EFFECTIVE-MEDIUM THEORY AND THE THERMAL-CONDUCTIVITY OF PLASMA-SPRAYED CERAMIC COATINGS

被引：33

作者：

BJORNEKLETT, A

HAUKELAND, L

WIGREN, J

KRISTIANSEN, H

机构：

[1] UNIV OSLO,DEPT PHYS,N-0316 OSLO,NORWAY

[2] VOLVO FLYGMOTOR AB,DIV AEROSP,S-46181 TROLLHATTAN,SWEDEN

来源：

JOURNAL OF MATERIALS SCIENCE | 1994年 / 29卷 / 15期

关键词：

D O I：

10.1007/BF00355967

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The thermal diffusivity of plasma-sprayed zirconium oxide-7% yttrium oxide and aluminium oxide-3% titanium oxide ceramic coatings was measured by using a periodic heat-flow method. Samples were prepared with different porosities thus allowing the thermal diffusivity as function of porosity to be determined. The samples were also impregnated with silicone oil so that the effect on the thermal diffusivity by replacing air with silicone oil in the pores could be determined. The experimental results were compared with effective medium theories representing three different microstructures: (1) a continuous ceramic matrix with dispersed pores, (2) a continuous ceramic matrix with continuously interconnected pores, (3) dispersed ceramic particles loosely bonded together. The latter two microstructures gave the best agreement between the experimental data and the theory.

引用

页码：4043 / 4050

页数：8

共 21 条

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