期刊
SURFACE & COATINGS TECHNOLOGY
卷 268, 期 -, 页码 230-240出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2014.11.059
关键词
Low-pressure cold spraying; Finite element method; Adiabatic shear localization
Thermodynamic aspects of low-pressure cold spraying process with air as a working gas were simulated using 1-D isentropic approximation and ANSYS Fluent CFD ver. 14.5 software. The simulation was completed with the help of Abagus CAE software, which was used to find out the parameters causing adiabatic shear instability. The critical velocity of spherical and dendritic copper particles was specified. The experimental verification of the simulation was realized using a self-built CCD camera-based diagnostic system with laser light illumination. Moreover, the experimental investigation of copper particles after impact onto substrate was realized with the use of scanning electron microscope (SEM). The carried investigation proofed the important difference in impact behaviour between dendritic and spherical powders. (C) 2014 Elsevier B.V. All rights reserved.
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