High-Speed Rubbing Behavior of Abrasive Coating Coated on Titanium Alloy Blade Tips  

作　　者：Wenshuang Gu Shuai Yang Shiyi Zhang Zhiliang Pei Weihai Xue Deli Duan Jun Gong Chao Sun 

机构地区：[1]Shi-Changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang,110016,China [2]School of Materials Science and Engineering,University of Science and Technology of China,Shenyang,110016,China

出　　处：《Acta Metallurgica Sinica(English Letters)》2024年第4期749-762,共14页金属学报（英文版）

基　　金：supported by the National Science and Technology Major Project(2017-VII-0012-0108).

摘　　要：In aero-engines, abrasive coatings are typically utilized to protect the blade tip from excessive wear caused by the harder abradable sealing coating and thereby improve the sealing performance of engines. Therefore, a Ni/cBN abrasive coating was prepared on titanium alloy using electrodeposition. The high-speed rubbing tests with a linear velocity of 350 m/s and different incursion rates were performed to investigate the effect of the Ni/cBN abrasive coating on the wear behavior against NiCrAl/diatomite seal coating. Results showed that melting wear and adhesive transfer occurred on the bare blades, causing the bare blade to suffer excessive wear. While the Ni/cBN abrasive coating exhibited superior wear resistance and cutting performance. The cBN grits pullout, the abrasion of Ni matrix and transfer of seal coating to the cBN grits were the main wear mechanism of the Ni/cBN abrasive coating. Additionally, it was found that the relationship between the incursion rate and high-speed rubbing behavior is quite different for the bare blade and Ni/cBN coating. The reason for the difference in wear behavior of bare blade and Ni/cBN coating at different incursion rates was discussed in detail.

关 键 词：Gas turbine sealing Abrasive coating High-speed rubbing Material transfer Abradable coating 

分 类 号：TG174.4[金属学及工艺—金属表面处理]