Alloys and Composites for High Temperature Applications

Dear Colleagues,

During the last few decades, there have been significant advances in the development of high-temperature materials for potential applications in hot-end components of aero-engines, automotive components such as diesel engine glow plugs, nose-cones and the leading edges of hypersonic re-entry vehicles, steam-turbines and boilers in advanced ultra-supercritical power plants, as well as reactors in nuclear power plants. It is well-accepted that the materials chosen for such applications should not only possess high melting points, but the ability to retain strength and resist environmental degradation by oxidation and hot corrosion, along with ablation at high temperatures and extreme environments. Additionally, it is desirable to have an adequate fracture toughness, fatigue resistance and ductility, along with ease of fabrication to obtain near-net shaped products with optimized composition and microstructures. The researchers developing high-temperature materials are faced with a formidable challenge to meet the aforementioned requirements in a single alloy or composite. The materials drawing worldwide attention for use at high temperatures include: nickel- and cobalt-based superalloys, ferritic stainless steels, precipitation- and dispersion-hardened special steels, Mo- and Nb-based refractory alloys, multiphase intermetallic alloys based on aluminides and refractory silicides, high-entropy alloys, as well as continuous fibre-reinforced carbon-carbon composites, carbon fibre-silicon carbide and ultra-high-temperature ceramics. In recent years, research has been dedicated to developing protective coatings for various alloys and composites, which are susceptible to environmental degradation.

Prof. Dr. Rahul Mitra
Dr. Sumantra Mandal
Guest Editors

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