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High Temperature Sealing Materials that Self Repairs Raj Singh, Oklahoma State University, DMR 1227789. Outcome : researchers at Oklahoma State University have created a novel glass material for sealing that self repairs.
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Outcome: researchers at Oklahoma State University have created a novel glass material for sealing that self repairs.
Impact: The self-repairable sealing materials are expected to improve reliability, efficiency and economic viability of fuel cell technology for energy production.
Explanation: Glasses are used for sealing and joining materials in a myriad of technological applications. Glass seals are also needed for new and more efficient energy producing devices such as solid oxide fuel cells (SOFCs) for conservation of limited natural resources and for efficient energy production. The seals for SOFCs function at very high temperatures and are susceptible to cracking in service. The research work is developing a new class of glass and glass-composites that self-repair cracks or damage (Fig. 1a-d) thereby providing long-life and cost-effective solutions to seals for SOFCs. The kinetics of self-repair or crack healing is being studied in support of this project (Fig. 1 e).
Fig. 1. Photos showing a cracked glass in (a) and progressive self repair ability (b-d) with time at high temperature. Photo in (d) shows complete repair in a few minutes and (e) shows kinetics of self repair process from data such as in a-d.
Education and Outreach
One research associate was trained from this project and plans are to train a graduate student and an undergraduate student on synthesis of self-repairable glasses as seals for SOFC. One publication resulted from this project so far and future publications and presentations are planned, which are expected to provide opportunities for learning from other researchers in this field, and broaden their professional outlook. Our facility related to SOFCs is toured by prospective high school students and parents, and by other visitors to our research facilities. A workshop for high school teachers is planned by PI during summer of 2013, which is typically attended by 25 teachers. A demonstration of the self-repairable glass seals is planned for the teachers at this workshop.