Acta Metallurgica Sinica (English Letters) ›› 2017, Vol. 30 ›› Issue (6): 576-584.DOI: 10.1007/s40195-017-0531-5

• Orginal Article • Previous Articles     Next Articles

Tribological Behaviors of Ni3Al Intermetallics with MoO3Multilayer Ribbon Crystal Prepared by Spark Plasma Sintering

Wenzheng Zhai1,2, Xiaoliang Shi2, Kang Yang2, Yuchun Huang2, Liping Zhou1, Wenlong Lu1   

  1. 1.The State Key Laboratory of Digital Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
    2.School of Mechanical and Electronic Engineering, Wuhan University of Technology, Wuhan 430070, China
  • Received:2017-02-18 Revised:2017-02-18 Online:2017-06-30 Published:2017-08-25

Abstract:

This study reports that small amounts of MoO3 multilayer ribbon crystal (MoO3 MLRC) in Ni3Al intermetallics showed the decreased friction coefficients and improved wear resistance at different contact loads. Specifically, the friction coefficients (0.32-0.34) and wear rates [(2-4) × 10-5 mm3 N-1 m-1] are significantly reduced for Ni3Al at 2-8 N. A possible explanation for the friction and wear reduction is that MoO3 MLRC as a multilayer material shears easily in the tribo-layer during the sliding contact, and provides low friction. In addition, this MoO3 MLRC with excellent bending strength is found to dissipate shear stress and suppress severe plastic deformation under a cyclic stress, thus drastically improving wear resistance of Ni3Al.

Key words: Intermetallics, Tribological properties, Powder metallurgy, Microstructure, Wear resistant