OXIDATION RESISTANCE OF LOW-TEMPERATURE PACK ALUMINIZING COATINGS ON NI-BASE SUPERALLOY

2010 ◽  
Vol 24 (15n16) ◽  
pp. 3185-3189 ◽  
Author(s):  
BIFEI YUAN ◽  
LONGWEN YU ◽  
GUIWU LU
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
Aluminide Coating ◽  
Nickel Base Superalloy ◽  
Temperature Oxidation ◽  
Pack Aluminizing ◽  
Nickel Base ◽  
Base Superalloy

A nickel-base superalloy has been used to deposit the aluminide coating by low-temperature pack cementation process. The high temperature oxidation tests on aluminized alloys and the uncoated specimens are carried out at 1000°C for 10h. It is observed that a dense and protective Al 2 O 3 surface layer is produced on the aluminized alloy, and the aluminizing process has greatly enhanced the high temperature oxidation resistance of the Ni -base superalloy at 1000°C. As a contrast, the uncoated specimen begins to be failure when treated only for 6h at the same temperature.

High-temperature oxidation of a nickel base superalloy at different oxygen partial pressures

2016 ◽  
Vol 51 (7) ◽  
pp. 513-521 ◽  
Author(s):  
F. A. Pérez-González ◽  
J. H. Ramírez-Ramírez ◽  
M. Terock ◽  
N. F. Garza-Montes-de-Oca ◽  
U. Glatzel ◽  
...  
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Nickel Base Superalloy ◽  
Temperature Oxidation ◽  
Partial Pressures ◽  
Nickel Base ◽  
Base Superalloy

High Temperature Oxidation Behavior of CM-247LC Nickel Base Superalloy

2014 ◽  
Vol 922 ◽  
pp. 61-66 ◽  
Author(s):  
Mau Sheng Chiou ◽  
An Chou Yeh ◽  
Sheng Rui Jian ◽  
Chen Ming Kuo
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Oxidation Behavior ◽  
Nickel Base Superalloy ◽  
Temperature Oxidation ◽  
Gamma Prime ◽  
High Temperature Oxidation Behavior ◽  
Nickel Base ◽  
The Impact ◽  
Base Superalloy

The effects of Aluminum addition on the oxidation behavior of CM-247LC Nickel base superalloy were investigated under high temperature isothermal oxidation test at 1000°C in the dry air. In this study, we explored the difference and observed the micro-structure of oxides, gamma matrix as well as gamma prime precipitate, and further studied the impact of high temperature oxidation behavior and phase stability analysis. Results showed that by adding small amount of Al in CM-247LC superalloy, protective oxides could form more easily, and a more regular morphology of gamma prime in the base material microstructure could be retained, which in-directly reduced the rate of outward diffusion and prevented further oxidation.

Boron Depletion in a Nickel Base Superalloy Induced by High Temperature Oxidation

2015 ◽  
Vol 83 (3-4) ◽  
pp. 393-413 ◽  
Author(s):  
A. Jalowicka ◽  
W. Nowak ◽  
D. J. Young ◽  
V. Nischwitz ◽  
D. Naumenko ◽  
...  
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Nickel Base Superalloy ◽  
Temperature Oxidation ◽  
Nickel Base ◽  
Base Superalloy

Pest Resistant and Low CTE MoSi2-Matrix for High Temperature Structural Applications

1994 ◽  
Vol 350 ◽  
Author(s):  
M. G. Hebsur
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
Matrix Composition ◽  
Temperature Oxidation ◽  
Accelerated Oxidation ◽  
Structural Applications ◽  
Base Matrix ◽  
Sic Reinforcement

AbstractThe objective of this investigation was to identify a pest resistant MoSi2-base matrix composition having properties suitable for SiC reinforcement. A 30 vol.% addition of fine Si3N4 particulates to MoSi2 significantly improved the low temperature accelerated oxidation resistance and thereby eliminated pest failure. Addition of Si3N4 also improved the high temperature oxidation resistance, strength and more importantly lowered the CTE of MoSi2 such that cracking was eliminated in a hybrid composite consisting of 30 vol.% Si3N4 and 30 vol. % SCS-6 fibers.

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