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Analysis of High Temperature Effects...

Bilgunde, Prathamesh N.

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Analysis of High Temperature Effects on Piezoelectric Based Ultrasonic Transducers.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Analysis of High Temperature Effects on Piezoelectric Based Ultrasonic Transducers./
作者:	Bilgunde, Prathamesh N.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2018,
面頁冊數:	190 p.
附註:	Source: Dissertation Abstracts International, Volume: 79-10(E), Section: B.
Contained By:	Dissertation Abstracts International79-10B(E).
標題:	Acoustics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10792053
ISBN:	9780438072879

Analysis of High Temperature Effects on Piezoelectric Based Ultrasonic Transducers.
Bilgunde, Prathamesh N.

Analysis of High Temperature Effects on Piezoelectric Based Ultrasonic Transducers. - Ann Arbor : ProQuest Dissertations & Theses, 2018 - 190 p.

Source: Dissertation Abstracts International, Volume: 79-10(E), Section: B.

Thesis (Ph.D.)--Iowa State University, 2018.

Under sodium viewing (USV) using ultrasonic pulse-echo techniques offers the potential for the inspection of generation IV, liquid sodium-cooled fast reactors (SFRs) at the hot stand-by temperature (260C). However, the harsh environment effects on the transducer reduce the ultrasonic signal strength which also limits the probability of detection (POD) of the defects.

ISBN: 9780438072879Subjects--Topical Terms:

879105
Acoustics.

Analysis of High Temperature Effects on Piezoelectric Based Ultrasonic Transducers.
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300 $a 190 p.
500 $a Source: Dissertation Abstracts International, Volume: 79-10(E), Section: B.
500 $a Adviser: Leonard J. Bond.
502 $a Thesis (Ph.D.)--Iowa State University, 2018.
520 $a Under sodium viewing (USV) using ultrasonic pulse-echo techniques offers the potential for the inspection of generation IV, liquid sodium-cooled fast reactors (SFRs) at the hot stand-by temperature (260C). However, the harsh environment effects on the transducer reduce the ultrasonic signal strength which also limits the probability of detection (POD) of the defects.
520 $a Current work presents a unified modeling and measurement-based methodology to analyze the high temperature effects on the transducer components. Resonance analysis-based characterization has shown that the conventional d 33 piezoelectric parameter is not a sufficient condition to estimate resonance characteristics of high temperature ultrasonic transducers. A full piezoelectric material matrix needs to be utilized in order to estimate high temperature performance. In seeking materials, BiScO3-PbTiO 3 (Bismuth Scandium oxide-lead titanate) is demonstrated to be the piezoelectric material that could potentially be used for hot stand-by mode (260C) inspection of SFRs.
520 $a However, a high temperature ultrasonic transducer is also a multi-layer system where the interaction of multiple acoustic layers is equally important as the temperature dependence of a single piezoelectric layer. A 3-layer problem was studied which demonstrated the thermal cycling effect on the interfaces, evident from the echo amplitudes and bandwidth of the frequency response up to 260 °C. A unique bi-modal resonance phenomenon was also found in the transducer due to interaction of the multiple acoustic layers.
520 $a Utilizing these insights, design, development and high temperature evaluation of several prototypes was performed in surrogate fluids. This resulted in an air-backed transducer using BS-PT piezoelectric material, nickel faceplate, and liquid acoustic coupling with silicone oil. The transducer demonstrated the ability for imaging regions of different thickness within the specimen, critical for USV capabilities in SFRs.
520 $a Current work also developed a cost effective, novel temperature compensated transfer function approach to predict POD at high temperature using room temperature experimental data. Such a model-assisted POD approach quantified effect of temperature dependence of PZT-5A material on POD near 200 °C. This approach could be extended for other high temperature transducer materials using a physics based-model and room temperature experimental data to estimate high temperature POD.
590 $a School code: 0097.
650 4 $a Acoustics. $3 879105
650 4 $a Aerospace engineering. $3 1002622
650 4 $a Nuclear engineering. $3 595435
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710 2 $a Iowa State University. $b Aerospace Engineering. $3 1023643
773 0 $t Dissertation Abstracts International $g 79-10B(E).
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792 $a 2018
793 $a English
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