公开(公告)号：DE69838341T2

公开(公告)日：2008-07-03

申请号：DE69838341

申请日：1998-09-23

Applicant: ROLLS ROYCE CORP

Inventor： CREECH GEORGE EDWARD ,  KORINKO PAUL STEPHEN ,  BARBER MICHAEL JOE ,  NAIK SUBHASH K

IPC: C25D13/02 ,  C23C10/58

Abstract: A method of controlling the final coating thickness of a diffused aluminide coating on a metal substrate. The method includes: (a) depositing an alumina-doped platinum-silicon powder onto a metal substrate, (b) heating the coated substrate to diffuse the platinum-silicon powder into the substrate and removing the undiffused scale, (c) depositing an aluminum-bearing powder onto the platinum-silicon-enriched substrate, and (d) heating the coated substrate to diffuse the aluminum-bearing powder into the substrate and removing the undiffused scale. The depositions are preferably done electrophoretically, in which case the Pt-Si deposition bath is doped with alumina or some other inert particulate. Alternatively, slurry deposition may be used. The method may also be used to deposit Pd-Si coatings onto metal substrates.

公开(公告)号：DE69838341D1

公开(公告)日：2007-10-11

申请号：DE69838341

申请日：1998-09-23

Applicant: ROLLS ROYCE CORP

Inventor： CREECH GEORGE EDWARD ,  KORINKO PAUL STEPHEN ,  BARBER MICHAEL JOE ,  NAIK SUBHASH K

IPC: C25D13/02 ,  C23C10/58

Abstract: A method of controlling the final coating thickness of a diffused aluminide coating on a metal substrate. The method includes: (a) depositing an alumina-doped platinum-silicon powder onto a metal substrate, (b) heating the coated substrate to diffuse the platinum-silicon powder into the substrate and removing the undiffused scale, (c) depositing an aluminum-bearing powder onto the platinum-silicon-enriched substrate, and (d) heating the coated substrate to diffuse the aluminum-bearing powder into the substrate and removing the undiffused scale. The depositions are preferably done electrophoretically, in which case the Pt-Si deposition bath is doped with alumina or some other inert particulate. Alternatively, slurry deposition may be used. The method may also be used to deposit Pd-Si coatings onto metal substrates.