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- Gu, Y. W., et al.
(författare)
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Structural evolution in Ti-Si alloy synthesized by mechanical alloying
- 2004
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Ingår i: Physica. B, Condensed matter. - : Elsevier BV. - 0921-4526 .- 1873-2135. ; 352:1-4, s. 299-304
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Tidskriftsartikel (refereegranskat)abstract
- Mechanical alloying of Ti-Si powder mixture was performed by high-energy ball milling at ambient temperature (25 °C). The structural and compositional evolutions during the mechanical alloying process were investigated by X-ray diffraction, energy dispersive spectroscopy, scanning electron microscopy and transmission electron microscopy. Results showed, that the crystallite size of Ti and Si decreased with increasing milling time and the steady-state crystallite size was between 5 and 15nm. The mechanically alloyed Ti-Si powder was predominantly nanocrystalline with traces of the remnant amorphous phase. It was found that a significant increase in solid solubility of Si in Ti was achieved by mechanical alloying. Interdiffusion between the two elements occurred during milling and the dissolution of Si in Ti was obtained after 60 h milling, forming Ti(Si) solid solution. The lattice parameter ratio c/a and the unit cell volume of h.c.p. Ti(Si) were found to decrease with increasing milling time, indicating that the shrinkage of Ti lattice was caused by diffusion of Si atoms into Ti. © 2004 Elsevier B.V. All rights reserved.
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2. |
- Schlegel, C, et al.
(författare)
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K-isomers in very neutron-rich nuclei around mass 180
- 2000
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Ingår i: Physica Scripta. Topical Issues. - 0281-1847. ; T88, s. 72-76
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Tidskriftsartikel (refereegranskat)abstract
- gamma-spectroscopy methods have been used to search for microsecond isomers among the fragmentation products of a 1 GeV/nucleon Pb-208 beam. In particular the population of the known K-pi = 35/2(-) isomer in W-179 has been investigated and several new isomeric decays have been found for neutron rich nuclei in the A approximate to 180-200 mass region. The ground state band of the neutron rich N = 116 system of W-190 has been identified for the first time and we discuss its structure in comparison to neighboring systems.
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5. |
- Schlegel, C, et al.
(författare)
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K-isomers in very neutron-rich nuclei around mass 180
- 2000
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Ingår i: PHYSICA SCRIPTA. - : ROYAL SWEDISH ACAD SCIENCES. - 0281-1847. ; T88, s. 72-76
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- gamma-spectroscopy methods have been used to search for microsecond isomers among the fragmentation products of a 1 GeV/nucleon Pb-208 beam. In particular the population of the known K-pi = 35/2(-) isomer in W-179 has been investigated and several new iso
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