Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 668, Issue -, Pages 208-214Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2016.05.053
Keywords
TiC-TiB2-Ni composite; Hot pressing; Microstructures; Mechanical properties
Categories
Funding
- National Natural Science Foundation of China [51471048, 51272039]
- National Science and Technology Major Project of China [2012ZX04003-061]
- Program for Liaoning Excellent Talents in University [LJQ2013023]
- Fundamental Research Funds for the Central Universities [N110402002, N130810003]
Ask authors/readers for more resources
A TiC-TiB2-Ni composite with different Ni contents was synthesized using a hot pressing method. XRD analyses showed that the TiC-TiB2-Ni composite mainly consisted of TiC and TiB2 phases, and a small amount of metal Ni was also detected except the uncertain peaks. SEM observations showed that TiB2 phases were homogeneously distributed on the TiC matrix and the Ni enriched area in white contrast uniformly distributed on the phase interface, grain boundaries between the TiB2 and TiC grains or the triple junctions among the grains. The Ni enriched area contained metal Ni and NiTi2 compound according to TEM analyses. The experimental results showed that with increasing the Ni content, the volume density of the TiC-TiB2-Ni composite increased, and the hardness, flexural strength and fracture toughness all first increased and then decreased. When the Ni content was 8%, the optimum hardness, flexural strength and fracture toughness of the TiC-TiB2-Ni composite was 18.8 GPa, 604 MPa and 8.9 MPa.m(1/2), respectively. (C) 2016 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available