A Load-based Depth-sensing Indentation Technique for NDE and Life Assessment of Thermal Barrier Coatings

Conference · Fri Jun 12 04:00:00 EDT 2009

OSTI ID:1015338

-J Kang, B S; Feng, C; Tannenbaum, J M; Alvin, M A

In this paper, we present a load-based micro-indentation technique for evaluating material mechanical properties as well as degradation evaluation and debonding/spallation detection of thermal barrier coating (TBC) materials. Instead of using contact area as a necessary parameter, the new technique is based on the indentation load. Coupled with a multiple-partial unloading procedure during the indentation process, this technique results in a load-depth sensing indentation system capable of determining Young’s modulus of metals, superalloys, and single crystal matrices, and stiffness of coated material systems with flat, tubular, or curved architectures. This micro-indentation technique can be viewed as a viable non-destructive evaluation (NDE) technique for determining as-manufactured and process-exposed metal, superalloy, single crystal, and TBC-coated material properties. This technique also shows promise for the development of a portable instrument for on-line, in-situ NDE and mechanical properties measurement of structural components.

• Research Organization: National Energy Technology Laboratory - In-house Research
• Sponsoring Organization: USDOE Assistant Secretary for Fossil Energy (FE)
• OSTI ID: 1015338
• Report Number(s): NETL-TPR-2279
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AIR
COATINGS
DETECTION
EVALUATION
FLEXIBILITY
HEAT RESISTING ALLOYS
Indentation
MATRICES
MECHANICAL PROPERTIES
MONOCRYSTALS
SEAS
TBC
THERMAL BARRIERS
UNLOADING
micro-indentation technique
thermal barrier coating