Results 61 to 70 of about 730,491 (396)

Impact of AlN Seed Layer on Microstructure and Piezoelectric Properties of YxAl1−xN (x = 15%) Thin Films

open access: yesAdvanced Electronic Materials, 2023
Alloying transition metals into aluminum nitride (AlN) has surged over the past decade to increase the piezoelectric performance of AlN for microelectromechanical systems (MEMS) applications.
Shardul Pandit   +4 more
doaj   +1 more source

A Comprehensive Review of Additive Manufacturing for Space Applications: Materials, Advances, Challenges, and Future Directions

open access: yesAdvanced Engineering Materials, EarlyView.
Additive manufacturing (AM) transforms space hardware by enabling lightweight, high‐performance, and on‐demand production. This review outlines AM processes—powder bed fusion (PBF), directed energy deposition (DED), binder jetting (BJ), sheet lamination (SL), and material extrusion (ME)—applied to propulsion, satellite structures, and thermal devices ...
Stelios K. Georgantzinos   +8 more
wiley   +1 more source

A Novel Bi-Stable MEMS Membrane Concept Based on a Piezoelectric Thin Film Actuator for Integrated Switching

open access: yesProceedings, 2019
This study reports on a novel bi-stable actuator with an integrated aluminum nitride (AlN) piezoelectric layer sandwiched between two electrodes. To achieve bistability, the membranes must exceed a characteristic compressive stress value, also called the
Manuel Dorfmeister   +3 more
doaj   +1 more source

Conceptual hermetically sealed elbow actuator [PDF]

open access: yes, 1968
Electrically or hydraulically powered, hermetically sealed angular or rotary actuator deflects mechanical members over a range of plus or minus 180 degrees.
Wuenscher, H. F.
core   +1 more source

Highly Dynamic Shape Memory Alloy Actuator for Fast Moving Soft Robots

open access: yesAdvanced Materials & Technologies, 2019
Shape memory alloys (SMAs) are popular as actuators for soft bioinspired robots because they are naturally compliant, have high work density, and can be operated using miniaturized on‐board electronics for power and control.
Xiaonan Huang   +6 more
semanticscholar   +1 more source

Large Area, Cost‐Effective, and Ultra‐Fast Fabrication of Mini‐Coils Toward Noninvasive Magnetic Applications

open access: yesAdvanced Engineering Materials, EarlyView.
A simple, cleanroom‐free method produces flexible mini‐coils using automated blade cutting. The process is fast, low‐cost, and supports diverse materials. The coils show strong durability and performance under repeated bending. Demonstrated use in resistor‐inductor filters and magnetic nanoparticle control proves their adaptability.
Changhao Ge   +5 more
wiley   +1 more source

Elastic Properties Measurement Using Guided Acoustic Waves

open access: yesSensors, 2021
Nondestructive evaluation of elastic properties plays a critical role in condition monitoring of thin structures such as sheets, plates or tubes. Recent research has shown that elastic properties of such structures can be determined with remarkable ...
Viktor Fairuschin   +3 more
doaj   +1 more source

Actuator device schedules rate of valve closure [PDF]

open access: yes, 1966
Prevalve actuator schedules the closure rate of a valve. The actuator is spring loaded to produce a normally open valve and pneumatically powered to close the valve.

core   +1 more source

Micromechanical Insights into Sinter‐Based Additively Manufactured NiTi with Nb as a Sintering Aid

open access: yesAdvanced Engineering Materials, EarlyView.
This study investigates the microstructural and micromechanical behavior of NiTiNb made through filament‐based materials extrusion via chemically correlated nanoindentation. B19' remnants from the original powder lead to Nb gradients within NiTiNb grains due to the short sintering times required in liquid‐phase sintering.
Nerea Abando   +4 more
wiley   +1 more source

Simple piezoelectric-actuated mirror with 180 kHz servo bandwidth

open access: yes, 2010
We present a high bandwidth piezoelectric-actuated mirror for length stabilization of an optical cavity. The actuator displays a transfer function with a flat amplitude response and greater than 135$^\circ$ phase margin up to 200 kHz, allowing a 180 kHz ...
Abramovici   +26 more
core   +1 more source

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