Study of Splat Particle Temperature Distribution in Plasma Spray Forming

2011 ◽  
Vol 291-294 ◽  
pp. 509-512
Author(s):  
Zi Yu Zhao ◽  
Bi Bo Xia ◽  
Su Zhi Zhang ◽  
Li Wang
Keyword(s):  
Plasma Spray ◽  
Particle Temperature ◽  
Substrate Surface ◽  
Spray Forming ◽  
Contact Heat ◽  
Plasma Spray Forming ◽  
Carbon Steel Surface ◽  
Important Basis ◽  
Temperature Time

This paper studies the thermal interaction of Ni particle and Al particle setting in the carbon steel surface using ANSYS software by finite element numerical simulation. It highlights the temperature-time change of feature points that are at different locations of flattened particles and substrate, and micro-contact heat transfer of particle and substrate surface is also analyzed. The results help to study residual stress distribution of a splat particle in the plasma spray forming, which further provide an important basis for improving the quality of the coating.

Real-Time Simulation Measurement System for Transient Temperature of Impacting Droplet Based on the Virtual Instrument

2007 ◽  
Vol 26-28 ◽  
pp. 1015-1018
Author(s):  
L. Yang ◽  
Jian Cheng Fang ◽  
Zhi Yu Zhao ◽  
Y.Q. Gao
Keyword(s):  
Heat Transfer ◽  
Real Time ◽  
Plasma Spray ◽  
Measurement System ◽  
Spray Forming ◽  
Transient Temperature ◽  
Plasma Spray Forming ◽  
The Real ◽  
Molten Droplets

The quality of coatings is directly influenced by the flattening and solidification of many individual molten droplets in plasma spray forming, so many properties such as thermal, electrical, mechanical etc are strongly linked to the real contact between the “piled-up” splats. The research on the transient temperature of impacting droplets and the heat transfer between droplets and substrate plays an important role in improving the quality of coatings. Because of complexity and high cost of temperature measurement systems for molten droplet during flattening in plasma spray forming at present, this paper presents a new kind of simulation measurement system for transient temperature of spray droplets when impacting on substrate based on LabVIEW, which could display the real-time changes of the temperature by waveform graph. Finally, the experiments were carried out on Pb-Sn alloy molten droplets to reveal the close connection between the impacting droplets temperature changes and the coatings quality, and the heat transfer between droplets and substrate was discussed.

Thermomechanical Simulation of Single Splat Solidification and Cooling in Plasma Spray Forming

2010 ◽  
Vol 102-104 ◽  
pp. 719-723
Author(s):  
Liang Rong Zhu ◽  
Hao Ping Zeng ◽  
Wen Ji Xu ◽  
Hong You Li
Keyword(s):  
Residual Stress ◽  
Plasma Spray ◽  
Steel Substrate ◽  
Element Model ◽  
Spray Forming ◽  
Plasma Spray Forming ◽  
Initial Stage ◽  
Minimum Residual ◽  
Thermomechanical Simulation ◽  
Stress States

Mechanical strength and service life of the coatings manufactured by plasma spray forming are significantly reduced by residual stresses. A 2D finite element model constructed for temperature and residual stress simulation of a single stainless steel splat solidifying and cooling on the carbon steel substrate is presented in this paper. Simulated results show that the temperature of the splat rim is higher than that of the central part during the initial stage of solidification, and the temperature difference between the two parts reverse thereafter. The minimum residual stress locates at the rim of the top surface of the splat, and the maximum residual stress, which decreases when the substrate is preheated to a higher temperature, situates at the rim of the interface. Stresses appear as tensile stresses within the splat and compressive stresses within the substrate. The research can provide quantitative understanding of the temperature and residual stress states at the splat level.

Plasma-Spray-Forming of Alumina Matrix Composite Reinforced with Metal Thin Wire

2000 ◽  
Author(s):  
S. Sodeoka ◽  
T. Inoue ◽  
M. Suzuki
Keyword(s):  
Plasma Spray ◽  
Spray Forming ◽  
Filament Winding ◽  
Atmospheric Plasma ◽  
Thin Wire ◽  
Alumina Matrix ◽  
Plasma Spray Forming ◽  
Inconel 600 ◽  
The Matrix ◽  
The Wire

Abstract Alumina matrix composites reinforced with metal thin wire (Inconel-600) were successfully fabricated by plasma spray forming. The atmospheric plasma sprayed matrix layers and wire layers arranged by filament-winding technique were piled up alternately. Though the matrix and the wire were partially bonded only on the side which sprayed particles came flying to, a solid structure was obtained by this technique. Spraying in one direction perpendicular to the substrate made peculiar V-shape pores around the wires, but tilting the torch was effective to reduce the pores. The flexural strength of composite did not increase in spite of some crack deflections on the fracture surface. Owing to the wire pullout, however, the composite exhibited a remarkably higher apparent fracture energy than that of monolithic alumina ceramics.

