TITLE:
Microstructure and Mechanical Properties of NiTi2-TiB Composite Fabricated by Spark Plasma Sintering
AUTHORS:
Masashi Yoshida, Hideo Shiraishi, Naoya Ikki
KEYWORDS:
Composite, Bending Strength, Vickers Hardness, TiB, NiTi2
JOURNAL NAME:
World Journal of Engineering and Technology,
Vol.3 No.3C,
October
22,
2015
ABSTRACT: Composites of NiTi2-TiB have been
fabricated using spark plasma sintering and mechanical properties have been investigated.
Dense specimens of monolithic NiTi2 have been obtained by the sintering at 950?C.
By the x-ray diffraction measurements it has been shown that NiTi2 co-exists
with TiB in equilibrium at 950?C. The bending strength of NiTi2-TiB composite
increases with increasing the volume fraction of TiB2 up to 60 vol%. The
maximum bending strength of 730 MPa has been obtained for NiTi2-60vol% TiB2. The
Vickers hardness also increases with increasing the volume fraction of TiB up
to 70% and the highest Vickers hardness of 1620 Hv has been obtained for NiTi2-70%TiB.