Bulk nanostructure formation directly from the multicomponent alloy melt

Jian-Min Li, H.
January 2004
Applied Physics Letters;1/19/2004, Vol. 84 Issue 3, p347
Academic Journal
The first bulk homogeneous nanocrystalline Zr[sub 60]Al[sub 15]Ni[sub 10]Co[sub 15] (at. %) alloy prepared by melt casting without the amorphous matrix is reported. In this work, the complete grain refinement directly by solidification processing, when qualitatively compared to the previously reported nanocrystallization by postdevitrification of amorphous alloy solid precursors, produces nanograins that have a relatively narrower size range (7.4 nm in average) and are randomly oriented. The total inhomogeneous chemical affinity of the multicomponent alloy was proposed to thermodynamically favor the three-dimensional nanoscale nucleation from alloy melts. Clustering of different atoms in the ZrAlNiCo alloy occurs while the material is still in the molten state. © 2004 American Institute of Physics.


Related Articles

  • Preparation and characterisation of ultrafine amorphous alloy particles. Hu, Z.; Fan, Y.; Chen, Y. // Applied Physics A: Materials Science & Processing;1999, Vol. 68 Issue 2, p225 

    Abstract. Chemical preparation, characterisation, and properties are briefly reviewed for transition metal-metalloid ultrafine amorphous alloy particles (UAAP). Special attention is paid to the new solid-state chemical reaction method and the new systems, i.e. P-bearing and B-and-P-bearing...

  • Characterization of nanocrystalline Ni33Ze67 alloy. Liu, X.D.; Umemoto, M. // Journal of Applied Physics;2/1/1997, Vol. 81 Issue 3, p1103 

    Reports on the synthesis of nanocrystalline samples with grains via thermal crystallization of Ni33Zr67 amorphous alloy. Positron annihilation spectroscopy; Contribution of microtwin domain and the nature of constituent phases to microhardness in the present alloy system.

  • Evolution of nanoscale morphology on fracture surface of brittle metallic glass. Wang, G.; Wang, Y. T.; Liu, Y. H.; Pan, M. X.; Zhao, D. Q.; Wang, W. H. // Applied Physics Letters;9/18/2006, Vol. 89 Issue 12, p121909 

    The authors report the observations of periodic morphology evolution on fracture surface of a brittle metallic glassy ribbon, suggesting a wavy local stress intensity factor along the crack propagation. The authors find that the formation of nanoscale damage cavity structure is a common...

  • Formation of nanowaves in compressive fracture of a less-brittle bulk metallic glass. Shen, J.; Liang, W. Z.; Sun, J. F. // Applied Physics Letters;9/18/2006, Vol. 89 Issue 12, p121908 

    Formation of periodical fracture surface marks in the dynamic fracture can only be observed, mainly in ideally brittle amorphous materials and under mode I loading conditions. Here the authors report on the observation of elastic-wave patterns on nanoscale that form in the compressive fracture...

  • Pressure tunes atomic packing in metallic glass. Sheng, H. W.; Ma, E.; Liu, H. Z.; Wen, J. // Applied Physics Letters;4/24/2006, Vol. 88 Issue 17, p171906 

    By employing the state-of-the-art in situ high-pressure synchrotron x-ray measurements and ab initio modeling, we have resolved atomic-level packing details in a metallic glass as a function of pressure. We demonstrate pronounced changes in atomic size ratio (and correspondingly coordination...

  • PREPARATION AND STRUCTURAL CHARACTERIZATION OF RAPIDLY SOLIDIFIED Al-Si ALLOYS. Varga, B.; Fazakas, E.; Varga, L. K. // Bulletin of the Transilvania University of Brasov, Series I: Eng;2009, Vol. 2 Issue 51, p223 

    Rapidly solidified hypereutectic Al100-x-Six alloys (x = 12; 20; 40 wt.%) with cost effective minor additions (Ni, Ti, Fe and P) have been prepared and analysed. The increased cooling rate and the minor additives determine an expansion of the coupled growth area, which is displayed...

  • Magnetic properties of Nd–Fe–Ti–C–B nanocomposite magnets produced by spark plasma sintering method. Saito, Tetsuji // Journal of Applied Physics;4/15/2006, Vol. 99 Issue 8, p08B522 

    Amorphous melt-spun ribbons of a Nd9Fe73Ti4C1B13 alloy were consolidated into bulk materials by the spark plasma sintering method. The resultant bulk material was amorphous when the ribbons were consolidated at 773 K. The amorphous bulk material showed a low coercivity, as would be expected for...

  • Light-induced defects in hydrogenated amorphous silicon alloys. Skumanich, Andrew; Amer, Nabil M. // Applied Physics Letters;2/22/1988, Vol. 52 Issue 8, p643 

    The effect of light illumination on gap state absorption of hydrogenated amorphous silicon (a-Si:H) alloys has been investigated using photothermal deflection spectroscopy. The alloys studied were the large gap materials a-SiC:H and a-SiO:H and the narrow gap a-SiGe:H and a-Ge:H. The results...

  • Amorphous phase transition mechanism by the mechanical alloying of the Fe–W system. Shen, T. D.; Wang, K. Y.; Quan, M. X.; Wang, J. T. // Journal of Applied Physics;2/15/1992, Vol. 71 Issue 4, p1967 

    Studies the amorphous phase transition mechanism by the mechanical alloying of the iron and tungsten powders. Synthesis of amorphous alloys; Details on the experiment; Discussion on the results of the experiment.


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics