|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Mechanical Behavior at the Nanoscale IV
||Mechanical Properties of Rapidly Solidified Ni5Ge3 Intermetallic
||Nafisul Haque, Robert F Cochrane, Andrew M Mullis
|On-Site Speaker (Planned)
The congruently melting, single phase intermetallic Ni<SUB>5</SUB>Ge<SUB>3</SUB> has been subject to rapid solidification via drop-tube processing wherein powders, with diameters between 850 – 150 μm, are produced. At cooling rates (850 – 150 μm diameter particles, 700 – 7800 K s<SUP>-1) the dominant solidification morphology, revealed after etching, is that of isolated plate & lath microstructure in an otherwise featureless matrix. Selected area diffraction analysis in the TEM reveals the plate & lath are a disordered variant of ε-Ni<SUB>5</SUB>Ge<SUB>3</SUB>, whilst the featureless matrix is the ordered variant of the same compound. Microvicker hardens test result shows that mechanical properties improve as decreasing the particle size from 850 to 150 μm on the consequence of increasing the cooling rate. Moreover, featureless matrix (ordered) region shows higher hardness as compare to isolated plate & lath microstructure.
||Planned: Supplemental Proceedings volume