High Temperature Tantalum-MnO2 Capacitors: >200° C

2014 ◽  
Vol 2014 (HITEC) ◽  
pp. 000096-000102
Author(s):  
H. Jasso ◽  
K. Tempel ◽  
H. Bishop
Keyword(s):  
Development Process ◽  
New Technologies ◽  
Statistical Data ◽  
State Of The Art ◽  
Advanced Technology ◽  
Advanced Materials ◽  
Maximum Temperature ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Non Destructive

For years, the Tantalum SMD MnO2 Capacitor, in its solid-state structure, was typically rated with a maximum temperature rating of 125°C. The introduction of advanced technology, some time ago, allowed increasing the maximum working temperature to 150°C, 175°C and 200 °C respectively. Now, with the introduction of more advanced materials, such as carbon and silver, and the implementation of state of the art processes such as Nickel platting, optimizing chemical impurity (F-Tech) and a non-destructive testing technique (SBDS), the temperature range capability of Tantalum SMD MnO2 Capacitor can be extended to more than 200°C. This paper will provide the current results obtained during the development process of new T501 series (>200°C), parametric and statistical data are shown for each tests performed. A discussion of the advantages related to the use of these new technologies is included. The path forward to get a final qualification for this product is also discussed. Potential application areas for this new Tantalum SMD MnO2 series are explored in the latter stages of this presentation.

Increasing the Safety of Operation of Industrial Technical Systems from the Composite Materials by Predicting Their Life on the Basis of New Methods of Non-Destructive Control and Deep Neural Networks

2021 ◽  
pp. 7-12
Author(s):  
S.O. Kozelskaya ◽  
Keyword(s):  
Neural Network ◽  
Neural Networks ◽  
Composite Materials ◽  
Service Life ◽  
New Technologies ◽  
Preliminary Training ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
New Methods ◽  
Non Destructive

The problem is considered related to increase of the operational safety of industrial facilities made of composite materials by means of an a priori assessment of the maximum service life. Two tasks are being solved: development of the new methods and means of non-destructive testing allowing to identify the defects that appear in the process of testing products with various loads and in the process of their operation; development of the new methods and means for assessing service life of the products based on the results of non-destructive testing. The first problem is being solved by the development of optical-thermographic non-destructive testing, including the technologies of ultrasonic thermotomography and electric force thermography, which determine the state of the object by dynamic temperature fields and optical control technology based on the fiber-optic sensors that measure the amount of material internal deformation under a force effect on the structure. Solution to the second problem is based on the use of neural network analysis (artificial neural networks) for assessment and prediction of the service life using the results of non-destructive testing with preliminary training of the neural network. An estimate was obtained by the experimental studies related to the error in determining the products service life, which is 12.6 %. The implementation of the proposed approach will allow to create the new technologies for predicting the service life of elements and structures made of composite materials using the results of non-destructive testing, which will provide an additional opportunity for developing practical recommendations on the confirmation or extension of the service life and improvement of safety for structures operation.

A Review of Acoustic Emission Technique for Machinery Condition Monitoring: Defects Detection & Diagnostic

2012 ◽  
Vol 229-231 ◽  
pp. 1476-1480 ◽  
Author(s):  
Salah M. Ali Al-Obaidi ◽  
M. Salman Leong ◽  
R.I. Raja Hamzah ◽  
Ahmed M. Abdelrhman
Keyword(s):  
Acoustic Emission ◽  
Condition Monitoring ◽  
State Of The Art ◽  
The State ◽  
Non Destructive Testing ◽  
Testing Methods ◽  
Acoustic Emission Technique ◽  
Destructive Testing ◽  
Machinery Condition Monitoring ◽  
Non Destructive

Acoustic emission (AE) measurements are one of many non-destructive testing methods which had found applications in defects detection in machines. This paper reviews the state of the art in AE based condition monitoring with particular emphasis on rotating and reciprocating machinery applications. Advantages and limitations of the AE technique in comparison to other condition monitoring techniques in detecting common machinery faults are also discussed.

