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Title: Method and apparatus for the evaluation of a depth profile of thermo-mechanical properties of layered and graded materials and coatings

Patent ·
OSTI ID:872029
 [1];  [2];  [3]
  1. Somerville, MA
  2. Cambridge, MA
  3. Wellesley, MA
+ Show Author Affiliations

A technique for determining properties such as Young's modulus, coefficient of thermal expansion, and residual stress of individual layers within a multi-layered sample is presented. The technique involves preparation of a series of samples, each including one additional layer relative to the preceding sample. By comparison of each sample to a preceding sample, properties of the topmost layer can be determined, and residual stress at any depth in each sample, resulting from deposition of the top layer, can be determined.

Research Organization:
Idaho National Laboratory (INL), Idaho Falls, ID (United States)
DOE Contract Number:
AC07-94ID13223
Assignee:
Massachusetts Institute of Technology (Cambridge, MA)
Patent Number(s):
US 5847283
OSTI ID:
872029
Country of Publication:
United States
Language:
English

References (16)

Residual stresses in ceramic coatings as determined from the curvature of a coated strip journal February 1992
Stress distributions and material response in thermal spraying of metallic and ceramic deposits journal April 1990
Measurement of Young's moduli of TiC-coated film by the X-ray method journal December 1993
A method for the determination of gold thin film's mechanical properties journal January 1994
Thermomechanical assessment of plastic coated TAB chips journal January 1992
Elastic stiffness and thermal expansion coefficient of BN films journal January 1980
Calculation of residual thermal stress in plasma-sprayed coatings journal December 1990
Effect of plasma spray processing variations on particle melting and splat spreading of hydroxylapatite and alumina journal September 1993
In Situ Study of Stresses in Ag/Cu Thin Film Multilayers During Deposition journal January 1994
Thermal and Elastic Anisotropy of Thermally Sprayed Coatings journal January 1992
Measurement of the Effect of Temperature on Stress Distribution and Deformation in Multilayer Optical Thin Film Structures journal January 1994
Determination of Young's modulus in vacuum-evaporated thin films of aluminium and silver journal January 1981
The effect of gas nitriding on fatigue behaviour in pure titanium journal July 1994
Mathematical modeling of the isothermal impingement of liquid droplets in spraying processes journal December 1991
Simulation of Thermal Barrier Plasma-Sprayed Coatings journal January 1990
Stochastic approach to the modeling and optimization of thermal spray coating formation journal June 1993

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Related Subjects

method
apparatus
evaluation
depth
profile
thermo-mechanical
properties
layered
graded
materials
coatings
technique
determining
modulus
coefficient
thermal
expansion
residual
stress
individual
layers
multi-layered
sample
involves
preparation
series
samples
including
additional
layer
relative
preceding
comparison
topmost
determined
resulting
deposition
top
individual layers
dual layer
top layer
thermal expansion
mechanical properties
residual stress
technique involves
graded materials
additional layer
determining properties
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