THERMAL-DIFFUSIVITY OF PLASMA-SPRAYED TUNGSTEN COATINGS

被引：19

作者：

MOREAU, C ^{[1
]}

FARGIERRICHARD, P ^{[1
]}

STJACQUES, RG ^{[1
]}

CIELO, P ^{[1
]}

机构：

[1] INST NATL RECH SCI ENERGIE & MAT, VARENNES J3X 1S2, PQ, CANADA

来源：

SURFACE & COATINGS TECHNOLOGY | 1993年 / 61卷 / 1-3期

关键词：

D O I：

10.1016/0257-8972(93)90204-2

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Refractory metals such as tungsten and molybdenum are currently considered as potential materials for the plasma-exposed divertor surfaces in future tokamak reactors. Tungsten and tungsten alloys are of interest owing to their low sputtering yield and good resistance to chemical erosion by hydrogen compared with carbon-based materials. In the present paper, the influence of the spraying parameters on the thermal diffusivity of tungsten coatings plasma sprayed on copper coupons was investigated. Experiments were carried out using a Taguchi fractional factorial approach, and the thermal diffusivity of plasma-sprayed coatings was determined using the flash method. The results show that the spraying atmosphere is the dominant factor affecting the coating thermal diffusivity; the gun transverse velocity and the powder feed rate have a smaller influence. The arc gas and power were found to have no significant effect on the thermal diffusivity of the sprayed coatings.

引用

页码：67 / 71

页数：5

共 28 条

[1]

ABRAM KR, 1991, THERMAL SPRAY RESEARCH AND APPLICATIONS, P655

[2]

BOIRELAVIGNE S, 1993, IN PRESS P INT S DEV

[3]

BORDEAUX F, 1991, HIGH TEMP HIGH PRESS, V49, P50

[4]

Brandt R., 1981, High Temperatures - High Pressures, V13, P79

[5]

BROOKS JN, 1988, J NUCL MATER, V176, P267

[6] THE WETTING OF SOLIDS BY MOLTEN METALS AND ITS RELATION TO THE PREPARATION OF METAL-MATRIX COMPOSITES [J].

DELANNAY, F ;

FROYEN, L ;

DERUYTTERE, A .

JOURNAL OF MATERIALS SCIENCE, 1987, 22 (01) :1-16

[7]

FARGIERRICHARD P, 1992, IMI92RT236001302G NA

[8]

FAUCHAIS P, 1992, THERMAL SPRAY COATINGS : PROPERTIES, PROCESSES AND APPLICATIONS, P205

[9] PLASMA FACING MATERIALS [J].

GAUSTER, WB .

NUCLEAR FUSION, 1990, 30 (09) :1897-1904

[10]

Gitzhofer F., 1985, High Temperatures - High Pressures, V17, P563

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