|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Mechanical Characteristics and Application Properties of Metals and Non-metals for Technology: An EPD Symposium in Honor of Donato Firrao
||Young’s Modulus and Hardness of Metal Amorphous Nanocomposites (MANCS) Determined by Nanoindentation
||Yuval Krimer, Michael E. McHenry
|On-Site Speaker (Planned)
Metal amorphous nanocomposites (MANCs) are emerging materials offering lower losses at high frequencies than silicon steel and higher saturation inductions than amorphous metals. These materials can be crystallized under applied stress to induce magnetic anisotropy. Um et al. reports hardness obtained by nanoindentation in FINEMET (Fe<SUB>71.1</SUB>Si<SUB>18.5</SUB>B<SUB>6.3</SUB>Nb<SUB>3</SUB>Cu<SUB>1.1</SUB>) and NANOPERM (Fe<SUB>91</SUB>Zr<SUB>7</SUB>B<SUB>2</SUB>), with results correlated to volume fraction crystallized (VFC). However, no mechanical properties studies have been performed on emerging Co based materials. This study investigates the Young’s modulus and hardness of Co<SUB>74.6</SUB>Fe<SUB>2.7</SUB>Mn<SUB>2.7</SUB>Nb<SUB>4</SUB>Si<SUB>2</SUB>B<SUB>14</SUB>, as function of annealing temperature. Co<SUB>74.6</SUB>Fe<SUB>2.7</SUB>Mn<SUB>2.7</SUB>Nb<SUB>4</SUB>Si<SUB>2</SUB>B<SUB>14</SUB> shows Young’s modulus increase from 114 GPa as-cast to 118 GPa at 430 <SUP>o</SUP>C, and then decrease with higher annealing temperature to 79 GPa at 540 <SUP>o</SUP>C. Nanohardness increases from 12 GPa as-cast to 14 GPa at 430 <SUP>o</SUP>C, then decreases to 2 GPa at 540 <SUP>o</SUP>C. DSC measurements and prior work suggest that onset of crystallization occurs at 420 <SUP>o</SUP>C.
||Planned: Supplemental Proceedings volume