摘要
TiAl3-Al coating was deposited on orthorhombic Ti2AlNb alloy substrate by cold spraying with the mixture of pure Al and Ti as the feedstock powder at a fixed molar ratio of 3-1 when the spraying distance,gas temperature and gas pressure for the process were 10 mm,250 ℃ and 1.8 MPa,respectively.The as-sprayed coating was then subjected to heat treatment at 630 ℃ in argon atmosphere for 5 h at a heating rate of 3 ℃/min and an argon gas flow rate of 40 mL/min.The obtained TiAl3-Al composite coating is about 212 μm with a density of 3.16 g/cm3 and a porosity of 14.69% in general.The microhardness and bonding strength for the composite coating are HV525 and 27.12 MPa.
TiAl3-Al coating was deposited on orthorhombic Ti2AlNb alloy substrate by cold spraying with the mixture of pure Al and Ti as the feedstock powder at a fixed molar ratio of 3：1 when the spraying distance, gas temperature and gas pressure for the process were 10 mm, 250℃ and 1.8 MPa, respectively. The as-sprayed coating was then subjected to heat treatment at 630 ℃ in argon atmosphere for 5 h at a heating rate of 3℃/min and an argon gas flow rate of 40 mL/min. The obtained TiAl3-Al composite coating is about 212 μm with a density of 3.16 g/cm^3 and a porosity of 14.69% in general. The microhardness and bonding strength for the composite coating are HV525 and 27.12 MPa.
出处
《中国有色金属学会会刊：英文版》
EI
CSCD
2009年第4期879-882,共4页
Transactions of Nonferrous Metals Society of China
