Influence of hydrogen- and water vapor-containing atmospheres on the properties of oxide composite ceramics for thermal process engineering

Project description:

The project investigates the influence of hydrogen- and water vapor-containing, oxidizing or reducing atmospheres at temperatures up to 1200 °C on the microstructure and properties of oxide fiber composites (OFC). Corrosion mechanisms that occur are described in corrosion models, and strategies for reducing/preventing corrosion are developed, implemented, and validated. Corrosion tests lasting up to 2000 hours are carried out on self-produced and commercial OFCs in different atmospheres and at different temperatures. Comparison with “as-fired” and aged samples enables the influence of corrosion on the OFC to be determined. If necessary, corrosion stability is then increased by reducing the open porosity/coating the OFC.

The effects of corrosive atmospheres on the properties of OFC are to be determined and strategies for corrosion-stable OFC developed. This should bring about a shift away from the trial and error principle toward the reliable use of OFC in known and new applications. Calculating the sustainability of the materials should provide support for arguments in favor of their use. The manufacture and use of OFC for new applications is mostly carried out by SMEs. High material costs and a lack of knowledge about how application atmospheres affect the material lead to a reluctance to use it, which inhibits innovation. The results regarding corrosion-stable OFC can be quickly implemented by SMEs, as the equipment costs are low and the optimization steps can be carried out downstream of existing processes.

The results are disseminated through continuing education events, discussion rounds with industry partners, and print and electronic publications.

Laufzeit: 10/2025 – 03/2028

Fördergeber: BMWE, IGF

Ansprechpartner: Dipl. Ing. Georg Puchas