Fragmentation of in-flight particles and its influence on the microstructure and mechanical property of YSZ coating deposited by supersonic atmospheric plasma spraying

被引：44
作者：
Bai, Y. [1 ]
Zhao, L. [1 ]
Wang, Y. [1 ]
Chen, D. [1 ]
Li, B. Q. [2 ]
Han, Z. H. [1 ]
机构：
[1] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
[2] Univ Michigan, Dept Mech Engn, Dearborn, MI 48128 USA
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 632卷
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Supersonic atmospheric plasma spraying; Reynolds number; Disk-shaped splats; Fine-lamellar coating; Mechanical property; THERMAL BARRIER COATINGS; ZIRCONIA COATINGS; ORIGINAL POWDERS; SHOCK BEHAVIOR; PART II; POROSITY; TOUGHNESS;
D O I：
10.1016/j.jallcom.2015.01.265
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
An experimental study was carried out in order to analyze the formation mechanism of the fine-lamellar structured yttria-stabilized zirconia (YSZ) coating during supersonic atmospheric plasma spraying (SAPS). Results showed that the in-flight particles melted and broke up through strong coupling with the supersonic plasma jet in thermal and momentum transfer, resulting in the deposited SAPS-particles being significantly smaller in size than either the original feedstock powders or the subsonic particles during the conventional atmospheric plasma spraying (APS). The fragmented particles travelling in a supersonic plasma jet had a lower Reynolds number and lower solidification time, leading to the formation of disk-shaped splats with lower thickness and surface roughness. This was crucial in reducing or eliminating the defects of as-sprayed coating and in forming the fine-lamellar structured SAPS-coating with a higher mechanical property. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：794 / 799
页数：6
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