Synthesis of nanoprecipitates of vanadium carbides in the alloys with ferrite matrix
|Edward Fras 1, Jan M. Glownia , Edward Guzik|
1. AGH University of Science and Technology (AGH), al. Mickiewicza 30, Kraków 30-059, Poland
The main purpose of this research is investigation of possibility of carbides nanoparticles precipitation in the alloys with ferrite matrix.Those alloys permit to obtain the optimum plasticity and strength parameters.Investigations provided with cast,heat treated multielements Fe- C alloys with small content of vanadium. Heat treatment was carried out in muffle furnace with a programmable controller. Specimens were encapsulated in vacuum in silica tube to prevent scalling and decarburization. Samples were heated up to austenitizing temperature and held in this temperature, cooled to about 450 oC and then air cooled to room temperature. The TEM examination of the samples revealed that there was a wide range of submicron precipitates in the range of about 10-50 nm. It is assumed that these particles have been precipitated from austenite and ferrite during cooling. Selected area diffraction patterns of these precipitates showed that they had a cubic structure and suggested that formula of these molecules the most probably is VC 0,78.
Presentation: poster at E-MRS Fall Meeting 2003, Symposium G, by Edward M. Fraś
See On-line Journal of E-MRS Fall Meeting 2003
Submitted: 2003-06-11 13:30 Revised: 2009-06-08 12:55