Aerospace Composites and Coatings - Testing Nano-Mechanical Properties using the NanoTest System - from by Micro
Materials
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Topics Covered
Background Micro Materials NanoTest System
NanoTest Ideal for a Range of Applications in the Aerospace
Sector Customer Case Study: Cranfield University Customer Case Study: University of Bordeaux
Background
Micro
Materials Ltd are based in Wrexham, UK, which is located approximately one
hour from the cities of Manchester and Liverpool.
Micro
Materials provide innovative, versatile nanomechanical test instrumentation,
and respond to developments in applications in response to customer and market
requirements. The integrity, reliability and accuracy of our equipment is
paramount, as is our relationship with our users.
Micro Materials NanoTest System
The MML
NanoTest(TM) system is a fully flexible nano-mechanical property measurement
system, offering a complete range of nanomechanical and nanotribological tests,
including nanoindentation, nano-scratch and wear, nano-impact and fatigue,
elevated temperature nanoindentation and indentation in fluids.
Amongst other parameters, the NanoTest(TM) is capable of measuring hardness, modulus,
toughness, adhesion and many other properties of thin films and other surfaces
or solids.
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NanoTest Ideal for a Range of Applications in the Aerospace
Sector
The unique high temperature capability of the NanoTest
system has opened up a wide variety of applications in the aerospace sector
including interconnect technology and turbine improvement with thermal barrier
coatings.
The following case studies from Cranfield University and The University of
Bordeaux demonstrate work being carried out in this sector.
Customer Case Study: Cranfield University
At Cranfield University, John Nicholls and co-workers have been using
elevated temperature nanoindentation to investigate the mechanical properties of
advanced thermal barrier coatings (TBCs) for turbine engines. EB-deposited YSZ
coatings are not at all "nano" in terms of their thickness, but are rather
heterogeneous and columnar. Prof Nicholls and his team realised that the
individual erosive events occurring during use were on the scale of the
individual columns and so it was necessary to probe their properties by small
scale testing rather than bulk measurements.
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The variation in the TBC hardness and modulus with temperature is shown in
the table below. To avoid probe oxidation over 500°C a sapphire indenter was
used.
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Room Temperature |
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500°C |
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750°C |
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Customer Case Study: University of Bordeaux
At the Laboratory for Thermostructural Composites (LCTS), Bordeaux, Dr
Stephane Jouannigot and his team have been using their NanoTest to investigate
the influence of modifying the fibre surface chemistry on the fibre-matrix bond
strength in C/C composites for structural aerospace applications. With the
accurate positioning and by using a flat-ended indenter to push out the fibres
Dr Jouannigot has been able to show marked influence of different fibre
pre-treatments on bond strength.
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Source: Micro Materials Ltd
For more information on this source please visit Micro
Materials
Date Added: Oct 12, 2009
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