EP 1706518 A1 20061004 - PROTECTIVE LAYER FOR AN ALUMINIUM-CONTAINING ALLOY FOR USING AT HIGH TEMPERATURES, AND METHOD FOR PRODUCING ONE SUCH PROTECTIVE LAYER
Title (en)
PROTECTIVE LAYER FOR AN ALUMINIUM-CONTAINING ALLOY FOR USING AT HIGH TEMPERATURES, AND METHOD FOR PRODUCING ONE SUCH PROTECTIVE LAYER
Title (de)
SCHUTZSCHICHT FUR EINE ALUMINIUMHALTIGE LEGIERUNG FUR DEN EINSATZ BEI HOHEN TEMPERATUREN, SOWIE VERFAHREN ZUR HERSTELLUNG EINER SOLCHEN SCHUTZSCHICHT
Title (fr)
COUCHE DE PROTECTION D'UN ALLIAGE CONTENANT DE L ALUMINIUM A DES FINS D'UTILISATION A DES TEMPERATURES ELEVEES ET PROCEDE DE PRODUCTION DE CETTE COUCHE DE PROTECTION
Publication
Application
Priority
- DE 2004002570 W 20041120
- DE 102004002946 A 20040121
Abstract (en)
[origin: WO2005071132A1] Alloys containing aluminium are characterised by an outstanding oxidation resistance at high temperatures, that is based on, inter alia, the formation of a thick and slow-growing aluminium oxide layer on material surfaces. If the formation of the aluminium oxide layer reduces the aluminium content of the alloy so far that a critical aluminium concentration is not reached, no other protective aluminium oxide layer can be formed. This leads disadvantageously to a very rapid breakaway oxidation, and the destruction of the component. This effect is stronger at temperatures above 800 °C due to the fact that, often at this point, metastable A1203 modifications, especially theta- or gamma-A1203, are formed instead of alpha-A1203 that is generally formed at high temperatures. The above-mentioned oxide modifications are disadvantageously characterised by significantly higher growth rates. The invention relates to methods whereby aluminium-containing alloys advantageously form an oxidic covering layer predominantly consisting of alpha-Al2O3, at a temperature higher than 800 °C, especially in the initial stage of oxidation, and thus have a significantly improved long-term behaviour.
IPC 8 full level
C23C 8/02 (2006.01); C23C 2/26 (2006.01); C23C 8/10 (2006.01); C23C 14/08 (2006.01)
CPC (source: EP US)
Citation (search report)
See references of WO 2005071132A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2005071132 A1 20050804; WO 2005071132 A8 20050915; AT E554195 T1 20120515; CN 100569990 C 20091216; CN 1906323 A 20070131; DE 102004002946 A1 20050811; EP 1706518 A1 20061004; EP 1706518 B1 20120418; JP 2007518881 A 20070712; JP 4636389 B2 20110223; US 2008245446 A1 20081009; US 7850791 B2 20101214
DOCDB simple family (application)
DE 2004002570 W 20041120; AT 04802781 T 20041120; CN 200480040809 A 20041120; DE 102004002946 A 20040121; EP 04802781 A 20041120; JP 2006549845 A 20041120; US 58608904 A 20041120