High-temperature erosion resistance of coatings for gas turbine

Journal Article · Wed Apr 01 04:00:00 EST 1992 · Journal of Engineering for Gas Turbines and Power; (United States)

DOI:https://doi.org/10.1115/1.2906579· OSTI ID:5135094

Tabakoff, W; Hamed, A; Metwally, M; Pasin, M ^[1]

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1. Dept. of Aerospace Engineering and Engineering Mechanics, Univ. of Cincinnati, Cincinnati, OH (US)

This paper reports on an experimental investigation conducted to study the ash particle rebound characteristics and the associated erosion behavior of superalloys and aluminide coatings subjected to gas-particle flows at elevated temperature. A three-component LDV system was used to measure the restitution parameters of 15 micron mean diameter coal-ash particles impacting some widely used superalloys and coatings at different angles. The presented results show the variation of the particle restitution ratios with the impingement angle for the coated and uncoated superalloys. The erosion behaviors of INCO-738, MAR 246 and X40 superalloys and protective coatings C, N, RT22 and RT22B also have been investigated experimentally at h high temperature using a specially designed erosion tunnel. The erosion results show the effect of velocity, temperature and the impact angle on the erosion rate (weight loss per unit weight of particles). Based on the experimental results of the particle mass effect on both weight losses and erosion rates, the coating lives have been estimated for different particle concentrations.

• OSTI ID: 5135094
• Journal Information: Journal of Engineering for Gas Turbines and Power; (United States), Journal Name: Journal of Engineering for Gas Turbines and Power; (United States) Vol. 114:2; ISSN JETPE; ISSN 0742-4795
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330103* -- Internal Combustion Engines-- Turbine
36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
ALUMINIUM ALLOYS
ASHES
COATINGS
COLLISIONS
COMBUSTION PRODUCTS
CONTROL
EQUIPMENT
EROSION
EROSION CONTROL
GAS TURBINES
MACHINERY
MASS
PARTICLES
PROTECTIVE COATINGS
RESIDUES
TEMPERATURE DEPENDENCE
TEMPERATURE EFFECTS
TESTING
TURBINES
TURBOMACHINERY
VELOCITY