Shandong, Peoples R China
[2] Tech Univ Clausthal, Fac Energy, D-38678 Clausthal Zellerfeld, Germany
来源：
COMPOSITES PART B-ENGINEERING | 2020年 / 185卷
关键词：
Metal-matrix composites (MMCs); Surface treatments; Powder processing; Laser melting deposition; Nanocomposites; HIGH-ENTROPY ALLOYS; AB-INITIO; MICROSTRUCTURE; TEMPERATURE; CORROSION; TITANIUM; RESISTANCE; TI; NANOCOMPOSITES; COATINGS;
D O I：
10.1016/j.compositesb.2020.107792
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Carbon nanotubes (CNTs) reinforced high-entropy alloy composites (HEACs) were fabricated on a TA2 titanium alloy by mean of a laser melting deposition (LMD) of the FeCoCrAlCu-(nano-SiB6)-(Ni/Ag-coated CNTs) mixed powders, noting that large quantities of the ultrafine nanocrystals (UNs) were formed, portion of them were able to obtain the enormous energy from laser beam, which were able to permeate into the original ordered atom arrangement due to the high diffusion rates and their ultrafine microstructure. In substance, partial UNs can destroy the balanced state of atoms, increasing significantly the free energy of the crystal boundaries. Such CNTs/UNs modified LMD composites showed the better corrosion/high-temperature oxidation resistance properties than those of the TA2 alloy. Identification of the synthetic UNs in such LMD HEACs, more importantly the UNs transition effect, contributes theoretical/experimental basis to upgrade the quality of the industrial light alloy.
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页数：6
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