Objective
The objectives of this project are the understa nding of fundamental aspects of tribological behaviour of technical ceramics as a function of temperature and gaseous atmosphere. It has already been demonstrated in ambient temperature wear tests that changes in the gaseous environment can produce dramatic changes in wear and friction behaviour due to subtle chemical effects. The ceramic couples tested are silicon carbide and silicon nitride. The tribological tests concern both the friction properties and the wear properties. The parameters under study are: - the configuration of the tribological couple (ball-on-disc, limited trapping of debris, disc-on-disc, full trapping of debris), - pressure and velocity, - temperature (up to 1000C), - atmosphere (dry air, air with a controlled humidity, neutral gas).
Silicon carbide and silicon nitride were tested under different atmospheres (controlled humidity air, neutral gas), over a wide temperature range (0 to 1000 C), under different testconfigurations (ball on disc, disc on disc and flat on flat) and under different loads (200 to 10,000 N). Different velocity accommodation mechanisms and third body formation mechanisms were identified through both particle detachment studies and dynamic observations. Third body properties are shown to govern friction and wear behaviour. Solid lubricants can act as very efficient third bodies if they can be made to stay in contact with the first body. A new lubricant which gave good rubbing properties up to and beyond 600 C was developed.
The research covered: investigations into fundamental aspects of tribological behaviour of technical ceramics as a function of temperature and gaseous atmosphere, for applications in engines and other industrial applications with solid lubricants; investigations to maximise the effectiveness of technical ceramics products maximise the effectiveness of dry friction with a new solid lubricant. It was shown that the use of solid lubricants can be a technologically feasible solution to dry friction. A new lubricant was formulated.
THE CERAMIC SAMPLES WILL BE SILICON CARBIDE, SILICON NITRIDE, AND, EVENTUALLY, PARTIALLY STABILIZED ZIRCONIA.
THE TRIBOLOGICAL TESTS WILL CONCERN BOTH THE FRICTION PROPERTIES AND THE WEAR PROPERTIES. THE PARAMETERS UNDER STUDY WILL BE:
- THE CONFIGURATION OF THE TRIBOLOGICAL COUPLE (BALL ON DISK: LIMITED TRAPPING OF DEBRIS; DISK ON DISK: FULL TRAPPING OF DEBRIS).
- PRESSURE AND VELOCITY
- TEMPERATURE (BEYOND 1000 CELSIUS DEGREES)
- ATMOSPHERE (DRY AIR, AIR WITH A CONTROLLED HUMIDITY, NEUTRAL GAS, AND EVENTUALLY "POLLUTED" ATMOSPHERE).
THE NOVEL ASPECTS OF THIS STUDY WILL RELATE TO THE COMBINED EXPERTISE OF THE FOUR PARTNERS WHICH IS EXPECTED TO PRODUCE NEW KNOWLEDGE OF THE COMBINED CHEMICAL AND MECHANICAL MECHANISMS OPERATING IN THE WEAR PROCESSES OF CERAMICS.
ON THE ECONOMIC FRONT, IN ADDITION TO THE APPLICATION EXPECTED IN THERMAL MACHINES (ENGINES) THE STUDY SHOULD HELP IN THE DEVELOPMENT OF TECHNICAL CERAMICS FOR OTHER INDUSTRIAL APPLICATIONS.
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.
- engineering and technology mechanical engineering tribology lubrication
- natural sciences chemical sciences inorganic chemistry inorganic compounds
- natural sciences chemical sciences inorganic chemistry metalloids
- engineering and technology materials engineering ceramics
You need to log in or register to use this function
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)
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.
Data not available
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.
Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Data not available
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
87065 Limoges
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.