Project description
Understanding glass relaxation at room temperature
For thousands of years, glassmakers have observed that subjecting a viscous liquid to quick cooling makes it adopt a solid glass state that at room temperature is believed to be permanent. However, recent advancements and observations during aluminosilicate glass measurements have shown that glass dynamics aren’t entirely arrested at room temperature. This creates doubt about current glass relaxation beliefs. Funded by the Marie Skłodowska-Curie Actions programme, the RELAX project aims to elucidate the drivers of room temperature relaxation in specific glass types with varying chemical bonding. Project work will include identifying the structural mechanisms responsible.
Objective
Glassmakers have known since ancient times that rapid cooling of a viscous liquid makes it stop flowing and transition into a solid glass state. Glasses are not in thermodynamic equilibrium and consequently their properties change over time as the structure relaxes toward a lower energy state. At room temperature (RT), the glass state is believed to be frozen and remain almost forever (>10^10 years). However, recent stain measurements on aluminosilicate glasses have shown that the dynamics are not fully arrested at RT. That is, RT relaxation occurs and leads to changes in glass volume and enthalpy, thus challenging the current consensus on glass relaxation.
In this project, we will decipher the linkage between structure and RT relaxation in selected glasses with different types of chemical bonding. The aim is to reveal the hidden structural mechanism behind RT relaxation. To this end, we will first elucidate the composition dependence of RT relaxation modes and subject the glasses to varying degree of relaxation to identify the crossover temperature of relaxation modes. Then the structural evolution associated with relaxation will be tracked and the corresponding atomic configurations will be constructed. Finally, we will perform rigidity and energy landscape analyses to reveal the connection between glass network topology and propensity toward RT relaxation.
The project builds on complementary expertise of the fellow applicant (structure characterization, atomistic simulations) and supervisor (relaxation, glass science). Together with the research and training environment provided by the host organization (Aalborg University, Denmark), this will ensure the achievement of this timely and innovative project as well as the dissemination and exploitation of the expected results. The research outputs will deepen our understanding of glass relaxation. The fellow applicant will emerge from the project with new skills, and the capability to launch his own research group.
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 mathematics pure mathematics topology
- engineering and technology materials engineering amorphous solids
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Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Programme(s)
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Multi-annual funding programmes that define the EU’s priorities for research and innovation.
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HORIZON.1.2 - Marie Skłodowska-Curie Actions (MSCA)
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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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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.
HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships
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Call for proposal
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(opens in new window) HORIZON-MSCA-2021-PF-01
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9220 Aalborg
Denmark
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