Title of article
Abnormal crystallization in Al86Ni6Y4.5Co2La1.5 metallic glass induced by spark plasma sintering
Author/Authors
Li، نويسنده , , X.P. and Yan، نويسنده , , M. and Schaffer، نويسنده , , G.B. and Qian، نويسنده , , M.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2013
Pages
5
From page
69
To page
73
Abstract
Abnormal crystallization was observed in Al86Ni6Y4.5Co2La1.5 metallic glass powder at about 20 °C below its glass transition temperature (Tg, 271.5 °C) during spark plasma sintering (SPS). The crystallization product, identified to be a hexagonal-structured Al5Co2 phase, was not detected in the same powder when annealed in a differential scanning calorimeter (DSC). Nor was it detected in other Al-based metallic glasses of similar compositions which were annealed around their Tg temperatures by conventional heating. SPS is effective to introduce a unique nanometric intermetallic phase in the amorphous matrix. The abnormal crystallization is attributed to the high applied pressure and non-thermal effects of SPS.
Keywords
B. Phase transformation , A. Intermetallics , C. Sintering , B. Glasses , metallic
Journal title
Intermetallics
Serial Year
2013
Journal title
Intermetallics
Record number
1505693
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