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1. DE000019604470 - Preparation of silicon-rich surfaces on alloys

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Office
Germany
Application Number 19604470
Application Date 09.02.1996
Publication Number 000019604470
Publication Date 17.04.1997
Publication Kind C1
IPC
C23C 10/44
CCHEMISTRY; METALLURGY
23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
10Solid state diffusion of only metal elements or silicon into metallic material surfaces
28using solids, e.g. powders, pastes
34Embedding in a powder mixture, i.e. pack cementation
36only one element being diffused
44Siliconising
CPC
C23C 10/44
CCHEMISTRY; METALLURGY
23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
10Solid state diffusion of only metal elements or silicon into metallic material surfaces
28using solids, e.g. powders, pastes
34Embedding in a powder mixture, i.e. pack cementation
36only one element being diffused
44Siliconising
Applicants DECHEMA
Inventors RAHMEL ALFRED PROF DR
SCHUETZE MICHAEL DR ING
BRUNS CLAAS DIPL ING
SCHORR MONIKA
Title
(DE) Verfahren zur Herstellung eines siliciumreichen, hochtemperaturbeständigen und korrosionsfesten Überzugs
(EN) Preparation of silicon-rich surfaces on alloys
Abstract
(DE) Gegenstand der Erfindung ist ein Verfahren, das zu einer deutlichen Erhöhung der Hochtemperaturkorrosionsbeständigkeit von Legierungen auf der Basis der intermetallischen Phasen Ti3Al und TiAl führt. Das Verfahren beruht darauf, daß ein Si-reicher Überzug auf die Legierungen aufgebracht wird, der die Bildung schützender SiO2- und/oder Al2O3-reicher Oxiddeckschichten ermöglicht.
(EN)

Preparation of silicon-rich surface zones on alpha2-Ti3Al and nu-TiAl alloys, comprises calcining the alloys in a vacuum with titanium chips and parts of silicon dioxide at 900-1150 deg C.
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