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Author Yuan, Xiaojing ♦ Zha, Bailin ♦ Hou, Genliang ♦ Hou, Pingjun ♦ Jiang, Li ♦ Wang, Hangong
Source SpringerLink
Content type Text
Publisher Springer US
File Format PDF
Copyright Year ©2009
Language English
Subject Domain (in DDC) Technology ♦ Engineering & allied operations
Subject Keyword agglomerate particle ♦ deposition characteristics ♦ numerical simulation ♦ smooth particle hydrodynamics ♦ thermal spray ♦ Analytical Chemistry ♦ Operating Procedures, Materials Treatment ♦ Characterization and Evaluation of Materials ♦ Materials Science ♦ Tribology, Corrosion and Coatings ♦ Surfaces and Interfaces, Thin Films
Abstract A multiscale model was constructed for agglomerate metal particle deposition in a low-temperature high-velocity air fuel (LTHVAF) thermal spraying process using finite element analysis (FEA) and smoothed particle hydrodynamics (SPH). Here, the agglomerate particle impact on the substrate is simplified to three states. Then, the corresponding model is selected. The simulated results show that the temperature and velocity of agglomerate particle can affect the effective temperature and plastic strain in the contact interface for increasing particle energy. At the microscale, the deformation of the deposited particle might coarsen the coating surface to the extent that the critical velocity of the metal particle would decrease. It indicates that the agglomerate particle might splash when it impacts on the substrate. The transient melting can be ascertained at an angle in an approach to the achievement of intermetallics combined with the modeling of the particle penetrating into the substrate. In this process, the effective strain of an agglomerate particle at the nanoscale is less than that at microscale, but the surface area ratio at nanoscale is large. The uncompacted state of the agglomerate particle can lead to a turbulent force when the agglomerate particle deposits on the substrate, which can reduce the penetration performance of the particle. This behavior can decrease the stress-strain of substrate and cause the cracked particle to sparkle.
ISSN 10599630
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2009-05-14
Publisher Place Boston
e-ISSN 15441016
Journal Journal of Thermal Spray Technology
Volume Number 18
Issue Number 3
Page Count 10
Starting Page 411
Ending Page 420

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Source: SpringerLink