Tribological property and high temperature oxidation behavior of Ni-based alloy
(1.Department of Materials Science and Engineering,Nanjing University of Science and Technology, Nanjing 210094, China2.Department of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China))
Abstract: Ni-Cr based alloys were prepared by hot-pressing the mixture of strengthening phases Mo, Al, Ti, and lubricant phase MoS2. The hardness, tribological properties as well as the high temperature oxidation properties were evaluated, The results show that the strengthening phases can improve the mechanical properties of Ni-Cr based alloy obviously, and the wear and friction properties of Ni-based alloy with strengthening phase can be improved. Its friction coefficient and wear rate rubbed with Al2O3 ceramic disk are about 0.4 and 10 -14m3/（N·m）, respectively, and the oxidation process is mainly affected by Cr2O3.
Key words: Ni-Cr based alloys； strengthening phase； high temperature oxidation； friction and wear