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Reference : UMR5801-GERVIG2-017
Workplace : PESSAC
Date of publication : Monday, September 07, 2020
Type of Contract : FTC Scientist
Contract Period : 12 months
Expected date of employment : 1 October 2020
Proportion of work : Full time
Remuneration : Between 2617 and 3017 € raw per month or more depending on experience.
Desired level of education : PhD
Experience required : 1 to 4 years
In the frame of an internal project, CEA is carrying out a comparison if the thermomechanical behavior of Distinct C/SiC composites from three different manufacturers. These materials are extremely performant in terms of resistance to oxidation, thermal and mechanical stresses and rather less expensive than SiC/SiC composites.
The proposed work follows a preceding post-doc led at LCTS since 2017.
1 - Acquisition of information on microstructural and mechanical characterization of the pristine materials and on the current state of the art
2 - Comparison of oxidation kinetics of the three materials
3 - Measurement of the evolution of mechanicla performance using a well-established mechanical ageing protocol (load equal to twice the yield stress, under air) at 1000 °C and 1300 °C during 15 minutes :
- with continuous monitoring of damage (Acoustic Emission, Electrical Resistivity)
- with measurement of the residual mechanical properties until failure
4 - Verification of the conservation of mechanical properties whhen cycling below 1000°C
5 - Microstructural charactereizations after testing and comparison with results acquired elsewhere
6 - Possibly, design of planar shear tests on aged coupons
7 - Possibly, application of 1D oxidation propagation models
to interpret the results.
PhD in Materials physico-chemistry or Materials Engineering with focus on mechanics
Post-doctorat financed by CEA
LCTS lab is on the Bordeaux Campus. It is a joint research unit of CNRS, University of Bordeaux, CEA and Safran. With more than 30 years of research on thermostructural composites, LCTS has unique knowledge and ewxpertise in this class of high-performance materials designed for space, aviation, energy and industrial applications.
LCTS is a single research team strongly tied to its non-academic partners. The team currently features 33 permanent staff, ~20 PhD candidates and 4 post-doc researchers.
Constraints and risks
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