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http://cimav.repositorioinstitucional.mx/jspui/handle/1004/1196| CHARACTERIZATION OF NI-CO-CR POWDERS OBTAINED BY MECHANICAL ALLOYING | |
| LUIS CARLOS ORTIZ LUEVANO EDNA PRIETO GARCIA IVANOVICH ESTRADA GUEL JOSE MARTIN HERRERA RAMIREZ ROBERTO MARTINEZ SANCHEZ | |
| Acceso Abierto | |
| Sin Derechos Reservados | |
| Mechanical alloying | |
| In the present study four compositions of a Ni base alloys were synthesized by mechanical alloying, the compositions were: Ni81Co10Cr9, Ni72Co20Cr8, Ni72Co10Cr18 and Ni64Co20Cr16. Elemental powders with purity higher than 99.5% were used and milled for 0,5,10 and 15h in a high energy Spex 8000 mill. The process control agent used was methanol and the ball to powder ratio was 5:1. Microstructural characterization after the milling process was done by X-ray diffraction technique, using a panalytical X´pert pro diffractometer with Cu Kα radiation (= 1.5406Å) and operated at 40 kV and 35 mA in the 2θ range of 20–110°, the powder morphology and chemical composition in each phase were carried out using a JEOL JSM-5800 scanning electron microscopy equipped with an energy dispersive spectrometer and a High resolution field transmission electron microscopy JEOL JSM2200Fs+CS, 200KV. The density of the powders decreases while the size is heterogeneous and showed an increase in the hardness at higher milling times, which is due to the accumulation of lattice strain introduced by the mechanical alloying process. The microstructure showed a Ni-Co matrix and a segregated dark phase Cr-rich. | |
| 2013 | |
| Memoria de congreso | |
| Inglés | |
| OTRAS | |
| Versión revisada | |
| submittedVersion - Versión revisada | |
| Aparece en las colecciones: | Artículos de Congresos |
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| 01 CHARACTERIZATION OF NI-CO-CR POWDERS.pdf | 1.31 MB | Adobe PDF | Visualizar/Abrir |