Autor: |
Thomas Graule, T. Minghetti, M. Bahraini, K. Berroth, J. Schubert, C. Schelle, M. Zoellig, Jakob Kuebler |
Rok vydání: |
2009 |
Předmět: |
|
Zdroj: |
Composites Part A: Applied Science and Manufacturing. 40:1566-1572 |
ISSN: |
1359-835X |
DOI: |
10.1016/j.compositesa.2009.06.016 |
Popis: |
Metal-matrix composites (MMCs) were produced by activated pressureless infiltration of porous Al2O3 compacts with the presence of elemental titanium as an activator and steel (X38CrMoV5-1) as the metal matrix. The quality of infiltration was subsequently investigated by scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX). The results show that poor quality of infiltration is associated with blocking of infiltration channels due to the formation of Ti-rich phases which are accumulated over infiltration depth. To prevent the pores blocking, a layer-graded activator green body in which the activator quantity is decreased with infiltration depth was used. Furthermore, it could be shown that the mechanism based on evaporation/condensation of metal onto activator particles is in agreement with the results of this study. |
Databáze: |
OpenAIRE |
Externí odkaz: |
|