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Characterization of TiN coating layers using ultrasonic backward radiation
Sung-Jin Song1, Dong-Joo Yang, Hak-Joon Kim
1School of Mechanical Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea. sjsong@skku.edu <sjsong@skku.edu>
Ultrasonics
|June 27, 2006
Summary
This study shows ultrasonic backward radiation can effectively evaluate thin titanium nitride (TiN) ceramic coatings on steel. This nondestructive method is promising for assessing coating integrity and predicting component lifespan.
Area of Science:
- Materials Science
- Non-Destructive Testing
- Surface Engineering
Background:
- Ceramic coatings on machinery components degrade over time, necessitating reliable methods for property evaluation.
- Assessing coating characteristics nondestructively is crucial for ensuring component reliability and predicting remaining service life.
Purpose of the Study:
- To investigate the effectiveness of the ultrasonic backward radiation technique for characterizing thin titanium nitride (TiN) ceramic coatings.
- To determine if ultrasonic backward radiation can detect changes in TiN coating properties due to variations in specimen preparation.
Main Methods:
- Applied the ultrasonic backward radiation technique to thin TiN ceramic layers on AISI 1045 and austenitic 304 steel substrates.
- Measured ultrasonic backward radiation profiles under varying coating thicknesses and sliding load conditions.
Main Results:
- Observed sensitive variations in the peak angle and peak amplitude of the ultrasonic backward radiation profile.
- These variations correlated directly with changes in coating thickness and applied sliding load.
Conclusions:
- The ultrasonic backward radiation technique shows high potential as an effective tool for the nondestructive characterization of thin TiN ceramic coatings.
- This method can be used to assess the integrity and properties of ceramic coatings in thin regimes.
