INVESTIGADORES
DAMONTE Laura Cristina
artículos
Título:
"Local Order Changes In Amorphous Zr52.5Hf2Ti7.5Cu20Al10Ni8 Alloy Upon Crystallization."
Autor/es:
LAURA CRISTINA DAMONTE; BAB, MARISA ALEJANDRA; MENDOZA ZELIS, LUIS; DELEDDA, STEFANO; ECKERT, JURGEN
Revista:
Journal of Metastable and Nanocrystalline Materials
Editorial:
TransTech Publications
Referencias:
Lugar: Switzerland; Año: 2004 vol. 20 p. 499 - 504
ISSN:
0255-5476
Resumen:
Abstract. The local order in Zr52.5Hf2Ti7.5Cu20Al10Ni8 alloy is investigated by perturbed angular
correlation (PAC) in the as-prepared state and after different crystallization steps. The initial
amorphous stage was checked by differential scanning calorimetry and x-ray diffraction
experiments. PAC results showed that the initial amorphous state is well described by a dense
random packing of ions. After the first crystallization step (Ta=723 K) at least two two wide
distributions of frequencies are observed. One of them can be associated with a Ti2Ni-type phase
that may also be observed in the X-ray diffraction pattern at a trace level. Further heat treatments
lead to the precipitation of different intermetallic equilibrium compounds: Zr2Cu, ZrAl2. These
results in combination with DSC and X-ray determinations on the annealed alloy may help to
identify the mechanisms for phase formation upon each annealing step.
results in combination with DSC and X-ray determinations on the annealed alloy may help to
identify the mechanisms for phase formation upon each annealing step.
that may also be observed in the X-ray diffraction pattern at a trace level. Further heat treatments
lead to the precipitation of different intermetallic equilibrium compounds: Zr2Cu, ZrAl2. These
results in combination with DSC and X-ray determinations on the annealed alloy may help to
identify the mechanisms for phase formation upon each annealing step.
results in combination with DSC and X-ray determinations on the annealed alloy may help to
identify the mechanisms for phase formation upon each annealing step.
distributions of frequencies are observed. One of them can be associated with a Ti2Ni-type phase
that may also be observed in the X-ray diffraction pattern at a trace level. Further heat treatments
lead to the precipitation of different intermetallic equilibrium compounds: Zr2Cu, ZrAl2. These
results in combination with DSC and X-ray determinations on the annealed alloy may help to
identify the mechanisms for phase formation upon each annealing step.
results in combination with DSC and X-ray determinations on the annealed alloy may help to
identify the mechanisms for phase formation upon each annealing step.
that may also be observed in the X-ray diffraction pattern at a trace level. Further heat treatments
lead to the precipitation of different intermetallic equilibrium compounds: Zr2Cu, ZrAl2. These
results in combination with DSC and X-ray determinations on the annealed alloy may help to
identify the mechanisms for phase formation upon each annealing step.
results in combination with DSC and X-ray determinations on the annealed alloy may help to
identify the mechanisms for phase formation upon each annealing step.
correlation (PAC) in the as-prepared state and after different crystallization steps. The initial
amorphous stage was checked by differential scanning calorimetry and x-ray diffraction
experiments. PAC results showed that the initial amorphous state is well described by a dense
random packing of ions. After the first crystallization step (Ta=723 K) at least two two wide
distributions of frequencies are observed. One of them can be associated with a Ti2Ni-type phase
that may also be observed in the X-ray diffraction pattern at a trace level. Further heat treatments
lead to the precipitation of different intermetallic equilibrium compounds: Zr2Cu, ZrAl2. These
results in combination with DSC and X-ray determinations on the annealed alloy may help to
identify the mechanisms for phase formation upon each annealing step.
results in combination with DSC and X-ray determinations on the annealed alloy may help to
identify the mechanisms for phase formation upon each annealing step.
that may also be observed in the X-ray diffraction pattern at a trace level. Further heat treatments
lead to the precipitation of different intermetallic equilibrium compounds: Zr2Cu, ZrAl2. These
results in combination with DSC and X-ray determinations on the annealed alloy may help to
identify the mechanisms for phase formation upon each annealing step.
results in combination with DSC and X-ray determinations on the annealed alloy may help to
identify the mechanisms for phase formation upon each annealing step.
distributions of frequencies are observed. One of them can be associated with a Ti2Ni-type phase
that may also be observed in the X-ray diffraction pattern at a trace level. Further heat treatments
lead to the precipitation of different intermetallic equilibrium compounds: Zr2Cu, ZrAl2. These
results in combination with DSC and X-ray determinations on the annealed alloy may help to
identify the mechanisms for phase formation upon each annealing step.
results in combination with DSC and X-ray determinations on the annealed alloy may help to
identify the mechanisms for phase formation upon each annealing step.
that may also be observed in the X-ray diffraction pattern at a trace level. Further heat treatments
lead to the precipitation of different intermetallic equilibrium compounds: Zr2Cu, ZrAl2. These
results in combination with DSC and X-ray determinations on the annealed alloy may help to
identify the mechanisms for phase formation upon each annealing step.
results in combination with DSC and X-ray determinations on the annealed alloy may help to
identify the mechanisms for phase formation upon each annealing step.
