In view of the technological importance of this ternary system in the development of high-temperature alloys, magnetic materials, and shape memory devices, it has been investigated experimentally a number of times. Many reviews and updates have also appeared in the last two decades [1988Ray, 1992Bud, 1994Rag, 1995Vil, 2005Cac, 2005Rag, 2006Ele, 2006Rag]. For a recent detailed summary, the reader is referred to the updated version of [1992Bud] by [2005 Cac] and the review of [2006Ele]. [2006Ele] presented assessed experimental information on phase relationships and on thermochemical data, and Calphad-type/CVM calculations. Recently, [2007Chu] reinvestigated the Al-rich region and constructed an isothermal section at 850 deg C, five vertical sections and a complete liquidus projection for this region. This update will be limited to the new results of [2007Chu].
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