Results 141 to 150 of about 67,775 (286)
Nondestructive evaluation of ceramic and metal matrix composites for NASA's HITEMP and enabling propulsion materials programs [PDF]
In a preliminary study, ultrasonic, x-ray opaque, and fluorescent dye penetrants techniques were used to evaluate and characterize ceramic and metal matrix composites. Techniques are highlighted for identifying porosity, fiber alignment, fiber uniformity,
Generazio, Edward R.
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Deep Underground Science and Engineering, EarlyView.Joint orientation significantly affects P‐wave velocity, with the highest velocity at zero‐degree angles, decreasing to 30° as the angle increases. The velocity increases slightly from 30 to 45 degrees but sharply decreases from 45 to 90 degrees. Abstract Determination of the required parameters in different science contexts using the ultrasonic wave ...
Yaghoob Zarei +4 more
wiley +1 more source
A study of the stress wave factor technique for nondestructive evaluation of composite materials [PDF]
The acousto-ultrasonic method of nondestructive evaluation is an extremely sensitive means of assessing material response. Efforts continue to complete the understanding of this method.
Duke, J. C., Jr. +3 more
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ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.This work uses ultrafast photoexcitation to enhance doped polyaniline films' conductivity and transistor transconductance. Polyaniline (PANI) exhibits remarkable electrical conductivity and mechanical flexibility, rendering it widely applicable in flexible electronic devices.
Jiawei Li +10 more
wiley +1 more source
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.Polyethylene glycol‐coated, lead‐free CsCu2I3 nanocrystal scintillator films achieve superior X‐ray imaging resolution over unpatterned films at 80 kVp by reducing crosstalk through lithographic micropatterning and optimized thickness control. The spatial resolution of X‐ray imaging is often limited by radioluminescence scattering, which is exacerbated
Atanu Jana +6 more
wiley +1 more source
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.The structure, properties, preparation methods, and characterization techniques of BP. As a typical 2D layered material, black phosphorus (BP) demonstrates exceptional promise in various fields, particularly in energy storage for alkali metal‐ion batteries. However, its distinctive structure and properties, together with the compositional complexity of
Yunqing Wang +7 more
wiley +1 more source
The application of acoustic emission technique to fatigue crack measurement [PDF]
The applicability of acoustic emission technique to measure fatigue cracks in aluminum alloy specimens was investigated. There are several variables, such as the metallurgical and the physical treatment of the specimen, that can affect the level of ...
Crews, J. H., Jr. +2 more
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Harnessing Piezoelectric Biomaterials for Pathogenic Eradication and Tissue Regeneration
Exploration, EarlyView.This review highlights recent advances in piezoelectric biomaterials for antibacterial therapy and tissue regeneration, discussing material classifications, catalytic mechanisms, property enhancements, biomedical applications, and future challenges in clinical translation.
Wenxuan Mao +11 more
wiley +1 more source
Food Safety and Health, EarlyView.Although fresh produce is extremely perishable and contaminated, it is essential for good health. To eliminate important foodborne pathogens, this paper investigates UV‐C irradiation as a safe, nonthermal technique. UV dose, exposure duration, and product characteristics all affect effectiveness.
Krish Rauniyar, Ruplal Choudhary
wiley +1 more source
Input-output characterization of fiber reinforced composites by P waves [PDF]
Input-output characterization of fiber composites is studied theoretically by tracing P waves in the media. A new path motion to aid in the tracing of P and the reflection generated SV wave paths in the continuum plate is developed.
Renneisen, John D. +1 more
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