Materials Literature
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This study proposes a simple and effective method, termed Euclidean Distance Measurement (EDM) method, to analyze motor's current waveforms for effectively determining the motor's quality types. This method is easily performed and does not require complex mathematic computations. It can recognize good or defective mot…
Temperature based control of Shape Memory Alloys faces difficulties in the determination of the actual material temperature profiles due to the typically small geometrical characteristics and possible high rates of excitation. Under such operating conditions, the expected hysteretic response can be transformed into a…
The oxide skin defect during hot rolling process for Cu-Ni-Si alloy strip was investigated. Oxide skin defects were analyzed by means of alloy elements detection and microstructures characterization. The characterization and test results showed that high temperature oxidation and silicon segregation are the main cause…
Perovskites of the Bi0.8La0.2Fe1 − x Cr x O3 system (x = 0, 0.05) were investigated by Mössbauer spectroscopy in the temperature range of 298–800 K. The samples were fabricated by solid-state synthesis and had a rhombic structure. Iron ions in Bi0.8La0.2FeO3 and Bi0.8La0.2Fe0.95Cr0.05O3 are situated in trivalent state…
We propose a polarization insensitive near infrared perfect absorber (PA) based on the localized surface plasmon resonances (LSPRs) of nanorod arrays. Polarization insensitivity of our PA structure is achieved by combining two sets of nanorods with x and y orientation respectively. Study carried out by finite differen…
The impact modeling of a hot-formed component with tailored mechanical properties is studied to understand the influence of the thermal processing history and how the final properties of the component will affect its impact response. This paper presents a numerical study of the forming and quenching process and subseq…
We investigate ultra-thin (6 to 31 nm) intrinsic amorphous silicon (a-Si)/organic hybrid photovoltaic (PV) structures that can produce transmissive or reflective colors, which are insensitive to incidence angle of up to ±70° regardless of polarization. The distinct colors are based on efficient photon manipulation aid…
A family of TeO2-based glasses is known to have high third-order nonlinear properties and expected as nonlinear optical devices. In the present study, we fabricated Ag2O-TeO2 and Ag2O-Nb2O5-TeO2 glasses, and estimated their structures and linear/nonlinear optical properties. The main results showed that the absorption…
Oxygen ion conductors of zirconia based ceramics are a class of materials with technological applications in several application areas: sensors of chemical species, oxygen pumps, solid oxide fuel cells among others [1]. For these applications, the zirconia must possess the fluorite type crystal structure, or close to…
The behavior of the ferromagnetic alloy based on Fe-Cr-Co under high-speed loading is presented. Three types of samples were prepared with different pre-treatments: quenching only; quenching and ageing; and quenching and ageing under an intense external magnetic field. The sub-microsecond impact load was created by th…
In the present study interfacial characteristics of carbon nanotubes (CNTs) and their composite with different types of defects are calculated using molecular dynamics (MD) simulation. Although single-walled CNTs (SWCNTs) are found to have ultra-high stiffness and strength, an enormous scatter is also observed in avai…
Surface Self-nanocrystallization (SSNC) can produce nanometer grains (10~50μm depth) in the surface layer of metallic materials. And high strength, residual compressive stress as well as a mass of defects attributed to grain refinement and severe plastic deformation, greatly improve their surface properties, such as s…
We investigate a NARMAX controller structure involving hysteretic nonlinearities. A weighted combination of backlash nonlinearities constitutes a Prandtl-Ishlinskii hysteresis model. The rationale for using a Prandtl-Ishlinskii NARMAX (PIN) controller is due to the fact that the describing function of a backlash nonli…
The impact of the Sb composition on the structural and optical properties of ten-stack InAs/GaAsSb quantum dots (QDs) were investigated using transmission electron microscopy (TEM), high-resolution x-ray diffraction (XRD), and photoluminescence (PL). The TEM images demonstrate that the Sb composition affects the chang…
A dicalcium phosphate dihydrate (CaHPO4·2H2O, DCPD) coating is prepared to reduce the biodegradation rate of Mg–Ca–Zn alloy. The substrate is immersed into a solution with Ca(NO3)2·4 H2O 0.1 mol/L and Na3PO4 0.1 mol/L to obtain calcium phosphate coating. Surface morphology is observed by scanning electron microscopy (…
Synthesis of Cu2ZnSnS4(CZTS) thin films by fast sulfurization of sputtered Sn/Zn/Cu precursors under ambient H2S has been studied. Surface morphology and cross section of the films at different sulfurization processes were investigated by scanning electron microscopy (SEM). To further explore the CZTS layer, the follo…
Abstract Light Emitting Memory (LEM), a LED‐based panel, is presented to address several key challenges in 3D displays. Under $100, LEM achieves 10K true‐color frame rate, 64times32 resolution and 2.54mm pixel pitch. Compared with current state‐of‐the‐art implementations, LEM is effectively 10x faster, 16x smaller and…
Abstract Stabilization of fine‐tuned FLC parameters has been realized by introducing the polymer network in pure FLC material to satisfy the constraints of the ESHFLC and therefore achieve high contrast (comparable to nematic liquid crystals), fast response time of <30 μs and low driving voltage.
All spacecraft in low orbit are subject to hypervelocity impacts by meteoroids and space debris. These impacts can damage spacecraft flight-critical systems, which can in turn lead to catastrophic failure of the spacecraft. The numerical simulations of characteristics of debris cloud produced by an aluminum sphere pro…
In this paper a composite structure, topography, wettability and nanohardness of a (100) Si surface modied by means of ion-assisted deposition of metal (Me) coatings in conditions of a self-irradiation are discussed.