Tribological Behaviors of Ni_3Al Intermetallics with MoO_3 Multilayer Ribbon Crystal Prepared by Spark Plasma Sintering  

作　　者：Wenzheng Zhai Xiaoliang Shi Kang Yang Yuchun Huang Liping Zhou Wenlong Lu 

机构地区：[1]The State Key Laboratory of Digital Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology [2]School of Mechanical and Electronic Engineering, Wuhan University of Technology

出　　处：《Acta Metallurgica Sinica(English Letters)》2017年第6期576-584,共9页金属学报（英文版）

基　　金：financially supported by the National Basic Research Program of China (No. 2014CB046705);the National Natural Science Foundation of China (Nos. 51275370 and 51275192)2;the China Postdoctoral Science Foundation (2016M600586)

摘　　要：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 mm^3 N^-1 m^-1] are significantly reduced for NiaAl 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.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 mm^3 N^-1 m^-1] are significantly reduced for NiaAl 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.

关 键 词：INTERMETALLICS Tribologicai properties Powder metallurgy Microstructure Wear resistant 

分 类 号：TF125.9[冶金工程—粉末冶金]