Filters








2,880 Hits in 6.3 sec

A Past, Present, and Prospective Review on Microwave Nondestructive Evaluation of Composite Coatings

Wei Siang Teng, Muhammad Firdaus Akbar, Ghassan Nihad Jawad, Shin Yee Tan, Mohd Ilyas Sobirin Mohd Sazali
2021 Coatings  
In addition, the article includes a detailed review of several microwave NDT techniques and their benefits in evaluating composite coatings.  ...  Artificially intelligent techniques have greatly enhanced the reliability and accuracy of microwave NDT techniques.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/coatings11080913 fatcat:dmnsq7ygorc6hjoeszbpvj3qdm

Assessment of Delamination under Insulation using Ridge Waveguide

Muhammad F. Akbar, Nawaf H. M. M. Shrifan, Ghassan N. Jawad, Nor Ashidi Mat Isa
2022 IEEE Access  
In this paper, microwave nondestructive technique (NDT) is proposed for delamination detection and thickness estimation under dielectric insulation.  ...  Next, a time-domain reflectometry (TDR) technique-based inverse discrete Fourier transform is used to evaluate the complex reflection coefficients in terms of delamination's size and thickness estimation  ...  Recently, microwave OERW probe provides noticeable results in inspecting composite materials in terms of defect detection, sizing, and depth estimation, such as machine learning-based techniques [17]  ... 
doi:10.1109/access.2022.3163308 fatcat:d4zmfws2lzcm7lo45eet7kzqn4

A Review of Optical NDT Technologies

Yong-Kai Zhu, Gui-Yun Tian, Rong-Sheng Lu, Hong Zhang
2011 Sensors  
Among them, fibre optics features easy integration and embedding, electronic speckle focuses on whole-field high precision detection, infrared thermography has unique advantages for tests of combined materials  ...  , endoscopic technology provides images of the internal surface of the object directly, and terahertz technology opens a new direction of internal NDT because of its excellent penetration capability to  ...  Compared with other NDT techniques, THz imaging has unique advantages in the detection of internal defects for non-metallic material.  ... 
doi:10.3390/s110807773 pmid:22164045 pmcid:PMC3231750 fatcat:tsiu5ml25beqzf7ahhrrdwvkiq

Strength properties of preceramic brazed joints of a gold-palladium alloy with a microwave-assisted oven and gas/oxygen torch technique

Hyeongil Kim, Soni Prasad, Robert Dunford, Edward A. Monaco
2014 The Journal of prosthetic dentistry (Print)  
The effect of microwave brazing on the strength properties of dental casting alloys is not yet known.  ...  Purpose The purpose of this study was to compare the strength properties of preceramic brazed joints obtained by using a microwave oven and a conventional torch flame for a high noble alloy (Au-Pd).  ...  Based on the results of the current experiment, in a larger experiment, the microwave technique would outperform the torch technique on each measurement.  ... 
doi:10.1016/j.prosdent.2014.02.001 pmid:24656408 fatcat:za2w6jv5wvaolmpxkkil35dtoy

Research, reviews & patents

2005 III-Vs review  
It is expected that the nano-size powders will have a higher number of strained bonds/defects on the surface, which will affect the activation energy, thus the kinetics of the reaction.  ...  are intent on Improvements of AlGaN/GaN p-in UV sensors with graded AlGaN layer for the detection.  ... 
doi:10.1016/s0961-1290(05)71309-0 fatcat:uhawwndjvzgzfftsrtk2y3z3hu

Applications of Non-destructive Tests for Diagnosis of Heritage Buildings: Case Studies from Singapore and Malaysia

Chung Wan Wong
2019 Built heritage  
The paper discusses about a selection of case studies, demonstrating the application of various techniques for the identification of hidden details, defects and deterioration, and moisture detection.  ...  Common methods employed in projects in Singapore and Malaysia include the infrared thermography, ground penetrating radar, microwave moisture tomography and ultrasonic pulse echo tomography.  ...  Pulse Echo Tomography This technique is based on the detection and analysis of reflected ultrasonic pulse through dry contact transducers.  ... 
doi:10.1186/bf03545732 fatcat:mo43zf7eanfz5ixmukwl5xlgta

A Combined Non-Invasive Approach to the Study of A Mosaic Model: First Laboratory Experimental Results

Chaban, Tornari, Deiana, Andrianakis, Giovannacci, Detalle
2019 Journal of Imaging  
DHSPI and SIRT, already well known in the field of non-destructive (NDT) methods, are full-field contactless techniques, providing complementary information on the subsurface hidden discontinuities.  ...  The use of DHSPI, based on optical imaging and interferometry, provides remote control and visualization of surface micro-deformation after induced thermal stress, while the use of SIRT allows visualization  ...  This technique can also be referred to as microwave holography [30] .  ... 
doi:10.3390/jimaging5060058 pmid:34460496 pmcid:PMC8320949 fatcat:z3cpczso2zcwdcbpn43lp64zaq

Recent Advances in Active Infrared Thermography for Non-Destructive Testing of Aerospace Components