The local order in Zr52.5Hf2Ti7.5Cu20Al10Ni8 alloy is investigated by perturbed angular
correlation (PAC) in the as-prepared state and after different crystallization steps. The initial
amorphous stage was checked by differential scanning calorimetry and x-ray diffraction
experiments. PAC results showed that the initial amorphous state is well described by a dense
random packing of ions. After the first crystallization step (Ta=723 K) at least two two wide
distributions of frequencies are observed. One of them can be associated with a Ti2Ni-type phase
that may also be observed in the X-ray diffraction pattern at a trace level. Further heat treatments
lead to the precipitation of different intermetallic equilibrium compounds: Zr2Cu, ZrAl2. These
results in combination with DSC and X-ray determinations on the annealed alloy may help to
identify the mechanisms for phase formation upon each annealing step.
results in combination with DSC and X-ray determinations on the annealed alloy may help to
identify the mechanisms for phase formation upon each annealing step.
that may also be observed in the X-ray diffraction pattern at a trace level. Further heat treatments
lead to the precipitation of different intermetallic equilibrium compounds: Zr2Cu, ZrAl2. These
results in combination with DSC and X-ray determinations on the annealed alloy may help to
identify the mechanisms for phase formation upon each annealing step.
results in combination with DSC and X-ray determinations on the annealed alloy may help to
identify the mechanisms for phase formation upon each annealing step.
distributions of frequencies are observed. One of them can be associated with a Ti2Ni-type phase
that may also be observed in the X-ray diffraction pattern at a trace level. Further heat treatments
lead to the precipitation of different intermetallic equilibrium compounds: Zr2Cu, ZrAl2. These
results in combination with DSC and X-ray determinations on the annealed alloy may help to
identify the mechanisms for phase formation upon each annealing step.
results in combination with DSC and X-ray determinations on the annealed alloy may help to
identify the mechanisms for phase formation upon each annealing step.
that may also be observed in the X-ray diffraction pattern at a trace level. Further heat treatments
lead to the precipitation of different intermetallic equilibrium compounds: Zr2Cu, ZrAl2. These
results in combination with DSC and X-ray determinations on the annealed alloy may help to
identify the mechanisms for phase formation upon each annealing step.
results in combination with DSC and X-ray determinations on the annealed alloy may help to
identify the mechanisms for phase formation upon each annealing step.
a=723 K) at least two two wide
distributions of frequencies are observed. One of them can be associated with a Ti2Ni-type phase
that may also be observed in the X-ray diffraction pattern at a trace level. Further heat treatments
lead to the precipitation of different intermetallic equilibrium compounds: Zr2Cu, ZrAl2. These
results in combination with DSC and X-ray determinations on the annealed alloy may help to
identify the mechanisms for phase formation upon each annealing step.
results in combination with DSC and X-ray determinations on the annealed alloy may help to
identify the mechanisms for phase formation upon each annealing step.
that may also be observed in the X-ray diffraction pattern at a trace level. Further heat treatments
lead to the precipitation of different intermetallic equilibrium compounds: Zr2Cu, ZrAl2. These
results in combination with DSC and X-ray determinations on the annealed alloy may help to
identify the mechanisms for phase formation upon each annealing step.
results in combination with DSC and X-ray determinations on the annealed alloy may help to
identify the mechanisms for phase formation upon each annealing step.
2Ni-type phase
that may also be observed in the X-ray diffraction pattern at a trace level. Further heat treatments
lead to the precipitation of different intermetallic equilibrium compounds: Zr2Cu, ZrAl2. These
results in combination with DSC and X-ray determinations on the annealed alloy may help to
identify the mechanisms for phase formation upon each annealing step.
results in combination with DSC and X-ray determinations on the annealed alloy may help to
identify the mechanisms for phase formation upon each annealing step.
2Cu, ZrAl2. These
results in combination with DSC and X-ray determinations on the annealed alloy may help to
identify the mechanisms for phase formation upon each annealing step.