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

MAX Phases: Understanding of Erosion, Corrosion and Oxidation Resistance Properties in TiAlSiCN and TiCrSiCN Compositions

2016 ◽  
Vol 1812 ◽  
pp. 9-15
Author(s):  
Alexander Manulyk
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Thermogravimetric Analysis ◽  
Oxidation Resistance ◽  
Max Phases ◽  
Erosion Corrosion ◽  
C And N ◽  
High Temperature Erosion ◽  
Corrosion And Oxidation

ABSTRACTNewly discovered MAX phases are attractive due to their unique combined properties: mechanical, high temperature, erosion and corrosion resistance. These materials are considered metallic and ceramic at the same time, and they could be the perfect solution for a variety of industrial and scientific applications. In this study, detailed attention has been paid to complex compositions of several transition metals, such as Ti and Cr in TiCrSiCN, whereas Al and Si are recommended for TiAlSiCN. These materials require a combination of both C and N to form the MAX phases (in the “X” position in the formula M(n+1)AXn). The purpose of this study was to investigate the effect of these elements located at the “M”, “A” and “X” positions on the mechanical properties of the materials. The results of the thermogravimetric analysis of TiCrSiCN showed that this phase is stable at temperatures as high as 1400 °C, while the Ti3SiC2 phase is stable up to 1300 °C.

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.

Phase transformation and layer evolution in molybdenum disilicide-silicon carbide nanolayered coatings

1994 ◽  
Vol 52 ◽  
pp. 538-539
Author(s):  
H. Kung ◽  
T. R. Jervis ◽  
J.-P. Hirvonen ◽  
M. Nastasi ◽  
T. E. Mitchell ◽  
...  
Keyword(s):  
Phase Transformation ◽  
High Temperature ◽  
Oxidation Resistance ◽  
Elevated Temperatures ◽  
Matrix Material ◽  
Molybdenum Disilicide ◽  
High Temperature Strength ◽  
Cross Sectional ◽  
Good Oxidation Resistance ◽  
Structural Applications

MoSi2 is a potential matrix material for high temperature structural composites due to its high melting temperature and good oxidation resistance at elevated temperatures. The two major drawbacksfor structural applications are inadequate high temperature strength and poor low temperature ductility. The search for appropriate composite additions has been the focus of extensive investigations in recent years. The addition of SiC in a nanolayered configuration was shown to exhibit superior oxidation resistance and significant hardness increase through annealing at 500°C. One potential application of MoSi2- SiC multilayers is for high temperature coatings, where structural stability ofthe layering is of major concern. In this study, we have systematically investigated both the evolution of phases and the stability of layers by varying the heat treating conditions.Alternating layers of MoSi2 and SiC were synthesized by DC-magnetron and rf-diode sputtering respectively. Cross-sectional transmission electron microscopy (XTEM) was used to examine three distinct reactions in the specimens when exposed to different annealing conditions: crystallization and phase transformation of MoSi2, crystallization of SiC, and spheroidization of the layer structures.

UDIMET L-605

Alloy Digest ◽  
2004 ◽  
Vol 53 (12) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Gas Turbine ◽  
Oxidation Resistance ◽  
Turbine Blades ◽  
Heat Treating ◽  
Gas Turbine Blades ◽  
Temperature Performance

Abstract Udimet L-605 is a high-temperature aerospace alloy with excellent strength and oxidation resistance. It is used in applications such as gas turbine blades and combustion area parts. This datasheet provides information on composition, physical properties, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, and joining. Filing Code: CO-109. Producer or source: Special Metals Corporation.

NAS HX

Alloy Digest ◽  
2013 ◽  
Vol 62 (4) ◽  
Keyword(s):  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Oxidation Resistance ◽  
Heat Treating ◽  
Molybdenum Alloy ◽  
Nickel Chromium ◽  
Temperature Performance

Abstract NAS HX (UNS N06002) is a nickel-chromium-iron-molybdenum alloy with outstanding strength and oxidation resistance. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance as well as forming, heat treating, and joining. Filing Code: Ni-707. Producer or source: Nippon Yakin Kogyo Company Ltd.

INCOTHERM TD

Alloy Digest ◽  
2005 ◽  
Vol 54 (11) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Oxidation Resistance ◽  
High Temperatures ◽  
Rare Earths ◽  
Temperature Performance

Abstract Incotherm TD is a thermocouple-sheathing alloy with elements of silicon and rare earths to enhance oxidation resistance at high temperatures. This datasheet provides information on composition, physical properties, and tensile properties as well as deformation. It also includes information on high temperature performance and corrosion resistance as well as forming. Filing Code: Ni-628. Producer or source: Special Metals Corporation.

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