Eutectic structures in the Ni-Co-Cr-Al system obtained by plasma spraying and by Bridgman growth

被引：12

作者：

Fritscher, K ^{[1
]}

机构：

[1] DLR German Aerosp Ctr, Inst Mat Res, D-51170 Cologne, Germany

来源：

JOURNAL OF CRYSTAL GROWTH | 2003年 / 250卷 / 3-4期

关键词：

metastable eutectic; plasma spraying; solidification reactions; unidirectional solidification; AlCoCrNi; NiCoCrAlY coating;

D O I：

10.1016/S0022-0248(02)02458-2

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Formation of a regular fibrous two-phase microstructure was found in low-pressure plasma spray (LPPS) deposited Ni-Co-Cr-Al-Y coatings by transmission electron microscopy and analyzed by energy dispersive spectroscopy. The structure is compared to aligned lamellar three-phase structures of an Ni-Co-Cr-Al alloy obtained on Bridgman growth under slow unidirectional solidification (UDS) conditions. The composition of the Ni-Co-Cr-Al alloy for UDS experiments has been identified by DTA. The conditions for the formation of both the LPPS and the UDS structures are discussed. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：546 / 557

页数：12

共 24 条

[1]

BARTH M, 1995, THESIS RUHR U BOCHUM

[2]

BOETTINGER W, 1985, 4 INT C RAP QUENCH M, P871

[3] THE EFFECT OF RAPID SOLIDIFICATION VELOCITY ON THE MICROSTRUCTURE OF AG-CU ALLOYS [J].

BOETTINGER, WJ ;

SHECHTMAN, D ;

SCHAEFER, RJ ;

BIANCANIELLO, FS .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1984, 15 (01) :55-66

[4]

CLINE HE, 1970, METALL TRANS, V1, P2907

[5] Why do EB-PVD NiCoCrAlY coatings oxidize faster than their LPPS counterparts? [J].

Fritscher, K ;

Leyens, C ;

Schulz, U .

HIGH TEMPERATURE CORROSION AND PROTECTION OF MATERIALS 5, PTS 1 AND 2, 2001, 369-3 :703-710

[6]

FRITSCHER K, 1987, UNPUB

[7]

FRITSCHER K, 1997, HIGH TEMP MAT SCI, V38, P125

[8] STRUCTURE FORMATION AND INTERDIFFUSION IN VACUUM PLASMA SPRAYED CONICRALY COATINGS ON IN738LC [J].

GUDMUNDSSON, B ;

JACOBSON, BE .

MATERIALS SCIENCE AND ENGINEERING, 1988, 100 :207-217

[9]

HENNE R, 1986, J HIGH TEMP HIGH PRE, V18, P223

[10]

HORNBOGEN E, 1985, 4 INT C RAP QUENCH M, P785

← 1 2 3 →