Influence of Microstructure on Thermal Properties of Axial Suspension Plasma-Sprayed YSZ Thermal Barrier Coatings

被引：47

作者：

Ganvir, Ashish ^{[1
]}

Curry, Nicholas ^{[1
]}

Markocsan, Nicolaie ^{[1
]}

Nylen, Per ^{[1
]}

Joshi, Shrikant ^{[1
]}

Vilemova, Monika ^{[2
]}

Pala, Zdenek ^{[2
]}

机构：

[1] Univ West, S-46186 Trollhattan, Sweden

[2] IPP, Prague, Czech Republic

来源：

JOURNAL OF THERMAL SPRAY TECHNOLOGY | 2016年 / 25卷 / 1-2期

关键词：

axial injection; columnar microstructure; porosity; suspension plasma spraying; thermal conductivity; thermal diffusivity; HEAT-TREATMENT; CONDUCTIVITY; DEPOSITION; EVOLUTION; SYSTEMS; PHASE; TBCS;

D O I：

10.1007/s11666-015-0355-7

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Suspension plasma spraying is a relatively new thermal spaying technique to produce advanced thermal barrier coatings (TBCs) and enables production of coatings with a variety of structures-highly dense, highly porous, segmented, or columnar. This work investigates suspension plasma-sprayed TBCs produced using axial injection with different process parameters. The influence of coating microstructure on thermal properties was of specific interest. Tests carried out included microstructural analysis, phase analysis, determination of porosity, and pore size distribution, as well as thermal diffusivity/conductivity measurements. Results showed that axial suspension plasma spraying process makes it possible to produce various columnar-type coatings under different processing conditions. Significant influence of microstructural features on thermal properties of the coatings was noted. In particular, the process parameter-dependent microstructural attributes, such as porosity, column density, and crystallite size, were shown to govern the thermal diffusivity and thermal conductivity of the coating.

引用

页码：202 / 212

页数：11

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