TY - JOUR AU - Mohamad, Wan Farhana AU - Khan, Amir Azam AU - Ahmad, Faiz AU - Yassin, Abdullah PY - 2020/06/22 Y2 - 2024/03/28 TI - Phase analysis and microstructure study of sintered Ni-Cr composites containing MoS2, Ag and CaF2 additives as solid lubricants JF - Journal of Mechanical Engineering and Sciences JA - J. Mech. Eng. Sci. VL - 14 IS - 2 SE - Article DO - 10.15282/jmes.14.2.2020.02.0514 UR - https://journal.ump.edu.my/jmes/article/view/1749 SP - 6548 - 6556 AB - <p>Ni-Cr based composites with and without the addition of solid lubricants (MoS<sub>2</sub>, Ag and CaF<sub>2</sub>) were prepared by powder metallurgy method. The samples were sintered at different temperatures (1000<sup>o</sup>C, 1100<sup>o</sup>C and 1200<sup>o</sup>C) under controlled atmosphere and various holding times. The physical properties such as sintered density, relative density and porosity were studied. The microstructures and phase studies of the Ni-Cr based composites were conducted using Scanning Electron Microscope (SEM) and X-Ray Diffraction Analysis (XRD) while the hardness of the composites was measured by the Vickers Micro Hardness Tester. The results revealed that as the sintering temperature was increased, the sintered density, relative density and hardness also increased while the porosity was reduced. At the sintering temperature of 1200<sup>o</sup>C, the relative density reached its maximum value. SEM and XRD analysis confirmed the existence of MoS<sub>2</sub> and Ag in sintered samples. MoS<sub>2</sub> and Ag were not mainly dissolved and/or decomposed even after sintering at 1200<sup>o</sup>C</p> ER -