Gas turbine engine and method of producing the same

Details Gas turbine engine and method of producing the same Gas turbine engine and method of producing the same

2007-01-16

2007-01-16

Edgar, Richard A. (Department: 3745)

Rotary kinetic fluid motors or pumps

Bearing, seal, or liner between runner portion and static part

Between blade edge and static part

C415S200000, C277S360000

Reexamination Certificate

active

10763375

ABSTRACT:
A raw material powder having particle sizes of not more than 125 μm and preferably not more than 75 μm, such as a powder of an alloy of Co-32% Ni-21% Cr-7.5% Al-0.5% Y is thermally sprayed onto surfaces of shroud members of a shroud to form a coating. The high velocity oxygen-fuel thermal spray method is used as the thermal spray method. In the obtained coating, the porosity is 5% to 30% by volume and the oxygen content is not more than 2% by weight. In particular, when the raw material powder has particle sizes of about 40 μm, it is possible to obtain the coating which has an extremely small oxygen content of about 0.5% by weight.

REFERENCES:
patent: 5059095 (1991-10-01), Kushner et al.
patent: 6233822 (2001-05-01), Grossklaus et al.
patent: 2002/0197155 (2002-12-01), Howard et al.
patent: 2001-152803 (2001-06-01), None
patent: 2001-303904 (2001-10-01), None

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