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ASTM E 1461 Document Information:
Title
Standard Test Method for Thermal Diffusivity by the Flash Method
ASTM International
Publication Date:
Nov 1, 2007
Scope:
This test method covers the determination of the thermal
diffusivity of primarily homogeneous isotropic solid materials.
Thermal diffusivity values ranging from 10-7 to
10-3 m2/s are measurable by this test method
from about 75 to 2800 K.
This test method is a more detailed form of Test Method C 714,
having applicability to much wider ranges of materials,
applications, and temperatures, with improved accuracy of
measurements.
This test method is intended to allow a wide variety of
apparatus designs. It is not practical in a test method of this
type to establish details of construction and procedures to cover
all contingencies that might offer difficulties to a person without
pertinent technical knowledge, or to stop or restrict research and
development for improvements in the basic technique.
This test method is applicable to the measurements performed on
essentially fully dense (preferably, but low porosity would be
acceptable), homogeneeous, and isotropic solid materials that are
opaque to the specimen of applied energy pulse. Experience has
shown, however, that some deviation from these strict guidelines
can be accommodated with care and proper experimental design,
substantially broadening the usefulness of the method.
This test method can be considered an absolute (or primary)
method of measurement, since no reference standards are required.
It is advisable to use reference materials to verify the
performance of the instrument used.
The values stated in SI units are to be regarded as the
standard.
For systems employing lasers as power sources, it is imperative
that the safety requirement be fully met..
This standard does not purport to address all of the safety
concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and
health practices and determine the applicability of regulatory
limitations prior to use.
Keywords:
- flash method
- infrared detectors
- intrinsic thermocouples
- specific heat capacity
- thermal conductivity
- thermal diffusivity
- transient temperature measurements
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