Method for thermal spraying of nanocrystalline coatings and mate

Details Method for thermal spraying of nanocrystalline coatings and mate Method for thermal spraying of nanocrystalline coatings and mate

1997-12-11

1999-08-17

Bareford, Katherine A.

Coating processes

Spray coating utilizing flame or plasma heat

29DIG39, C23C 404

Patent

active

059391464

ABSTRACT:
Nanocrystalline coating are prepared using a two step approach. First, the grain size of: micrometer sized powders is reduced to nanometer dimensions using high energy ball milling. This is undertaken using attritor mills. Second, the nanocrystalline powders are dried and introduced into the high velocity oxygen fuel (HVOF) process and produce a coating with refined microstructure. The finished coating can be several mm in thickness. In addition a three dimensional device can be spray formed.

REFERENCES:
patent: 3617358 (1971-11-01), Dittrich
patent: 4746468 (1988-05-01), Ozaki et al.
patent: 5395422 (1995-03-01), Schulz et al.

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