<p>Improved coating compositions are described for the protection of superalloys at elevated temperatures, particularly where Hf is absent from the substrate alloy. The coatings of the NiCrAlY or NiCoCrAlY type are significantly improved by the use of higher levels of yttrium. The preferred compositions are within the following range Element wt% Cr 10-35 Al 8-20 Y 11-30 Co 0-30 Ni Balance e</p>
申请公布号
DE3229285(C2)
申请公布日期
1988.11.24
申请号
DE19823229285
申请日期
1982.08.05
申请人
UNITED TECHNOLOGIES CORP., HARTFORD, CONN., US
发明人
DUVALL, DAVID SCOTT, COBALT, CONN., US;GUPTA, DINESH KUMAR, VERNON, CONN., US
