Accession Number : AD0610792

Title :   ON REACTIVE DIFFUSION OF BORON AND CARBON IN HIGH-MELTING TRANSIENT METALS,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Samsonov,G. V. ; Epik,O. P.

Report Date : 22 JAN 1965

Pagination or Media Count : 7

Abstract : This paper deals with an investigation of the effect of the conditions of boration and carbidization of titanium, zirconium, niobium, tantalum, molybdenum and tungsten on the structure, phase composition and thickness of diffusive carbide and boride coatings. The parameters of the diffusion of boron and carbon in the enumerated metals are determined by the results of metallographic, x-ray and chemical investigations, as well as measurements of the thickness and microhardness of the diffusion layers. The previously established dependence between thecriterion of acceptor capacity of the d-electron shell of metal atom1/Nn (n is the number of electrons on the d-shell, N is the principal quantum number) and the magnitude of energy activation is confirmed. (Author)

Descriptors :   (*COATINGS, TRANSITION METALS), (*TRANSITION METALS, CERAMIC COATINGS), (*BORON, DIFFUSION), (*CARBON, DIFFUSION), TITANIUM, ZIRCONIUM, NIOBIUM, TANTALUM, MOLYBDENUM, TUNGSTEN, CARBIDES, BORIDES, MICROSTRUCTURE, HARDNESS, PHASE STUDIES, HEAT OF ACTIVATION, THICKNESS, USSR

Distribution Statement : APPROVED FOR PUBLIC RELEASE