Synthesis of Al3BC from mechanically milled and spark plasma sintered Al-MgB2 composite materials

Kubota, Masahiro and Cizek, Pavel 2008, Synthesis of Al3BC from mechanically milled and spark plasma sintered Al-MgB2 composite materials, Journal of alloys and compounds, vol. 457, no. 1-2, pp. 209-215.

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Title Synthesis of Al3BC from mechanically milled and spark plasma sintered Al-MgB2 composite materials
Formatted title Synthesis of Al3BC from mechanically milled and spark plasma sintered Al-MgB2 composite materials
Author(s) Kubota, Masahiro
Cizek, Pavel
Journal name Journal of alloys and compounds
Volume number 457
Issue number 1-2
Start page 209
End page 215
Total pages 7
Publisher Elsevier
Place of publication Amsterdam, Netherlands
Publication date 2008-06
ISSN 0925-8388
1873-4669
Keyword(s) Al3BC
Al–MgB2
mechanical milling
spark plasma sintering
powder metallurgy
XRD
EDXS
solid-state reaction
Summary The aluminium-rich ternary aluminium borocarbide, Al3BC was synthesised for the first time by solid-state reactions occurring during heat treatments after mechanical milling (MM) of pure aluminium with 15 or 50 at% MgB2 powder mixtures in the presence of the process control agent (PCA).

The solid-state reactions in the Al–15 and 50 at% MgB2 composite materials occurred between the MMed powders and process control agent (PCA) after heating at 773–873 K for 24 h. The products of the solid-state reaction induced Al3BC, AlB2, γ-Al2O3 and spinel MgAl2O4. MM processing time and heating temperatures in the Al–15 and 50 at% MgB2 composite materials affected the selection of those intermetallic compounds. When MM processing time was increased for a given composition, the formation of the Al3BC compound started at lower heat treatment temperatures. However, when the amount of MgB2 was increased in the 4 h MM processing regime, the formation of the Al3BC compound during heating was suppressed. As a result of the solid-state reactions in MMed powders the hardness was observed to increase after heating at 573–873 K for 24 h.

The fully dense bulk nano-composite materials have been successfully obtained through the combination of the MM and spark plasma sintering (SPS) processes for the 4 h or 8 h MMed powders of the Al–15 at% MgB2 composite materials sintered under an applied pressure of 49 MPa at 873 K for 1 h.
Language eng
Field of Research 091207 Metals and Alloy Materials
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2007, Elsevier B.V.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30025777

Document type: Journal Article
Collection: Centre for Material and Fibre Innovation
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