| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1575984 | Materials Science and Engineering: A | 2013 | 9 Pages |
Abstract
Graphene NanoPlatelets (GNP) reinforced tantalum carbide composites are synthesized by spark plasma sintering (SPS) at processing conditions of 1850 °C and 80-100 MPa. The GNP addition enhances the densification of TaC-GNP composites to 99% theoretical density, while reducing the grain size by over 60% through grain wrapping mechanism. Survival and structure retention of GNP is confirmed through scanning electron microscopy and micro-Raman spectroscopy. Nanoindentation and high load (20-30 N) microindentation are utilized to evaluate elastic modulus and hardness. GNP improves fracture toughness of TaC by up to 99% through toughening mechanisms such as GNP bending, sheet sliding, cracking bridging, and crack deflection.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Andy Nieto, Debrupa Lahiri, Arvind Agarwal,