Microstructural evolution during heating of CNT/Metal Matrix Composites processed by Severe Plastic Deformation.

ABSTRACT: Carbon nanotube reinforced nickel matrix composites (Ni/CNT) with different CNT compositions were fabricated by solid state processing and subjected to severe plastic deformation (SPD) by means of high pressure torsion (HPT). A thorough study on the microstructural changes during heating and on the thermal stability was performed using differential scanning calorimetry (DSC), high temperature X-ray diffraction (HT-XRD) and electron backscattered diffraction (EBSD). Furthermore, the formation and dissolution of the metastable nickel carbide Ni₃C phase was evidenced by DSC and HT-XRD in composites, where sufficient carbon atoms are available, as a consequence of irreversible damage on the CNT introduced by HPT. Finally, it was shown that the composites exhibited an improved therma

SUBMITTER: Aristizabal K 

PROVIDER: S-EPMC6972703 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature