Microstructural evolution in spray-formed and melt-spun Al85Nd5Ni10 bulk hybrid composites

被引：14

作者：

Guo, M. L. Ted

Tsao, Chi Y. A.

Huang, J. C.

Jang, J. S. C.

机构：

[1] Natl Cheng Kung Univ, Dept Mat Sci & Engn, Tainan 70101, Taiwan

[2] Natl Sun Yat Sen Univ, Inst Mat Sci & Engn, Kaohsiung 804, Taiwan

[3] I Shou Univ, Dept Mat Sci & Engn, Kaohsiung 840, Taiwan

来源：

INTERMETALLICS | 2006年 / 14卷 / 8-9期

关键词：

composites; nanostructured intermetallics; twinning; rapid solidification processing; electron microscopy; transmission;

D O I：

10.1016/j.intermet.2006.01.041

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Microstructure evolutions in the spray-formed and melt-spun Al85Nd5Ni10 alloys were studied. The spray forming process has shown to be capable of directly producing a bulk scale Al85Nd5Ni10 hybrid composite consisting of amorphous and nanostructured phases without the need of using an amorphous precursor. The spray-formed overspray flakes were partially amorphous, and the amorphous phase came from the undercooled liquid droplets upon deposition. The as-spray-formed deposit was completely crystallized due to the devitrification of the retained amorphous phase to nanoscale secondary crystals upon deposition. In the deposit and flake, the primary crystals were micro-scaled Al6NdNi2, and the secondary crystals devitrified from the amorphous phase during spray forming process were nanoscaled Al3Ni and Al6NdNi2, dispersed in nanoscaled alpha-Al matrix. The completely devitrified melt-spun ribbon composite consisted of secondary crystals Al3Ni, Al11Nd3 and Al6NdNi2 with nanoscale sizes, dispersed in the nanoscaled a-Al matrix. Deformation twins were observed in the primary Al6NdNi2 crystal in the as-spray-formed flake and deposit, but were not found in the secondary Al6NdNi2 crystals in the completely devitrified ribbon. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：1069 / 1074

页数：6

共 21 条

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