[PDF] Top 20 Electron Irradiation Induced Crystallization of Supercooled Liquid in Zr Based Alloys

... A part of the present experiments was carried out by using a facility in the Research Center for Ultrahigh Voltage Electron Microscopy, Osaka University. The authors are grateful to Prof. H. Mori and Dr. T. Sakata ... See full document

... thermal crystallization, the long-range atomic diffusion for crystallization leads the difficulty of atomic rearrangement from the glassy to crystalline structure, resulting in the retardation of the crystal ... See full document

... phase electron irradiated at 602 K for 600 s at the total dose of 2:7 10 27 m 2 (b) and 552 K for 1:2 10 3 s at 6:0 10 27 m 2 (c), together with the data of electron irradiated at 298 K for 600 s at 1:1 10 ... See full document

... amorphous alloys called metallic glasses were found in many numerous alloy ...Several Zr-based BMGs have been developed and typical examples are also shown in ...binary Zr-Cu and Zr-Ni ... See full document

... glassy alloys in metal- metal alloy systems without any metalloid elements such as Ln-, 1) Mg- 2) and Zr- 3) based alloys by copper mold casting methods, bulk glassy alloys have been ... See full document

... for crystallization, leading to the ap- pearance of high GFA in the Zr-based ...the supercooled liquid ...stable supercooled liquid state in the Zr-based ... See full document

... the Zr-based alloys, maximum speed of the indenter displacement was largely increased from about 7 to 700 mm/s with increasing the heating rate from 20 to 400 C/min, respectively, ... See full document

... amorphous alloys have been of great interest not only as superior functional materials but also as precursors to obtain nanocrystalline ...nano- crystallization often improves mechanical and functional ... See full document

... and Zr-B intermetallic compounds precipitated during thermal annealing are not ...thermal crystallization and electron irradiation induced ...that electron irradiation is ... See full document

... of liquid (LQ) or vapor phase (VQ), mechanical alloying, severe deformation and ...1,2) Electron irradiation induced amorphization is of interest from the viewpoint of amorphization in solid ... See full document

... 2,3) alloys are known to have an amorphous phase in their wide composition ...Ni–Zr alloys, in addition to the formation range of an amorphous ...Ni–Zr alloys exhibit useful properties ... See full document

... minimum. Crystallization is anticipated to take place with continuous heating (particularly under loading for the stress-induced crystallization effect) and viscosity ...three alloys occur at a ... See full document

... The formation of the Pt–Zn alloy also seems explained within the framework of radiolysis and accompanying electrostatic charging. First, we should address where Pt comes from. Since the ZnO crystal used in the present ... See full document

... the liquid, and the glass transition was treated as a second order transition, using the Hillert–Jarl ...of crystallization, and the time–temperature–transformation (TTT) curves were estimated from the ... See full document

... glassy alloys in Fe-, Co- and Ni-based systems al- ways belong to metal-metalloid type as exemplified for Fe– (Al, Ga)–(P, C, B), 10) Fe–(Zr, Hf, Nb)–B, 16) Co–Fe-(Nb, Ta)– B 13) and Ni–(Cr, Mo, ... See full document

... to Zr-, 3,4) Fe-, 5) Pd-, 6) Ti-, 7) Co-, 8) Ni-, 9–11) Cu-, 12–14) Pt- 15) and Au- 16) based ...glassy alloys exhibit unique properties such as high strength, large elastic strain limit, high ... See full document

... shows the diffusivities of Zr, which are calculated from the viscosity. The diffusivity of the glassy alloy shows the inflection point at the glass transition temperature, and the slope of the diffusivity of the ... See full document

... Impurities have a similar effect on growth as alloy­ ing additions do. Zirconium and its alloys have a relatively high concentration of impurities. Fong and Northwood (84) have analysed impurities in Zircaloy-4 ... See full document

... the liquid phases with a proper combinations of alloying elements, and a necessity of atomic rearrangement on a long-range scale for crystallization due to a difference between the local atomic configurations ... See full document

... alloy rod in Fig. 7. The fracture occurs along the maximum shear plane, which is declined by about 40 degrees to the direction of applied load (Fig. 7(a)), and the fracture surface consists mainly of a well-developed ... See full document