New Co-based alloys containing a L12 reinforcement phase display exceptional high-temperature properties.
Nickel-based superalloys are predominantly used as structural materials in high-temperature applications due to their exceptional high-temperature strength based on precipitation hardening by the coherent γ′-phase.
Nickel-based superalloys are primarily used for rotating turbine blades and discs in the hot section of gas turbine engines thanks to their exceptional high-temperature mechanical properties, which are attributed to their characteristic two-phase microstructure: a ductile γ-matrix phase and a coherent L12-ordered γ'-precipitate phase.
Because of their exceptional water resistance and high temperature stability, silicones eventually found nearly universal applications as synthetic rubber, water repellents, hydraulic fluids, and greases.
Bulk SiBCN ceramics derived from polyborosilazanes of the type [B(C2H4SiRNH 3]n (1a, R = CH3; 2a, R = H; C2H4 = CHCH3, CH2CH2) exhibit an exceptional structural stability at high temperature.
Upon primary crystallization of melt spun ribbons, this novel microstructure comprised of a high particle density (>1020 m−3) of Al nanocrystals (20 nm) in an amorphous matrix develops and offers exceptional strength (1500 MPa) and high temperature stability (533 K).
Silicon carbide (SiC) is being investigated for accident tolerant fuel cladding applications due to its high temperature strength, exceptional stability under irradiation, and reduced oxidation compared to Zircaloy under accident conditions.
Low halfwave voltage, ultrahigh bandwidth, and ease of incorporation into sophisticated 3-D circuits are some of the demonstrated advantages of polymeric electro-optic devices; however, for such devices to be commercially viable they must exhibit exceptional stability in harsh environments (high temperature and optical power exposure).
Pearl millet is an important cereal crop for arid and semi-arid regions of Africa and south Asia due to its high nutritional value and its exceptional tolerance to drought and high temperature.
