Flow machine with a ceramic abradable

Details Flow machine with a ceramic abradable Flow machine with a ceramic abradable

2007-05-29

2007-05-29

Look, Edward K. (Department: 3745)

Rotary kinetic fluid motors or pumps

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

Between blade edge and static part

C415S174400, C428S403000

Reexamination Certificate

active

11015144

ABSTRACT:
The flow machine is furnished with an abradable (10) made of a particle composite material. This so-called composite (1) contains granular core particles (2) of a ceramic material. The surfaces (20) of the granular core particles carry functional layers (22) which form an intermediate phase of the composite which is stable at a high operating temperature. The intermediate phase in this process has been produced in situ at least in part by a chemical reaction of a precursor material (22′) and material (21) of the granular core particles on the particle surfaces (20). Bonds (23) are formed between the granular core particles arranged in a porous composite by the intermediate phase. These bonds have a breaking characteristic for abradables.

REFERENCES:
patent: 4927714 (1990-05-01), Priceman
patent: 5543130 (1996-08-01), Tsuno et al.
patent: 5932356 (1999-08-01), Sileo et al.
patent: 10200803 (2003-07-01), None
patent: 0425827 (1990-10-01), None
patent: 19884631005 (1988-11-01), None

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