Plasma spray forming metals, intermetallics, and composites

JOM ◽  
1993 ◽  
Vol 45 (7) ◽  
pp. 42-49 ◽  
Author(s):  
Sanjay Sampath ◽  
Herbert Herman
Keyword(s):  
Plasma Spray ◽  
Spray Forming ◽  
Plasma Spray Forming

Simulation Analysis of Splat Deposition in Plasma Spray Forming

2011 ◽  
Vol 291-294 ◽  
pp. 505-508
Author(s):  
Zi Yu Zhao ◽  
Bi Bo Xia ◽  
Su Zhi Zhang ◽  
Li Wang
Keyword(s):  
Numerical Simulation ◽  
Plasma Spray ◽  
Particle Deposition ◽  
Simulation Analysis ◽  
Spray Forming ◽  
Impact Factors ◽  
Ansys Software ◽  
Coating Quality ◽  
Plasma Spray Forming ◽  
The Impact

Splat deposition is an important part influencing coating quality in plasma spray forming. Flatten behavior of a single Ni droplet falling on a smooth substrate is evaluated by numerical simulation of ANSYS software, this paper meanwhile researches a single Ni particle deposition in the surface of flattened Al2O3 sheet and thin Al particles, the impact factors of particles flattening and the mechanism of the interaction between particles are also studied. The results have benefit to improving the coating porosity and bond strength between particles.

Characterizaton of Plasma Sprayed Aluminum-Beryllium for Aerospace and Space Application

2000 ◽  
Author(s):  
R.G. Castro ◽  
D.J. Thoma ◽  
R.U. Vaidya ◽  
R.D. Field
Keyword(s):  
Plasma Spray ◽  
National Laboratory ◽  
Weight Ratio ◽  
Acoustic Vibration ◽  
Spray Forming ◽  
Launch Vehicles ◽  
Space Applications ◽  
Plasma Spray Forming ◽  
Los Alamos National Laboratory ◽  
Plasma Sprayed

Abstract There is a continued need within the aerospace and space communities to increase the structural efficiency of launch vehicles in order to increase the payload and/or lower fuel usage. Many of these structures have critical stiffness demands because of deflection, buckling, or acoustic/vibration damping. Aluminum-beryllium (Al-Be) is a candidate material for many such structural components because it has a very high stiffness to weight ratio (second only to pure beryllium) and has superior formability and weldability as compared to beryllium. The strength to weight ratio of commercial Al-Be is superior to aluminum alloys (7050 and 6061-T6) that are currently used for aerospace and space applications. Plasma spray forming of Al-Be alloys is being investigated at Los Alamos National Laboratory for producing axial symmetric components for aerospace and space applications. Plasma spray forming of beryllium and beryllium alloys was investigated during the 1960's and 70's by Union Carbide Speedway Laboratories and the Atomic Weapons Establishment for producing axial symmetric launch vehicle components for defense related applications. Information is presented on the thermal and mechanical properties of plasma sprayed AlBeMet which is a commercial Al-Be alloy produced by Brush Wellman Inc.

Consolidation and Mechanical Properties of Near-Net-Shape Al-21 wt.% Si Component Fabricated by Plasma Spray Forming

2007 ◽  
Vol 119 ◽  
pp. 183-186 ◽  
Author(s):  
Soon Jik Hong ◽  
S. Patil ◽  
Chang Kyu Rhee ◽  
S. Seal
Keyword(s):  
Mechanical Properties ◽  
Plasma Spray ◽  
Room Temperature ◽  
Spray Forming ◽  
Homogeneous Distribution ◽  
Cast Material ◽  
Plasma Spray Forming ◽  
Fine Microstructure ◽  
Near Net Shape ◽  
Increased Strength

The microstructure and mechanical properties of Al-21 wt% Si components fabricated by plasma spray forming are analyzed. The microstructure of the plasma spry formed component showed a homogeneous distribution of fine Si particles embedded in the Al matrix. The grain size of α-Al varied between 200 to 500 nm and the size of the Si particles was about 50 to 100 nm in the plasma spray formed component. The room temperature tensile strength of the plasma spray formed component was 215 MPa with 0.5 % elongation, while for cast material, it was 130 MPa. Despite the porosities, the ultra-fine microstructure and homogeneous distribution of Si particles embedded in matrix are the foundation of the increased strength of the plasma spry formed component.

Sign in / Sign up

Export Citation Format

Share Document