Researchers at Samara State Technical University (SamSTU) have developed an innovative nanostructured material that combines the characteristics of ceramics and metal. This development is promising for the production of heating elements and medical implants.
The university's research team has modeled and synthesized a new inorganic material based on the MAX phase of titanium carbosilicide (Ti3SiC2) with partial replacement of silicon by copper atoms. MAX phases are a special class of layered ceramic materials that exhibit a unique set of metallic properties.
The key properties of MAX phases are due to their atomic layered structure. These materials are characterized by high elasticity, strength, corrosion resistance, excellent thermal and electrical conductivity. They also have a low coefficient of thermal expansion, plasticity, friction resistance, thermal stability, heat resistance, and some have increased resistance to fatigue and oxidation.
To obtain a pure MAX phase, the scientists used an environmentally friendly method of self-propagating high-temperature synthesis. Then the material was modified in a furnace, where copper atoms were introduced into the nanolayered structure of titanium carbosilicide, replacing up to half of the silicon content. The researchers managed to create and experimentally confirm a stable phase of copper-containing titanium carbosilicide (Ti3Si0.93Cu0.07C2).
The new material is considered promising for use as refractory or structural materials. It can be used for high-temperature coatings of electrical contacts, in the production of heating elements, medical implants for bone tissue, and in tribology (the study of friction and wear).
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