scholarly journals Non-Destructive Testing Applications for Steel Bridges

2021 ◽  
Vol 11 (20) ◽  
pp. 9757
Author(s):  
Seyed Saman Khedmatgozar Dolati ◽  
Nerma Caluk ◽  
Armin Mehrabi ◽  
Seyed Sasan Khedmatgozar Dolati
Keyword(s):  
New Technologies ◽  
Steel Bridges ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Civil Infrastructures ◽  
Advantages And Disadvantages ◽  
Increasing Demand ◽  
Available Information ◽  
Periodic Inspections ◽  
Non Destructive

The growing population and increasing demand for surface transportation have highlighted the importance of maintaining safe and reliable civil infrastructures for daily use. Among all civil infrastructures, bridges are one of the most important elements in the transportation system. As such, to prevent any failures caused by aging and environmental impacts, bridges require periodic inspections. This becomes even more critical due to climate change and its effect on bridges, especially in the coastal regions. Most of the inspections conducted incorporate the visual type of evaluation due to its simplicity. However, with the current developments in new technologies, there is a need for more advanced techniques of structural health monitoring (SHM) methods to be incorporated in the maintenance programs for more accurate and efficient surveys. In this paper, non-destructive testing (NDT) methods applicable to steel bridges are reviewed, with a focus on methods applicable to local damage detection. Moreover, the methodology, advantages and disadvantages, and up-to-date research on NDT methods are presented. Furthermore, the application of novel NDT techniques using innovative sensors, drones, and robots for the rapid and efficient assessment of damages on small and large scales is emphasized. This study is deemed necessary as it compiles in one place the available information regarding NDT methods for in-service steel bridges. Access to such information is critical for researchers who intend to work on new or improved NDT techniques.

scholarly journals Embedded Fiber Sensors to Monitor Temperature and Strain of Polymeric Parts Fabricated by Additive Manufacturing and Reinforced with NiTi Wires

Sensors ◽  
2020 ◽  
Vol 20 (4) ◽  
pp. 1122 ◽  
Author(s):  
Micael Nascimento ◽  
Patrick Inácio ◽  
Tiago Paixão ◽  
Edgar Camacho ◽  
Susana Novais ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Optical Fiber ◽  
Thermoplastic Composites ◽  
Maximum Temperature ◽  
Mechanical Stimuli ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Joule Effect ◽  
Niti Wires ◽  
Non Destructive

This paper focuses on three main issues regarding Material Extrusion (MEX) Additive Manufacturing (AM) of thermoplastic composites reinforced by pre-functionalized continuous Nickel–Titanium (NiTi) wires: (i) Evaluation of the effect of the MEX process on the properties of the pre-functionalized NiTi, (ii) evaluation of the mechanical and thermal behavior of the composite material during usage, (iii) the inspection of the parts by Non-Destructive Testing (NDT). For this purpose, an optical fiber sensing network, based on fiber Bragg grating and a cascaded optical fiber sensor, was successfully embedded during the 3D printing of a polylactic acid (PLA) matrix reinforced by NiTi wires. Thermal and mechanical perturbations were successfully registered as a consequence of thermal and mechanical stimuli. During a heating/cooling cycle, a maximum contraction of ≈100 µm was detected by the cascaded sensor in the PLA material at the end of the heating step (induced by Joule effect) of NiTi wires and a thermal perturbation associated with the structural transformation of austenite to R-phase was observed during the natural cooling step, near 33.0 °C. Regarding tensile cycling tests, higher increases in temperature arose when the applied force ranged between 0.7 and 1.1 kN, reaching a maximum temperature variation of 9.5 ± 0.1 °C. During the unload step, a slope change in the temperature behavior was detected, which is associated with the material transformation of the NiTi wire (martensite to austenite). The embedded optical sensing methodology presented here proved to be an effective and precise tool to identify structural transformations regarding the specific application as a Non-Destructive Testing for AM.

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