Francesco Ciampa, Pooya Mahmoodi, Fulvio Pinto, Michele Meo
2018 Sensors  
These novel thermographic techniques rely on thermoresistive internal heating and offer a fast, low power, accurate and reliable assessment of damage in aerospace composites.  ...  thermography, which uses electromagnetic radiation at the microwave frequency bands to provide rapid detection of cracks and delamination.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/s18020609 pmid:29462953 pmcid:PMC5856039 fatcat:em5dsnwtnng7rixg4ypdzm3uby

The Feasibility of Using Electromagnetic Waves in Determining Membrane Failure Through Concrete

P. Kot, A. Shaw, M. Riley, A. S. Ali, A. Cotgrave
2016 International Journal of Civil Engineering  
Microwave imaging for building fabric detection is based on the contrast 267 in dielectric properties of different types of materials and differing moisture contents.  ...  The advantage of this method is224 it's ability to effect real time monitoring using microwaves based on the interaction of 225 electromagnetic waves with the object tested.  ... 
doi:10.1007/s40999-016-0074-6 fatcat:22qmv3zgbnasbkbsgiow6byjkq

Microwave Rapid Sintering of Al-Metal Matrix Composites: A Review on the Effect of Reinforcements, Microstructure and Mechanical Properties

Penchal Matli, Rana Shakoor, Adel Amer Mohamed, Manoj Gupta
2016 Metals  
The aim of this review article is to briefly present the microwave rapid sintering process and to summarize the recent published work on the sintering and properties of pure Al and Al-based matrix composites  ...  Microwave rapid sintering involves internal heating of aluminum compacts by passing microwave energy through them.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/met6070143 fatcat:rlitor26kffzpdkiqmiehaxzrq

Review of THz-based semiconductor assurance

John True, Chengjie Xi, Nathan Jessurun, Kiarash Ahi, Navid Asadizanjani
2021 Optical Engineering: The Journal of SPIE  
Incremental advances in THz sources, detectors, and signal processing resulted in the successful applied-industrial use of THz NDT techniques on carbon fiber laminates, automotive coatings, and for detection  ...  Terahertz radiation for inspection and fault detection has been of interest for the semiconductor industry since the first generation and detection of THz signals.  ...  218 THz-AFM Scanning microwave microscopy is based on similar principles to THz near field, imaging.  ... 
doi:10.1117/1.oe.60.6.060901 fatcat:uycncszevvdevmznjn5soksmsm

ICEPT 2019 Table of Contents

2019 2019 20th International Conference on Electronic Packaging Technology(ICEPT)  
TSV-defect modeling based electromagnetic full wave analysis and defect diagnosis method design [A424] A Selective Grafting Method of Polyacrylic Acid Insulation Films on Silicon and Aluminum Surfaces  ...  Loading [A405] Ag flakes based stretchable composite tracks with high conductivity by adding AgNWs [A312] Study on Performance of Metal and Polymer Composites Parts Based by Additive Manufacturing [A304  ... 
doi:10.1109/icept47577.2019.9081061 fatcat:avl3ra2n7bdzxbdhdly3gm2nsq

Subject Index 2012

2012 IEEE transactions on dielectrics and electrical insulation  
Study between SF 6 and Eco-friendly Gases on Dielectric Coated Electrodes for Real-size Gas Insulated Switchgear 253 Detection of SF 6 Decomposition Products Generated by DC Corona Discharge Using a Carbon  ...  The Chemistry of Interfacial Tracking 996 INTERNAL INSULATION: Study on Switching Impulse Test Waveform for UHV-class Electric Power Equipment 793 INTERNAL OVERVOLTAGES: Analysis of Fast Transient Voltage  ... 
doi:10.1109/tdei.2012.6634601 fatcat:2xge6erbtrafnjzog6ky74btzm

Promoting microstructural homogeneity during flash sintering of ceramics through thermal management

Gareth M. Jones, Mattia Biesuz, Wei Ji, Sandra Fisher John, Carolyn Grimley, Charles Manière, Claire E. J. Dancer
2021 MRS bulletin  
The key limitation of scaling up the technique to the industrial manufacturing level is the intrinsic difficulty managing the heat generation and obtaining homogenous microstructures in components of industrial  ...  AbstractFlash sintering (FS) is a novel field-assisted sintering technology, where the ceramic is heated internally by the Joule effect.  ...  Pearmain of Lucideon Ltd. for helpful discussions and support. Funding for the PhD RD&I Associate  ... 
doi:10.1557/s43577-020-00010-2 fatcat:o7tytuat4rh5pnt6ahtwg4vv7u

Imaging of concrete structures

Oral Büyüköztürk
1998 NDT & E international  
requires additional development due to the composite nature of the concrete material and the complexities of reinforced or prestressed concrete systems.  ...  Efficient and accurate imaging techniques are needed for a reliable evaluation of safety and serviceability of concrete structures.  ...  Acknowledgements Parts of the study reported in this paper were supported by U.S. Army Corps of Engineers, Waterways Experiment Station, Vicksburg, Mis:~issippi.  ... 
doi:10.1016/s0963-8695(98)00012-7 fatcat:tzymeakutrbq7nhuhtjwivixni
« Previous Showing results 1 — 15 out of 2,880 results