Preparation of the Chromium Carbides Cr7C3 and Cr23C6
Abstract
The study of preparation techniques of given chromium carbides was needed to obtain single phase carbides for determination of electrochemical and corrosion characteristics. Intercrystalline corrosion in Ni-Cr steel was correlated with the presence of these chromium carbides. The effect of temperature in the 1100-1500 degree centigrade range was studied on the composition of given products. At a temperature lower than the optimum the product contained given chromium carbides; at a higher temperature, it contained given chromium carbides impurity. The single phase nearly stoichiometric chromium carbides given was prepared by on heating at 1400 degrees centigrade a briquetted charge of electrolytic chromium and lamp black in a hydrogen stream for 15 min. Two given mixtures were produced at a temperature below or above 1400 degrees centigrade respectively.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 12, 1970
- Accession Number
- AD0713879
Entities
People
- M. Kh. Freid
- V. A. Suprunov
Organizations
- National Air and Space Intelligence Center