Detonation spraying of copper: theoretical analysis and experimental studies

被引:18
作者
Batraev, Igor S. [1 ]
Ulianitsky, Vladimir Yu. [1 ]
Dudina, Dina V. [1 ,2 ,3 ]
机构
[1] Russian Acad Sci, Lavrentyev Inst Hydrodynam, Siberian Branch, Lavrentyev Ave 15, Novosibirsk 630090, Russia
[2] Novosibirsk State Univ, Pirogova Str 2, Novosibirsk 630090, Russia
[3] Russian Acad Sci, Inst Solid State Chem & Mechanochem, Siberian Branch, Kutateladze Str 18, Novosibirsk 630128, Russia
关键词
detonation spraying; copper; particle temperature; particle velocity; surface; morphology; GAS DETONATION;
D O I
10.1016/j.matpr.2017.09.006
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In this work, the spraying behavior of a copper powder in the Computer- Controlled Detonation Spraying (CCDS) process was studied both theoretically and experimentally. The dependences of the particle temperatures and velocities on the explosive charge were calculated for particles of copper 40 mu m in diameter for different O-2/C2H2 ratios (1.1; 1.5; 2.0; 2.5) and nitrogen and air as carrier gases using models and software previously developed at Lavrentyev Institute of Hydrodynamics SB RAS. The explosive charge was varied between 30 and 60% of the barrel volume. Calculations showed that the particle temperatures increase and the particle velocities decrease monotonously as the O-2/C2H2 ratio increases from 1.1 to 2.5 at a constant explosive charge when nitrogen is used as a carrier gas. It was shown that the choice of the carrier gas (nitrogen or air) significantly influences the temperature of the particles when spraying is conducted at a low O-2/C2H2 ratio. In this case, the particle velocities are also affected. For experiments, an electrolytic copper powder with an average size of 40 mu m was used. The morphological features of the deposits were such that could be well expected in the deposits formed by particles heated up to the calculated temperatures. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码:11346 / 11350
页数:5
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