Title of article
Graphene NanoPlatelets reinforced tantalum carbide consolidated by spark plasma sintering
Author/Authors
Nieto، نويسنده , , Andy and Lahiri، نويسنده , , Debrupa and Agarwal، نويسنده , , Arvind، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2013
Pages
9
From page
338
To page
346
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.
Keywords
ceramics , fracture , Nanoindentation , Composites , Sintering
Journal title
MATERIALS SCIENCE & ENGINEERING: A
Serial Year
2013
Journal title
MATERIALS SCIENCE & ENGINEERING: A
Record number
2173866
Link To Document