09/06/2020
The Human Resources Strategy for Researchers

PhD proposal in material science M/F

This job offer has expired


  • ORGANISATION/COMPANY
    CNRS
  • RESEARCH FIELD
    Chemistry
    Physics
    Technology
  • RESEARCHER PROFILE
    First Stage Researcher (R1)
  • APPLICATION DEADLINE
    29/06/2020 23:59 - Europe/Brussels
  • LOCATION
    France › CAEN
  • TYPE OF CONTRACT
    Temporary
  • JOB STATUS
    Full-time
  • HOURS PER WEEK
    35
  • OFFER STARTING DATE
    01/10/2020

OFFER DESCRIPTION

The current knowledge of the properties in metallic materials elaborated by Additive Manufacturing (A.M.) mainly concerns titanium alloys, cobalt-chromium alloys, nickel-based alloys, aluminum alloys and steels. Many metals and alloys remain little or not studied, which is the case of the Ni20Cr alloy. This alloy is currently available in the form of rolled or drawn products. However, certain industrial sectors, for instance in the field of electric transport, are considering the possibility of producing these alloys by additive manufacturing. On one hand, new microstructures related to additive manufacturing are expected to improve the mechanical properties of this alloy. On the other hand, the use of additive manufacturing may help to better control the production of specific Ni20Cr parts. Since the Ni20Cr alloy is often used for the production of heating elements or for its corrosion properties, it is necessary to better understand its electrical properties and its electrochemical corrosion in aqueous media.

Impact of the microstructural characteristics of an Ni-20% Cr alloy produced by additive manufacturing on the electrical properties and the resistance to electrochemical corrosion.

Goals of the PhD
The objective of this thesis, supported by a LABEX project between CRISMAT and GPM laboratories, is to analyze in detail the functional properties of the Ni20Cr alloy developed by additive manufacturing. The thesis carried out at CRISMAT will focus on the tailoring and the understanding of the microstructures obtained by AM, and their impact on electrical resistivity and electrochemical behavior. Emphasis will be brought on the rupture of the electrochemical passivity mechanisms and the electrical behavior in temperature. The results obtained will be compared on the one hand to the behavior of the Ni20Cr alloy obtained by traditional method (drawn and annealed bar), on the other hand to samples sintered by SPS from the powder used for AM.

This thesis requires developing skills on different experimental tools:
- Preparation of samples by metal additive manufacturing
- Analysis of microstructures by optical and electronic microscopy (SEM, MET)
- Electrical temperature measurements
- Installation of electrochemical measurement devices and corrosion tests.

The candidate must have a master's degree in materials science or mechanics, or an engineering degree with equivalent profile, and must have a pronounced taste for experimental science. Autonomy and organizational capacity will be important elements to take into account during recruitment.

More Information

Required Research Experiences

  • RESEARCH FIELD
    Chemistry
  • YEARS OF RESEARCH EXPERIENCE
    None
  • RESEARCH FIELD
    Physics
  • YEARS OF RESEARCH EXPERIENCE
    None
  • RESEARCH FIELD
    Technology
  • YEARS OF RESEARCH EXPERIENCE
    None

Offer Requirements

  • REQUIRED EDUCATION LEVEL
    Chemistry: Master Degree or equivalent
    Physics: Master Degree or equivalent
    Technology: Master Degree or equivalent
  • REQUIRED LANGUAGES
    FRENCH: Basic
Work location(s)
1 position(s) available at
LABORATOIRE DE CRISTALLOGRAPHIE ET SCIENCES DES MATERIAUX
France
CAEN

EURAXESS offer ID: 530356
Posting organisation offer ID: 15739

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