Microstructure, mechanical properties and thermal shock resistance of plasma sprayed nanostructured zirconia coatings

被引：131

作者：

Di Girolamo, G. ^{[1
]}

Marra, F. ^{[2
]}

Blasi, C. ^{[1
]}

Serra, E. ^{[3
]}

Valente, T. ^{[2
]}

机构：

[1] ENEA, UTTMATB, Brindisi Res Ctr, I-72100 Brindisi, Italy

[2] Univ Roma La Sapienza, UdR INSTM Roma La Sapienza, Dept Chem & Mat Engn, I-00184 Rome, Italy

[3] ENEA, UTTMAT, Casaccia Res Ctr, I-00123 Rome, Italy

来源：

CERAMICS INTERNATIONAL | 2011年 / 37卷 / 07期

关键词：

Hardness; Thermal shock resistance; ZrO2; Thermal applications; Plasma spraying; PARTIALLY-STABILIZED ZIRCONIA; BARRIER COATINGS; ELASTIC-MODULUS; MICROHARDNESS; ENGINES; POWDERS;

D O I：

10.1016/j.ceramint.2011.04.024

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

081705 [工业催化]; 082905 [生物质能源与材料];

摘要：

Nanostructured yttria stabilized zirconia (YSZ) coatings were deposited by Atmospheric Plasma Spraying (APS). X-ray diffraction (XRD) was used to investigate their phase composition, while scanning electron microscopy (SEM) was employed to examine their microstructure. The coatings showed a unique and complex microstructure composed of well-melted splats with columnar crystal structure, partially melted areas, which resembled the morphology of the powder feedstock, and equiaxed grains. Vickers microhardness of nanostructured zirconia coatings was similar to that of the conventional ones and strongly depended on the indentation load. Otherwise, a higher thermal shock resistance was found. This effect was addressed to the retention of nanostructured areas in coating microstructure and to the corresponding high porosity. (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：2711 / 2717

页数：7

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