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Reference : UMR5503-BRICAU-003
Workplace : TOULOUSE
Date of publication : Tuesday, January 05, 2021
Type of Contract : FTC Scientist
Contract Period : 12 months
Expected date of employment : 1 March 2021
Proportion of work : Full time
Remuneration : Between 2648 and 3054 € (gross salary per month) depending on experience
Desired level of education : PhD
Experience required : Indifferent
The objectives of the present post doc project are (1) to simulate the CVD process using a CFD (Computational Fluid Dynamics) code and (2) to perform an experimental scale up of the CVD reactor to treat scale one mold inserts, using the experimental results obtained by the other post doc fellow.
The post doctoral research will be conducted in two research laboratories located at the National School of Chemical and Technological Arts (ENSIACET) of the National Polytechnic Institute of Toulouse (INPT). The Interuniversity Center for Research and Engineering of Materials (CIRIMAT, https://www.cirimat.cnrs.fr/?lang=en) and the Chemical Engineering Laboratory (LGC, https://lgc.cnrs.fr/en/) have complementary and internationally recognized experience in the field of CVD processed thin films5-6. Close collaborations are planned with the Inorganic Materials Chemistry team of Prof. A. Devi at the University of Bochum in Germany, which will supply innovative zirconium oxide precursors, with the Fachhochschule Dortmund which will analyze the barrier property of the films by electrochemical impedance spectroscopy as well as with the Surface, Friction, Vibration team of Prof. S. Benayoun at the Laboratory of Tribology and Dynamics of Systems (LTDS) of the Ecole Centrale de Lyon, which will analyze heat transfer through films.
The successful candidate will have a PhD in chemical engineering applied to CVD or ALD processes or in materials engineering with skills in CFD (fluid mechanics, thermal and mass transfers considering kinetics of chemical reactions). He (she) will have a strong affinity for computational studies and for experimental work. He(she) will be in charge of all the tasks of CFD process simulation and experimental scale up, in interaction with the various above mentioned collaborators. As such, he(she) will have strong teamwork capacity, excellent communication skills in English, strong autonomy and large facility in writing scientific reports.
When it comes to producing a large quantity of plastic parts, injection molding is the gold standard. It allows the fabrication of complex in shape parts with high productivity, which depends on the cycle time and the number of inserts in the mold. While high productivity is often associated with a reduction in production cost, it can nevertheless lead to a decrease in parts quality. This degradation of the quality often corresponds to defects that appear during the premature cooling of the thermoplastic in the mold, or to a modification of the mold by erosion / corrosion when it is heavily used.
Global competition in the plastics market requires cross-sectoral cooperation to foster competitive advantage and innovation, especially in complex production and supply chains. The durability of the injection mold, central element of the production technology and the improvement of the properties of the finished product such as the quality of the surface (aesthetic appearance), become key elements in this competition. These needs are echoed in several areas, such as aeronautics, health (medical, pharmacy) or automotive. In order to meet these needs, two collaborative projects, in France and in Germany, are underway. Each has mixed industrial and academic partnerships, and the two are intimately linked to produce added value.
In this context, the post doc project concerns the development of a chemical vapor deposition (CVD) process providing functional coatings for thermal regulation and anti-corrosion protection, applicable on plastic injection molds. These coatings will be amorphous complex oxides based on zirconium oxide, in particular rare earth zirconates, for example lanthanum1 or gadolinium2. Their low thermal conductivity3, combined with their barrier character reinforced by their amorphous state4 should allow to meet these restrictive specifications. In addition, attention will be paid to the industrially transferable nature of the process, through continuous interaction with the companies participating in the project.
The deposition process and the characteristics of the deposited thin films will be experimentally studied at the lab scale during another post-doctoral work organized in parallel in the same consortium. The two post doc fellows will work in synergy.
Post doc offer
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