The endeavours made in this book are intended to study the effect of material tailoring on the crystallization behaviour, glass forming ability and structure/microstructure of Zr/Cu-based metallic glasses and nanoquasicrystal-glass composites. The substitution of Ga on Al site in Zr-Al-Cu-Ni alloy affects the nucleation and growth characteristics of quasicrystals and consequently changes the morphology of nanoquasicrystals. A new metallic glass composition; Zr-Ga-Cu-Ni with glass transition temperature (Tg); 614 K has been observed. The addition of Ti destabilizes the glassy phase in (Zr-Al-Cu-Ni)Ti alloys. Formation of single quasicrystalline phase by annealing the glass has been found for the alloys. The size of quasicrystal grain decreases with increase of Ti. Rapidly solidified ribbons of Cu-Ga-Mg-Ti and Cu-Al-Mg-Ti alloys show the formation of ¿-brass type phase, which is an approximant of quasicrystals. The Cu-Ga-Mg-Ti alloy display ordered ¿-brass structure, whereas Cu-Al-Mg-Ti leads to the formation of amorphous and nanocrystalline disordered bcc ¿-brass phase. Electron diffraction patterns have been found to show a close structural similarity with the icosahedral phase.
| Autorius: | Devinder Singh, R. S. Tiwari, O. N. Srivastava, |
| Leidėjas: | LAP LAMBERT Academic Publishing |
| Išleidimo metai: | 2014 |
| Knygos puslapių skaičius: | 164 |
| ISBN-10: | 3659620882 |
| ISBN-13: | 9783659620881 |
| Formatas: | Knyga minkštu viršeliu |
| Kalba: | Anglų |
| Žanras: | Astronomy, space and time |
Parašykite atsiliepimą apie „Metallic Glasses, Quasicrystals and their Nanocomposites: Synthesis and Characterization of Metallic Glasses, Quasicrystalline-Glass Composites in some Zr/Cu-Based Alloys“
