Abstract
This paper investigates the effects of carbon nanotubes (CNT) addition on the structure and mechanical properties of Ni 3 Al-xB (0.0 < x < 1.5 at%) intermetallic compound. Ni 3 Al-xB-1wt%CNT nanocomposite powders were first synthesized by mechanical alloying. Effects of CNT addition on the lattice strain and crystallite size of synthesized powders were investigated by means of X-ray diffraction (XRD) analysis. Scanning electron microscope (SEM) was used to study powder morphologies. Powders, synthesized by mechanical alloying, were then consolidated using spark plasma sintering (SPS), conducted at 950 °C under pressure 50 MPa. Microhardness and shear punch tests were employed to study the mechanical properties of sintered samples. Results show that CNT addition is accompanied by a decrease in crystallite size and a significant improvement of mechanical properties of Ni 3 Al-xB (0.0 < x < 1.5 at%) intermetallic compounds.
Original language | English |
---|---|
Pages (from-to) | 461-467 |
Number of pages | 7 |
Journal | Journal of Alloys and Compounds |
Volume | 788 |
DOIs | |
Publication status | Published - 2019 |
Keywords
- Ni3Al
- Carbon nanotubes
- Mechanical properties
- Spark plasma sintering
- Nanocomposite