Comparison of Thermal Properties of Thermal Barrier Coating Deposited on IN738 Using Standard Air Plasma Spray with 100HE Plasma Spray System
- Southern Univ. and A&M College, Baton Rouge, LA (United States). Dept. of Mechanical Engineering
Thermal barrier coatings (TBCs) have low thermal conductivity values and have a primary benefit of providing an insulating layer that reduces the coated substrate temperature and mitigates the effects of hot streaking or uneven temperature distributions. Thermal conductivity, k, is a thermo-physical property that can be derived from the thermal diffusivity, α, of the specimen. It can be obtained from the formula k = α cp ρ, where cp is specific heat and ρ is the density of the material. Thermal conductivity, k, describes the quantity of heat that passes through a unit area of sample in unit time with a temperature gradient present. This thermal property of TBCs can be measured by flash method in which a nearly instantaneous pulse of energy (usually laser or other discharge source) is input to the frontal surface of a material sample and the temperature changes are measured on back side of sample with and INSb infrared detector as shown in Fig.1. A laser flash test has the advantage of being fast while providing values with excellent accuracy and reproducibility. In this study, an instantaneous triangular heat pulse from a laser heat flash system (FL5000) made by Anter corporation, Pittsburgh, PA was used. The technique satisfies the ASTM E 1461. The test method can measure thermal diffusivity values ranging from 10-7 to 10-3 m2/s from temperatures 75 to 2800 K.
- Research Organization:
- Southern Univ. and A&M College, Baton Rouge, LA (United States)
- Sponsoring Organization:
- USDOE; Clean Power and Energy Research Consortium (CPERC) (United States)
- DOE Contract Number:
- FG52-05N27041
- OSTI ID:
- 889137
- Report Number(s):
- DOE/NA-27041-2; TRN: US200717%%64
- Resource Relation:
- Conference: 14. ICCE International Conference on Composites and Nano Engineering, Boulder, CO (United States), 2-8 Jul 2006
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
ALLOYS
COATINGS
COOLING SYSTEMS
CREEP
DEPOSITION
EFFICIENCY
ENTHALPY
GAS TURBINES
MELTING POINTS
NICKEL
OXIDATION
SPECIFIC HEAT
THERMAL BARRIERS
THERMAL CONDUCTIVITY
THERMAL DIFFUSIVITY
THERMAL FATIGUE
THERMODYNAMIC PROPERTIES
TURBINES
thermal Properties
thermal barrier coating
plasma spray