MODELING OF PARTICLES IMPACTING ON A RIGID SUBSTRATE UNDER PLASMA SPRAYING CONDITIONS

被引:88
作者
BERTAGNOLLI, M [1 ]
MARCHESE, M [1 ]
JACUCCI, G [1 ]
机构
[1] UNIV TRENT,COMP SCI ENGN LAB,I-38068 ROVERTO,ITALY
关键词
FINITE-ELEMENT METHOD; FLUID FLOW AND HEAT TRANSFER; MODELING; PARTICLE IMPACT AND SPLAT GEOMETRY;
D O I
10.1007/BF02648527
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Finite-element methods have been applied for the spreading process of a ceramic liquid droplet impacting on a flat cold surface under plasma spraying conditions, The goals of the present investigation are to predict the geometrical form of the splat as a function of process parameters, such as initial temperature and velocity, and to follow the thermal field developing in the droplet up to solidification. A nonlinear finite-element procedure has been extended to model the complex physical phenomena involved in the impact process. The dynamic motion of the viscous melt in the drops as constrained by elastic surface tensions and in interaction with the developing contact with the target has been coupled to transient thermal phenomena to account for the solidification of the material. A model is used to study the impact of spherical particles of liquid ceramic of given temperature and velocity on a flat, cool rigid surface. The deformation of the splat geometry as well as the evolution of the thermal field within the splat are followed up to the final state and require adaptive discretization techniques, The proposed model can be used to correlate flattening degrees with the initial process parameters.
引用
收藏
页码:41 / 49
页数:9
相关论文
共 33 条
[1]   TA PI-ANTA PEI [J].
ARGYRIS, J ;
STDOLTSINIS, J ;
FISCHER, H ;
WUSTENBERG, H .
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING, 1985, 51 (1-3) :289-362
[2]  
BERTAGNOLLI M, 1994, MATERIALS DESIGN TEC, V62, P199
[3]   COMPUTER-SIMULATION OF PLASMA-SPRAYED COATINGS .1. COATING DEPOSITION MODEL [J].
CIROLINI, S ;
HARDING, JH ;
JACUCCI, G .
SURFACE & COATINGS TECHNOLOGY, 1991, 48 (02) :137-145
[4]  
FANTASSI S, 1993, THERMAL SPRAY COATINGS: RESEARCH, DESIGN AND APPLICATIONS, P1
[5]  
FANTASSI S, 1992, THERMAL SPRAY : INTERNATIONAL ADVANCES IN COATINGS TECHNOLOGY, P755
[6]   PLASMA SPRAYING - AN OVERVIEW [J].
FAUCHAIS, P ;
GRIMAUD, A ;
VARDELLE, A ;
VARDELLE, M .
ANNALES DE PHYSIQUE, 1989, 14 (03) :261-310
[7]  
FINK JL, 1981, ANLCENRSD804 REP
[8]  
HARDING JH, 1993, COMMUNICATION
[9]  
HOUBEN JM, 1985, THERMAL SPRAY COATIN, P1
[10]  
HOUBEN JM, 1988, THESIS TU EINDHOVEN