MOHAMAD, W. F.; KHAN, A. A.; AHMAD, F.; YASSIN, A. Phase analysis and microstructure study of sintered Ni-Cr composites containing MoS2, Ag and CaF2 additives as solid lubricants. Journal of Mechanical Engineering and Sciences, v. 14, n. 2, p. 6548 - 6556, 22 jun. 2020.