A device is presented allowing for in situ investigation of chemically changing materials by means of X-ray imaging. A representative cork ablator sample, additionally instrumented with thermocouples, is encapsulated in an evacuated cell heating a sample surface with a heat flux of 230 kW/m2. The images show the sample surface and the in-depth progression of the char front dividing the char layer from the virgin material. Correlating the images to thermocouple data allows for the deduction of a reaction temperature. For the representative cork ablator investigated at the present conditions, the progression rate of the pyrolysis layer is determined to 0.0285 mm/s and pyrolysis temperature is 770 or 737 K, depending on the pre-existing conditions. It is found that the novel device is ideally suited for volume process imaging.
Skip Nav Destination
Article navigation
July 2016
Research Article|
July 14 2016
Time resolved quantitative imaging of charring in materials at temperatures above 1000 K
Hannah Böhrk;
Hannah Böhrk
a)
Institute of Structures and Design
, German Aerospace Center (DLR), D–70569 Stuttgart, Germany
Search for other works by this author on:
Raouf Jemmali
Raouf Jemmali
Institute of Structures and Design
, German Aerospace Center (DLR), D–70569 Stuttgart, Germany
Search for other works by this author on:
a)
Electronic mail: [email protected]
Rev. Sci. Instrum. 87, 073701 (2016)
Article history
Received:
January 18 2016
Accepted:
June 25 2016
Citation
Hannah Böhrk, Raouf Jemmali; Time resolved quantitative imaging of charring in materials at temperatures above 1000 K. Rev. Sci. Instrum. 1 July 2016; 87 (7): 073701. https://doi.org/10.1063/1.4955441
Download citation file:
Pay-Per-View Access
$40.00
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Citing articles via
Overview of the early campaign diagnostics for the SPARC tokamak (invited)
M. L. Reinke, I. Abramovic, et al.
An instrumentation guide to measuring thermal conductivity using frequency domain thermoreflectance (FDTR)
Dylan J. Kirsch, Joshua Martin, et al.
A glovebox-integrated confocal microscope for quantum sensing in inert atmosphere
Kseniia Volkova, Abhijeet M. Kumar, et al.
Related Content
Combustion of char from plastic wastes pyrolysis
AIP Conference Proceedings (June 2016)
Thermal analysis of the MC-1 chamber/nozzle
AIP Conference Proceedings (February 2001)
Bio-char from treated and untreated oil palm fronds
AIP Conference Proceedings (May 2013)
Preparation and characterization of activated carbon from demineralized tyre char
AIP Conference Proceedings (June 2013)
Modified three-dimensional percolation simulation of char fragmentation and particulate formation
AIP Advances (February 2017)