MULTYLAYER THICKENING MATERIAL Russian patent published in 1994 - IPC

FIELD: turbo-machine engineering. SUBSTANCE: material has the following composition, wt. -% : working layer: zirconium dioxide stabilized with 5-10 wt. -% yttrium oxide 80-95; boron nitride or/and graphite 5-20; the first intermediate layer: nichrome with 18-22 wt.-% chrome 10-40; zirconium dioxide stabilized with 7-12 wt.-% yttrium oxide 60-90; the second intermediate layer: nichrome with 18-22 wt.-% chrome 60-90; zirconium dioxide stabilized with 7-12 wt.-% yttrium oxide 10-40. Ration of thickness of working, first and second intermediate layers is 3:(1-2):(1-2), respectively. Properties of material: abradability is increased by 17-52%, cohesion strength with backing - by 18-41%, corrosion strength - by 20-47% and more. EFFECT: enhanced quality of material. 2 tbl