Surface chemical compounds of nonmetal atoms (C, Si, S) with refractory metals (W, Mo, Re, Ir)

The regularities of formation and destruction of surface chemical compounds (SCC) of nonmetal atoms (Si, S, C) and transition metal surfaces (W, Re, M o, Ir) are discussed and the values of kinetic:parameters of these-processe s are deduced. SCC are the absorption layers formed under the conditions of sufficient diffusion mobility of adatoms and having a composition strictly determined by the nature of the adsorbate and the surface of the substrate . Special emphasize is made on the importance of surface chemical compounds consideration in interpretation of diffusion experiment.