Ultrasonic transducers from thermal sprayed lead-free piezoelectric ceramic coatings for in-situ structural monitoring for pipelines

2019 ◽  
Vol 28 (7) ◽  
pp. 075031 ◽  
Author(s):  
Shifeng Guo ◽  
Lei Zhang ◽  
Shuting Chen ◽  
Chee Kiang Ivan Tan ◽  
Kui Yao
Keyword(s):  
Piezoelectric Ceramic ◽  
Ceramic Coatings ◽  
Ultrasonic Transducers ◽  
Lead Free ◽  
Structural Monitoring

Lead-Free Piezoelectric Ceramic Coatings Fabricated by Thermal Spray Process

2017 ◽  
Vol 64 (11) ◽  
pp. 1758-1765 ◽  
Author(s):  
Kui Yao ◽  
Shuting Chen ◽  
Kun Guo ◽  
Chee Kiang Ivan Tan ◽  
Meysam Sharifzadeh Mirshekarloo ◽  
...  
Keyword(s):  
Thermal Spray ◽  
Piezoelectric Ceramic ◽  
Ceramic Coatings ◽  
Lead Free ◽  
Thermal Spray Process ◽  
Spray Process

In‐Situ Construction of Lead‐Free Perovskite Direct Z‐Scheme Heterojunction Cs 3 Bi 2 I 9 /Bi 2 WO 6 for Efficient Photocatalysis of CO 2 Reduction

Solar RRL ◽  
2020 ◽  
Author(s):  
Zhao-Lei Liu ◽  
Rui-Rui Liu ◽  
Yan-Fei Mu ◽  
You-Xiang Feng ◽  
Guang-Xing Dong ◽  
...  
Keyword(s):  
Lead Free

Mechanical Properties of Pyrolytic "SiOCN" Thin Coatings

1993 ◽  
Vol 308 ◽  
Author(s):  
Sandrine Bec ◽  
André Tonck ◽  
Jean-Luc Loubet
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Ceramic Coatings ◽  
Optical Observation ◽  
Thin Coatings ◽  
Polymer Precursors ◽  
Polymeric State

ABSTRACTPyrolysis of polymer precursors (polysilazane) is a technologically and economically interesting way to produce thin ceramic coatings. However, many cracks appear and decohesion occurs during pyrolysis when the ceramic coatings (SiOCN) are thicker than 0.5 micrometers. In order to understand these cracking phenomena, the coatings are mechanically characterized by nanoindentation at different stages of the pyrolysis heat treatment.During pyrolysis, the cracking temperature is detected by in-situ optical observation. The thickness of the coatings varies during pyrolysis from 3 micrometers at the polymeric state to 1 micrometer at the ceramic state. The coatings' properties, hardness and Young's modulus are evaluated after heat treatment, taking into account the substrate's influence. A large variation of these properties occurs at the cracking temperature. Both the hardness and the Young's modulus are multiplied by a factor of 10. By analysing these results, we show that cracking is correlated with the evolution of the coatings' mechanical properties during the transformation.

KNN–NTK composite lead-free piezoelectric ceramic

2014 ◽  
Vol 116 (15) ◽  
pp. 154104 ◽  
Author(s):  
T. Matsuoka ◽  
H. Kozuka ◽  
K. Kitamura ◽  
H. Yamada ◽  
T. Kurahashi ◽  
...  
Keyword(s):  
Piezoelectric Ceramic ◽  
Lead Free
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