Ultrahigh-temperature Nb-silicide-based composites

被引：322

作者：

Bewlay, BP

Jackson, MR

Zhao, JC

Subramanian, PR

Mendiratta, MG

Lewandowski, JJ

机构：

[1] GE Global Research Center, Niskayuna, NY 12309, K1-MB271, One Research Circle

[2] GE Global Research, Schenectady, NY 12309, Rm. MB223

[3] GE Global Research Center, Niskayuna, NY 12309, K1-MB239, One Research Circle

[4] GE Global Research Center, Schenectady

[5] UES Inc., Materials Research Division, Dayton, OH 45432-1894

[6] Case Western University, Dept. of Materials Science and Eng., Cleveland, OH 44106, Charles White Metallurgy Bldg.

来源：

MRS BULLETIN | 2003年 / 28卷 / 09期

关键词：

casting; composites; creep; extrusion; fatigue; jet engines; Nb silicide; niobium; oxidation; superalloys; turbines; ultrahigh-temperature materials;

D O I：

10.1557/mrs2003.192

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This article reviews the most recent progress in the development of Nb-silicide-based in situ composites for potential applications in turbine engines with service temperatures of up to 1350degreesC. These composites contain high-strength Nb silicides that are toughened by a ductile Nb solid solution. Preliminary composites were derived from binary Nb-Si alloys, while more recent systems are complex and are alloyed with Ti, Hf, W, B, Ge, Cr, and Al. Alloying schemes have been developed to achieve an excellent balance of room-temperature toughness, fatigue-crack-growth behavior, high-temperature creep performance, and oxidation resistance over a broad range of temperatures. Nb-silicide-based composites are described with emphasis on processing, microstructure and performance. Nb silicide composites have been produced using a range of processing routes, including induction skull melting, investment casting, hot extrusion, and powder metallurgy methods. Nb silicide composite properties are also compared with those of Ni-based superalloys.

引用

页码：646 / 653

页数：8

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