R. A. Andrievski

Institute of Problems of Chemical Physics, Semenov Prospect, 1, Chernogolovka, Moscow Region, 142432, Russia, e-mail: ara@icp.ac.ru

New subjects in the field of high-melting point compounds, such as MAX-phases (where M is an early transition metals, A is an A-group (12-16) element, and X is carbon/nitrogen), MXenes (graphene analogues), 2D BN nanosheets, high-entropy nitrides/carbides, and twinned structures, are described in details. New experimental and theoretical results are discussed and compared with those for traditional carbides and nitrides. Special attention is paid to the new nanomaterials stability under thermal, irradiation, deformation, and corrosion actions. New spheres of possible applications are highlighted. Some unresolved problems are emphasized.