Influence of Microstructure and Chemical composition on the Abradability of Nickel based abradable coatings

Tuesday, May 8, 2018: 3:45 PM
Exhibit Halls A-E (Gaylord Palms Resort )
Dr. Jianming Liu , Northeastern University, Shenyang, China
Prof. Yueguang Yu , Beijing General Research Institute of Mingning & Metellurgy Technology Group, Beijing, China
Mr. Tong Liu , Beijing General Research Institute of Mingning & Metellurgy Technology Group, Beijing, China
Mrs. Xuying Cheng , Beijing General Research Institute of Mingning & Metellurgy Technology Group, Beijing, China
Prof. Deming Zhang , Beijing General Research Institute of Mingning & Metellurgy Technology Group, Beijing, China
Abradability of a serial of nickel based abradable coatings rubbed to Superalloy blade or Ti2AlNb blade were tested under high temperature and high velocity conditions. The influence of coating microstructure and chemical composition on the abradability were analyzed. It was found that, Rockwell 15Y hardness is a good indicator of abradability for coatings with difference chemical compositions and microstructures. All coatings exhibited enhanced abradability at low incursion rates than at high incursion rates. Coating with fine filler and pores performed better at high incursion rates than those with coarse filler and pores. It is assumed that fine filler and pores can help releasing particles more readily than coarse ones before the microstructure is densified, as coating was rubbed at high incursion rates.
See more of: Oerlikon Metco Young Professionals Session
See more of: Young Professionals Session