Paper Title:
Microstructure Characteristics of Spray-Formed and Melt-Spun Al85Nd5Ni10 and Al89La6Ni5 Bulk Hybrid Composites
  Abstract

The microstructure characteristics of the spray-formed and melt-spun Al85Nd5Ni10 and Al89La6Ni5 alloys were studied. The spray forming process was demonstrated to produce a bulk scale hybrid composite consisting of amorphous and nanostructured phases directly without the need of an amorphous precursor. The spray-formed Al89La6Ni5 deposit (~1 mm in thickness) were partially amorphous, and the amorphous phase came from the undercooled liquid droplets upon deposition. The as-spray-formed Al85Nd5Ni10 deposit (~20 mm in thickness) was completely crystallized due to the devitrification of the retained amorphous phase to nano-scale secondary crystals upon deposition. Primary crystals (~1 μm) are dispersed uniformly in the bulk spray-formed amorphous/or partial amorphous composites and many distinctive deformation twins also are observed in the crystals, however, not twins found in the corresponding completely devitrified ribbon. This is mainly because of the stirring and impacting force offered by high velocity droplets during spray forming and the mismatch of thermal expansion coefficient between primary crystals and adjacent amorphous matrix.

  Info
Periodical
Edited by
Di Zhang, Jingkun Guo and Chi Y. A. Tsao
Pages
1-6
DOI
10.4028/www.scientific.net/KEM.351.1
Citation
M.L.T. Guo, C. Y.A. Tsao, J.C. Huang, J. S.C. Jang, "Microstructure Characteristics of Spray-Formed and Melt-Spun Al85Nd5Ni10 and Al89La6Ni5 Bulk Hybrid Composites", Key Engineering Materials, Vol. 351, pp. 1-6, 2007
Online since
October 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Ming Xiang Pan, Wei Hua Wang, Yong Hu, De Qian Zhao, Yan Hui Zhao, Tatsuya Okada, W. Utsumi
53
Authors: Viktor Varyukhin, V.I. Tkatch, V.V. Maslov, Yan Beygelzimer, Sergey Synkov, V.K. Nosenko, S.G. Rassolov, Alexandr Synkov, V.I. Krysov, V.A. Mashira
Abstract:Amorphous Al86Ni6Co2Gd6 ribbons produced by melt-spinning processing were consolidated using twist extrusion (TE). Electrical resistance...
699
Authors: Victor I. Kolomytsev, M. Babanly, Alexandre Pasko, A.P. Shpak, Tetjana Sych, P. Ochin, Philippe Vermaut, Richard Portier, Eduard Cesari, D. Rafaja
Abstract:A series of multielementary AB-type shape memory alloys, quaternary (Ti,Hf)50(Ni,Cu)50 and quinary (Ti,Zr,Hf)50(Ni,Cu)50, have been produced...
113
Authors: S. Ahmadi, H.R. Shahverdi, S.S. Saremi
Chapter 14: Nanomaterials and Nanomanufacturing
Abstract:Nano- crystallization of Fe55Cr18Mo7B16C4 bulk amorphous alloy has been analyzed by X-...
3858
Authors: Y.B. Yuan, Rui Xiao Zheng, Su Jing Ge, Han Yang, Chao Li Ma
Abstract:Al86Ni7Y4.5Co1La1.5 (at.%) alloy powder was produced by argon gas atomization process....
281