scholarly journals Microstructure and Oxidation Resistance of Laser Remelted Plasma Sprayed Nicraly Coating

2016 ◽  
Vol 61 (2) ◽  
pp. 1183-1191
Author(s):  
D. Niemiec ◽  
G. Moskal ◽  
Ł. Carski
Keyword(s):  
Laser Treatment ◽  
Oxidation Resistance ◽  
Laser Melting ◽  
Nicraly Coating ◽  
Plasma Sprayed Coatings ◽  
Plasma Sprayed ◽  
The Impact ◽  
Sprayed Coatings ◽  
Microscopic Investigations

Abstract The article presents results of research relating to the impact of laser treatment done to the surface of plasma sprayed coatings NiCrAlY. Analysis consisted microstructure and oxidation resistance of coatings subjected to two different laser melting surfaces. The test were performed at a temperature 1000°C the samples were removed from the furnace after 25, 300, 500, 750 and 1000 hours. The investigations range included analysis of top surface of coatings by XRD characterization oxides formed types and microscopic investigations of coatings morphology

Local Laser Treatment of Tribological Plasma Sprayed Coatings

1998 ◽  
Author(s):  
T. Otmianowski ◽  
B. Antoszewski ◽  
W. Zorawski
Keyword(s):  
Laser Beam ◽  
Laser Treatment ◽  
Coating Layer ◽  
Tribological Test ◽  
Test Pieces ◽  
Steel Base ◽  
Plasma Sprayed Coatings ◽  
Plasma Sprayed ◽  
Sprayed Coatings

Abstract In the article the results of set of experiments concerning the changes in microstructure of plasma sprayed Al2O3, Cr2O3 and W2C coatings of tribological test pieces obtained with use of locally applied laser beam treatment are given and discussed. The improvement of sprayed on coating layer adhesion to the steel base was ascertained and evaluated. The possibilities of the application of the described technology for development and production of slide elements of tribological joints are noticed.

Recombination of silica and zirconia into zircon by means of laser treatment of plasma-sprayed coatings

2008 ◽  
Vol 43 (6) ◽  
pp. 1948-1957 ◽  
Author(s):  
S. Schelz ◽  
F. Enguehard ◽  
N. Caron ◽  
D. Plessis ◽  
B. Minot ◽  
...  
Keyword(s):  
Laser Treatment ◽  
Plasma Sprayed Coatings ◽  
Plasma Sprayed ◽  
Sprayed Coatings

scholarly journals The Influence of Nicraly Coatings Roughness on Oxidation Kinetics During Static Oxidation Test at Temperature 1000ºC And 1100ºC / Wpływ Przygotowania Powierzchni Na Kinetykę Utleniania Warstw Typu Nicraly Pod Wpływem Statycznego Utleniania W Temperaturze 1000ºC I 1100ºC

2015 ◽  
Vol 60 (4) ◽  
pp. 2671-2680
Author(s):  
D. Niemiec ◽  
G. Moskal ◽  
A. Jasik
Keyword(s):  
Oxidation Kinetics ◽  
Thermal Spraying ◽  
Oxidation Test ◽  
Nicraly Coating ◽  
Static Oxidation ◽  
Plasma Sprayed ◽  
The Impact ◽  
Kinetics Of ◽  
Microscopic Investigations

The article presents the results of research related to the impact of pretreatment plasma sprayed NiCrAlY coating on the kinetics of the oxidation. The analysis covered the shell subjected to thermal spraying. The test were performed at a temperature of 1000ºC and 1100ºC the samples were removed from the furnace after 25, 300, 500, 750 and 1000 hours. The investigations range included analysis of top surface of coatings by XRD characterization oxides formed types and microscopic investigations of coatings morphology.

scholarly journals Studies on Erosion Behavior of Plasma Sprayed Coatings of Glass Microspheres Premixed with Al2O3Particles

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Gaurav Gupta ◽  
Alok Satapathy
Keyword(s):  
Wear Rate ◽  
Test Procedure ◽  
Glass Microspheres ◽  
Sem Images ◽  
Test Standards ◽  
Air Jet ◽  
Plasma Sprayed Coatings ◽  
Plasma Sprayed ◽  
The Impact ◽  
Sprayed Coatings

Solid particle erosion (SPE) tests are carried out to evaluate the performance of plasma sprayed coatings of borosilicate glass microspheres (BGM) premixed with Al2O3particles on metallic substrates. For this purpose, an Air Jet Erosion test rig confirming to ASTM G 76 test standards is used. Relative influence of different operating parameters on erosion rate is assessed by statistical analysis of the experimental findings that are based on Taguchi’s L16orthogonal array. This analysis helps to identify the most significant factor affecting the erosion wear rate of the coating. The study reveals that the impact velocity, impingement angle, erodent size, and Al2O3content in the feed stock, in the declining sequence, are the significant factors influencing the wear rate of these coatings. An Artificial Neural Network (ANN) approach is then implemented taking into account training and test procedure to predict the triboperformance of these coatings under wear conditions beyond the experimental range. Further, the microstructural features of the eroded samples are studied from SEM images to identify possible wear mechanisms.

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