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Refractory Materials and Non-oxide Materials
The research group has a long time tradition on refractory and non-oxide materials and is still having a significant activity in this field. For the non-oxide ceramics, the main research has been centered on ceramics for applications in metal production, metal handling, metal machining, structural applications and as heat sinks. The degradation mechanisms of hot pressed TiB2 materials when exposed to liquid aluminium is one topic of present interest. The degradation is studied by careful microscopy studies as well as measurements of mechanical properties in collaboration with Department of Structural Engineering, NTNU. Of special interest has also been to prepare AlN based materials with increased fracture toughness.
The chemical stability of refractory linings in molten salt electrolysis, in particular aluminium electrolysis, is detrimental for achieving long lifetimes of industrial cells. Modern design of electrolysis cells is moved towards larger cells and thinner linings and the technology becomes increasingly more dependent on the materials properties. Our research is conducted in collaboration with SINTEF Materials Technology.
The main activities include:
Liquid phase sintering and hot pressing of AlN, SiC and TiB2 materials.
Study of degradation mechanisms of TiB2 materials in liquid aluminium.
Mechanical characterization (strength, fracture toughness, E-modulus, creep) up to about 1100°C.
Experimental and thermodynamical stability considerations of the different materials. in metals and molten salt environments.
Computational thermodynamics for analysis of the chemical stability of refractory materials for high temperature processes.
Please note that these pages are under devolpoment
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