mc flyer technische-keramiken en - fraunhofer itwm · contact-free: the specimen does not come into...
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■■ Robust design with long-term stability■■ User-friendly operator and analysis inter-
face
■■ Simple adaptation to measuring task■■ Radiation harmless to health
The system
■■ Contact-free: the specimen does not
come into contact with any coupling
medium■■ Simple integration of compact measure-
ment modules into existing production
and quality systems
■■ Specimens with internal cavities can be
analyzed■■ Inspection of green ceramics and sin-
tered ceramics ■■ Measurement in transmission and reflec-
tion configuration
The benefits
Non-destructive testing using terahertz measurement techniques
The testing of ceramic materials makes high demands on the selected test procedure.
Terahertz measurement techniques allow measurements on the surface and in the interior
space of ceramic specimens. Terahertz measurements are contact-free and do not require
any additional coupling medium, thus avoiding the not uncommon problem of residue re-
moval. In contrast to contactless X-ray techniques, terahertz measurement techniques
present no health risks.
Thickness, defects, cavities and pores can be reliably and clearly detected using this mea-
surement technology.
Technical ceramics
© Fraunhofer ITWM 2017mc_flyer_technische-keramiken_EN
Fraunhofer-Institut für Techno- und
Wirtschaftsmathematik ITWM
Fraunhofer-Platz 1
67663 Kaiserslautern
Germany
Kontakt
Dr. Joachim Jonuscheit
Phone +49 631 31600-49 11
www.TeraTec.org
www.itwm.fraunhofer.de/en
1 + 2 Ceramic compo-
nents such as aircraft en-
gines or insulators can be
tested non-destructively
and in a contact-free man-
ner using terahertz mea-
surement techniques
F R A U N H O F E R I N S T I T U T E F O R I N d U S T R I A l M A T H E M A T I c S I T W M
3 4
1
2
3
180 µm
30 mm
151 µm
143 µm
30 m
m
0 5 10 15 20 25 30 35
0
5
10
15
20
25
30
35
Y / m
m
X / mm
laye
r th
ickn
ess /
μm
200
150
175
125
Mechanical measure
Laye
r th
ickn
ess
/µm
point of measurement0 1 2 3 4 5 6 7 8 9 10 11
Terahertz backTerahertz front
135
90
95
100
105
110
115
120
125
130
The chart shows the thickness distribution from measurements at a certain height level. Turbine blade: Thickness measure-
ment of ceramic thermal barrier coating.
■■ Consultation – on technology and appli-
cation aspects■■ Initial tests – measurements in our appli-
cation lab■■ Feasibility studies – technically and eco-
nomically■■ Equipment rent – for limited-period tasks
■■ Contract measurement – for industry and
research■■ Development – from single components
to individual complete systems■■ Measurements on customer‘s site –with
mobile systems on any large objects
Our offer
■■ Detection of
· Inhomogeneities
· Cracks
· Inclusions
· Cavities and defects on the inside
of the specimen
■■ Measurement of green ceramics and
sintered ceramics■■ Thickness measurement of ceramic layers■■ Real-time measurements in coating
processes
Inspection of ceramics3 Ceramic layer on a steel
plate: Thickness fluctua-
tions can be measured.
Left: Specified measure-
ments determined with the
eddy current method
4 Thickness distribution
quantitatively displayed