from the conferences organized by TANGER Ltd. provisional website
In this paper, the effects of various production parameters on the microstructure, mechanical and tribological properties of TiB2-reinforced NiAl/Ni3Al intermetallic compound were investigated. The experimental results showed the possibility of producing sintered composites of NiAl/Ni3Al with 4 vol.% TiB2 by Spark Plasma Sintering. It was shown that satisfactory results had already been obtained during sintering at 1150 °C and a pressure of 16 MPa. The composites had a nearly theoretical density after sintering already at 1150 °C for 10 min. under pressure of 48 MPa. Applying these parameters also caused achieving the largest Young's modulus (ultrasonic test) and hardness (HV1). Optical microscopy, scanning electron microscopy and X-ray diffraction analysis were used to characterize produced samples. The distribution of alloying elements within intermetallic compound was determined by EDS. TiB2 reinforcing particles were evenly distributed in the matrix. Tribological tests were made by ball on disc process. The friction coefficient and wear rate of the composites were measured.Keywords: NiAl/Ni3Al composites, TiB2 reinforcing particles, tribological studies, spark plasma sintering
© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.