A pseudo-alloy PS45/CuAl8 composite coating was sprayed on steel substrate by high-velocity activated arc spraying(HVAA)process.Its sliding wear behavior at room temperature was evaluated by M-2000 wear tester.For com...A pseudo-alloy PS45/CuAl8 composite coating was sprayed on steel substrate by high-velocity activated arc spraying(HVAA)process.Its sliding wear behavior at room temperature was evaluated by M-2000 wear tester.For comparison,a single CuAl8 coating was also prepared and tested under the same conditions.It is found that the pseudo-alloy composite coating consists ofα-Cu andγ-Ni metallic matrix phases together with homogenously distributed minor Al 2 O 3,Cr 2 O 3 oxide phases.Moreover,pseudo-alloy coating possesses much better sliding wear resistance than CuAl8 coating due to the enhanced hardness and microstructural homogenization.Fatigue wear and abrasive wear are responsible for the wear-down mechanism of the pseudo-alloy coating.展开更多
基金supported by Key Projects of the Guang-dong Provincial Science&Technology Program(Nos.2009A090100045 and 2010A090200077)Project of the Zhongshan Civic Science&Technology Program(No.20103A262)
文摘A pseudo-alloy PS45/CuAl8 composite coating was sprayed on steel substrate by high-velocity activated arc spraying(HVAA)process.Its sliding wear behavior at room temperature was evaluated by M-2000 wear tester.For comparison,a single CuAl8 coating was also prepared and tested under the same conditions.It is found that the pseudo-alloy composite coating consists ofα-Cu andγ-Ni metallic matrix phases together with homogenously distributed minor Al 2 O 3,Cr 2 O 3 oxide phases.Moreover,pseudo-alloy coating possesses much better sliding wear resistance than CuAl8 coating due to the enhanced hardness and microstructural homogenization.Fatigue wear and abrasive wear are responsible for the wear-down mechanism of the pseudo-alloy coating.
