Objective
The objectives of this project are to produce v ery hard ceramic coatings based on boron carbide with high mechanical performance and improved resistance to chemical attack. The first objective especially concerns the oxidation resistance of boron carbide coatings between 600 and 1300C, and the neutralisation of the affinity between boron and iron above 600C during steel machining with coated inserts. The second objective is the reduction of boron diffusion into the substrates during the boron carbide deposition cycle. The project combines three different techniques for coating and doping in order to make diffusion barriers or multi-element compounds: Chemical Vapour Deposition (CVD): multilayer/doped coatings Ion Implantation: diffusion barriers/doping of boron carbide. Molten Salts Deposition: diffusion barriers. The substrates to be coated are cemented carbides and mainly several kinds of steel.
Cutting tests on aluminium/silicon and cast iron showed that the lifetime of cemented carbide cutting tools coated with titanium doped boron carbide is increased by a factor of 5 and 8 respectively. A diffusion barrier for boron carbide deposition on steel as well as on cemented carbide was developed. Attempts to dope boron carbide with titanium and silicon in order to improve its chemical properties at high temperatures were made. Boron carbide doped with titanium showed a moderate increase in weld resistance.
Vanadium, chromium, silicon and titanium carbide diffusion barriers were tested. Of these only titanium carbide was successful.
Doping of boron carbide led to amorphous coatings, whereas multiphase coatings with titanium created in hot wall low pressure chemical vapour deposition (LPCVD) led to uniform titanium borate coatings.
Cutting tests showed that such materials used to coat several types of cutting, drilling and boring tools increased wear resistance.
THE PROJECT CONSISTS OF AN ORIGINAL TECHNIQUE OF DEPOSIT BY CHEMICAL VAPOUR DEPOSITION (CVD) AND BY IONIC IMPLANTATION:
- IONIC IMPLANTATION AT A TEMPERATURE BELOW 150 CELSIUS DEGREES.
- MULTILAYER AND DOPED DEPOSIT BY CVD IN A SINGLE THERMAL CYCLE.
- THERMAL TREATMENT OF STEEL SUBSTRATES LINED WITH DOPED BORON CARBIDE.
- NEUTRALISATION OF THE AFFINITY BETWEEN THE BORON AND THE IRON AT A TEMPERATURE ABOVE 600 CELSIUS DEGREES.
IF SUCCESSFUL, THE ECONOMIC BENEFITS OF THE PROJECT ARE GUARANTED BY THE IMPORTANCE OF THE DIFFERENT INDUSTRIAL APPLICATIONS ENVISAGED:
- PROTECTION AGAINST WEAR OF NON-LUBRIFIED MECHANICAL ELEMENTS
- REALISATION OF MECHANICAL PROSTHESIS
- RESISTANCE VERSUS FATIGUE, ABRASION AND CORROSION OF MECHANICAL ELEMENTS USED IN DIFFERENT INDUSTRIES LIKE CHEMISTRY, OIL, TEXTILE, ETC...
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- natural sciences chemical sciences inorganic chemistry inorganic compounds
- engineering and technology mechanical engineering manufacturing engineering subtractive manufacturing
- engineering and technology materials engineering coating and films
- natural sciences chemical sciences inorganic chemistry metalloids
- engineering and technology materials engineering ceramics
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Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
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Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
42000 Saint-Étienne
France
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.