PhD opportunities

Study of mechanisms for metallization of polymer-based composites obtained by supercritical nitrogen-assisted cold spray

Thesis proposal

Area of expertiseMaterials science and engineering
Doctoral SchoolSystems Engineering, Materials, Mechanics, Energy
SupervisorM. Michel JEANDIN
Co-supervisorM. Francesco DELLORO
Research unitCentre of materials
ContactJEANDIN Michel
Starting dateOctober 1st 2019
KeywordsCold spray, supercritical nitrogen, metallization, composites, polymer
AbstractThe proposed thesis work is based on the study of mechanisms which govern metallization of organic-based composites using supercritical nitrogen-assisted cold spray. This innovative process consists of a first stage of metal coating with a supercritical nitrogen jet to result in metal bond coat due to mechanical anchoring. This bond coat is expected to promote the adhesion of a subsequent top layer obtained in a second stage by cold spray due to protection of the polymer substrate from thermal and erosion effects when spraying. This high-adhesion bond coat shows a good physicochemical affinity and a property gradient with the final metal coating to be deposited.
Following a comprehensive state-of-the-art survey and technology training, the PhD student will have to design experiments and carry out spray tests using experimental facilities at CRITT TJFU in Bar-le-Duc (i.e. at ICEEL: Institut Carnot Energie et Environnement en Lorraine). Observation and analyses of the resulting specimens will be performed at the Materials Center of MINES ParisTech in Evry, where, when required, additional processing experiments such as CO2 dry ice blasting and cold spray. The investigation will focus on surface and interface analyses, with emphasis on morphological aspects to be related to adhesion properties. The experimental study will be coupled to a theoretical approach to physical and mechanical phenomena involved in the process. The establishing of predictive models consists of a relevant target in the thesis study.
The candidate is asked to show a sound background in materials science and engineering, including both experimental and modeling aspects. He is requested to have a strong predilection for experimental work, including for the use of machines and big facilities, in a work team.
The PhD will be appointed for 3 years by CRITT TJFU for work which will be shared equally between CRITT/Bar-le-Duc and MINES ParisTEch/Evry.
ProfileTypical profile for a thesis at MINES ParisTech: Engineer and / or Master of Science - Good level of general and scientific culture. Good level of knowledge of French (B2 level in french is required) and English. (B2 level in english is required) Good analytical, synthesis, innovation and communication skills. Qualities of adaptability and creativity. Teaching skills. Motivation for research activity. Coherent professional project.

Applicants should supply the following :
a detailed resume
a covering letter explaining the applicants motivation for the position
detailed exam results
two references : the name and contact details of at least two people who could be contacted
to provide an appreciation of the candidate
Your notes of M1, M2
level of English equivalent TOEIC

to be sent to
FundingConvention CIFRE