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pro vyhledávání: '"Rainer Janlewing"'
Autor:
Rainer Janlewing, Uwe Köster
Publikováno v:
Materials Science and Engineering: A. :223-226
Prerequisite for nanocrystallization are high nucleation rates combined with slow growth. The resulting mean (quasi)crystal diameter in so-called bulk Zr-based metallic glasses was observed to decrease with the annealing temperature. In a typical met
Publikováno v:
Journal of Non-Crystalline Solids. :23-28
Glassy Zr–Cu–Ni–Al precursor alloys exhibit quasicrystal forming ability in a narrow concentration range via isothermal heating. The formation of quasicrystals has been explained by various arguments. Often, they are considered as Hume-Rothery
Publikováno v:
Journal of Metastable and Nanocrystalline Materials. :23-30
Publikováno v:
Materials Science Forum. :89-98
Autor:
Rainer Janlewing, Uwe Köster
Publikováno v:
Materials Science and Engineering: A. :833-838
Zr–Cu–Ni–Al alloys belong to the best glass forming systems known. Zr 68.5 Cu 13 Ni 11 Al 7.5 metallic glasses [1] are known to transform by primary crystallization into a quasicrystalline structure. Since small Hf-addition were found to stabil
Publikováno v:
Materials Science Forum. 307:25-30
Autor:
Rainer Janlewing, Uwe Köster
Publikováno v:
MRS Proceedings. 806
Nanocrystalline materials can be produced e.g. by high energy ball milling or vacuum condensation; these methods require powder compaction as a final step. In another route - the nano-crystallization - metallic glasses are used as precursors for nano
Publikováno v:
MRS Proceedings. 644
Zr-Cu-Ni-Al exhibits one of the best glass forming alloys known. In a narrow concentration range, however, annealing leads to the formation of a metastable icosahedral phase. The aim of this paper is to investigate in detail the influence of alloying