Transformation Kinetics and Resulting Microstructure in MMC Reinforced with TiC Particles
| Periodical | Solid State Phenomena (Volumes 172 - 174) |
|---|---|
| Main Theme | Solid-Solid Phase Transformations in Inorganic Materials |
| Edited by | Yves Bréchet, Emmanuel Clouet, Alexis Deschamps, Alphonse Finel and Frédéric Soisson |
| Pages | 747-752 |
| DOI | 10.4028/www.scientific.net/SSP.172-174.747 |
| Citation | Mickael Mourot et al., 2011, Solid State Phenomena, 172-174, 747 |
| Online since | June, 2011 |
| Authors | Mickael Mourot, Alice Courleux, Moukrane Dehmas, Elisabeth Gautier, Guillaume Geandier, Olivier Dezellus, Jean Claude Viala, Olivier Martin, Nikhil Karnatak, Frederic Danoix |
| Keywords | Chemical Reactivity, Electron Microscopy, Kinetic, Metal Matrix Composite (MMC), X-Ray Diffraction (XRD) |
| Price | US$ 28,- |
The phase transformation kinetics on cooling and resulting microstructures of steel-based matrix composites (MMC) reinforced with TiC particles by powder metallurgy were studied. In addition, the phase transformation kinetics of the MMC were compared to those of the same steel without TiC and consolidated in the same conditions. The presence of TiC particles strongly favors the diffusive transformations in the steel matrix of the MMC. Different complementary techniques (XRD, SEM, TEM/EDX, atom probe tomography, in situ synchrotron XRD) were performed to analyze the chemical reactivity between TiC particles and the steel powders occurring during consolidation process and further heat treatments. Composition changes in the TiC as well as in the matrix were characterized. The chemical composition after treatment in the TiC particles tends toward the thermodynamic calculations with ThermoCalc. The effect of changes in chemical composition and the role of TiC particles acting as new favorable nucleation sites are discussed in regards to the obtained results.
