T. Xiong, Z. Bao, T. Li, K. Yang, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China; T. Sun, Z. Ding, Shenyang Liming Aero-Engine Group Corporation, Shenyang, China
As a novel promising technology, cold gas dynamic spray (CGDS) has attracted great attention from researchers and engineers due to its excellent advantages in spraying materials thermal sensitive or easy oxidized. Silver and copper are prominent for their attention-getting conductivities. In current study, silver-copper alloy powder was successfully deposited onto a certain kind of stainless steel and formed a functional seal coating. Optical and scanning electron microscopes were employed to observe the coating’s microstructure. Its mechanical properties, including microhardness and bonding strength, were determined respectively. At last, an interesting phenomenon of microstructure change induced by heat treatment was investigated either.
Summary: A novel technology was employed to cold spray Ag-Cu alloy powder which would be used in aero-spacing fields as seal coating. An interesting phenomenon (phase transformation during heat treatment procedure) was studied here.