High-Temperature Erosion and Corrosion Measurement of Thermally Sprayed Materials

2003 ◽  
Vol 5 (4) ◽  
pp. 213-217 ◽  
Author(s):  
S.C. Cha ◽  
P. Wölpert
Keyword(s):  
High Temperature ◽  
High Temperature Erosion ◽  
Thermally Sprayed

scholarly journals High Temperature Erosion-oxidation Resistance of Thermally Sprayed Nanostructured Cr3C2-25(Ni-20Cr) Coatings

2017 ◽  
Vol 20 (4) ◽  
pp. 994-1002 ◽  
Author(s):  
Cecílio Alvares da Cunha ◽  
Olandir Vercino Correa ◽  
Isaac Jamil Sayeg ◽  
Lalgudi Venkataraman Ramanathan
Keyword(s):  
High Temperature ◽  
Oxidation Resistance ◽  
High Temperature Erosion ◽  
Thermally Sprayed

High Temperature Erosion-Oxidation Behavior of Thermally Sprayed NiCr Based Alloy and Cermets Coatings

2006 ◽  
Vol 530-531 ◽  
pp. 117-125 ◽  
Author(s):  
Clarice Terui Kunioshi ◽  
Olandir Vercino Correa ◽  
Lalgudi Venkataraman Ramanathan
Keyword(s):  
Electron Microscope ◽  
High Temperature ◽  
Scanning Electron Microscope ◽  
Fluidized Bed ◽  
Oxidation Behavior ◽  
Steel Substrate ◽  
Alumina Powder ◽  
High Temperature Erosion ◽  
Thermally Sprayed ◽  
Scanning Electron

The erosion-oxidation (E-O) behavior of high velocity oxy fuel (HVOF) sprayed Ni20Cr alloy as well as WC and Cr3C2 cermet coatings on a steel substrate were studied. The E-O tests were carried out in a rig with specimen assemblies that were rotated through a fluidized bed of erodent particles in the temperature range 500-850°C and with erodent impact velocities of 2.5-19.5 ms-1. Alumina powder (~200Am) was used as the erodent. The E-O resistance of the coatings was determined as wastage, as a function of temperature. The three coatings did not exhibit any significant change in E-O at temperatures up to 500-600°C. At higher temperatures, wastage increased with temperature, reached a maximum at 700°C and then decreased with further increase in temperature. Different E-O regimes were identified. The specimen surfaces were examined in a scanning electron microscope and their roughness determined. E-O maps have been drawn that define conditions under which the coatings undergo low, moderate and severe wastage.

Operating Degradations of Air Turbine Scoops of Turbo-Engines

2009 ◽  
Vol 147-149 ◽  
pp. 524-529 ◽  
Author(s):  
Andrzej Szczepankowski ◽  
Janusz Szymczak ◽  
Jaroslaw Spychała
Keyword(s):  
High Temperature ◽  
Early Detection ◽  
Turbine Engines ◽  
Operating Process ◽  
Air Turbine ◽  
High Temperature Erosion

The paper presents various types of turbine scoops damages that are being found in the operating process of air turbine engines (TSO). When dividing them, having in mind a genesis of their origin, a special attention has been paid to corrosion and high-temperature erosion, often being a reason for destruction of the entire unit. The damages hereto described have been illustrated with examples collected during endoscope surveys of TSO internal spaces or their post-failure disassembly. The summary points out to the ways and directions of works aiming at early detection of TSO turbines units damages, and thus at improvement of their operating safety.

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