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Content archived on 2024-04-15

DEVELOPMENT OF CERAMIC AND CERAMIC COMPOSITE MATERIALS FOR STRUCTURAL APPLICATIONS AT HIGH TEMPERATURES WITH IMPROVED CREEP RESISTANCE, CHEMICAL STABILITY AND RELIABILITY

Objective


Project partners were not able to achieve their objectives - of forming through a ceramic bushing. While ceramics have good properties at high temperature in isothermal furnaces, they are not yet robust enough to meet the rigorous conditions imposed by the manufacturing of glass fibre. Therefore, no single ceramic is yet versatile enough to act as a substitute for platinum.

An improvement of the creep properties of zircon-based materials and of ZFME has been achieved, to the detriment of their corrosion behaviour.
THE USE OF THERMO-MECHANICAL CERAMICS IN CRITICAL, HIGH TEMPERATURE, STRUCTURAL APPLICATIONS IS CURRENTLY HINDERED BY A COMBINATION OF FACTORS DEPENDING ON THE TYPE OF CERAMIC MECHANICAL DEGRADATION, ENVIRONMENTAL DEGRADATION AND RELIABILITY.

OXIDE CERAMICS POSSESS THE BEST RESISTANCE TO ENVIRONMENTAL DEGRADATION COMPARED WO NON-OXIDE CERAMICS. ALTHOUGH THE LATTER CAN CURRENTLY EXHIBIT BETTER RESISTANCE TO MECHANICAL DEGRADATION. RECENT RESEARCH IN EUROPE HAS INDICATED THAT OXIDE-MATRIX CERAMIC COMPOSITES CAN ALSO POSSESS IMPROVED RESISTANCE TO HIGH-TEMPERATURE MECHANICAL DEGRADATION.

THE PROPOSED RESEARCH WILL THUS BE DIRECTED TOWARDS THE DEVELOPMENT OF NEW OXIDE-BASED CERAMICS AND CERAMIC COMPOSITES FOR STRUCTURAL APPLICATIONS AT ELEVATED TEMPERATURES:
1) CERAMIC SYSTEM DESIGN AND CHARACTERIZATION OF MECHANICAL PROPERTIES AT ELEVATED TEMPERATURES.
2) DETERMINATION OF STRUCTURAL RELIABILITY BY MEANS OF SOPHISTICATED NON-DESTRUCTIVE EVALUATION TECHNIQUES TOGETHER WITH MECHANICAL CHARACTERIZATION BASED ON MATERIAL FLAWS.
3) CHARACTERIZATION OF MATERIALS DEGRADATION IN CORROSIVE ENVIRONMENTS AT HIGH TEMPERATURES.
4) DEVELOPMENT OF DESIGN CRITERIA AND PROCESSING PROCEDURES SPECIFIC TO THE MANUFACTURE OF HIGH-TEMPERATURE STRUCTURAL PARTS.
5) DEMONSTRATION OF THE POTENTIAL OF THE CERAMICS AND PROCESSING PROCEDURES DEVELOPED BY THE PROPOSED RESEARCH IN A CRITICAL, HIGH-TEMPERATURE APPLICATION CURRENTLY SATISFIED BY A COSTLY STRATEGICALLY IMPORTANT METAL.

Topic(s)

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Call for proposal

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Coordinator

Vetrotex International SA
EU contribution
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Address
Quai des Allobroges 767
73009 Chambéry
France

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Total cost
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Participants (6)