scholarly journals A Molecular Dynamics Investigation of the Temperature Effect on the Mechanical Properties of Selected Thin Films for Hydrogen Separation

Membranes ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 241
Author(s):  
Sunday Temitope Oyinbo ◽  
Tien-Chien Jen
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Mechanical Characteristics ◽  
Loading Rate ◽  
Indentation Load ◽  
Nanoindentation Test ◽  
Film Hardness ◽  
Loading And Unloading ◽  
Effects Of Temperature ◽  
The Impact

In this study, we performed nanoindentation test using the molecular dynamic (MD) approach on a selected thin film of palladium, vanadium, copper and niobium coated on the vanadium substrate at a loading rate of 0.5 Å/ps. The thermosetting control is applied with temperature variance from 300 to 700 K to study the mechanical characteristics of the selected thin films. The effects of temperature on the structure of the material, piling-up phenomena and sinking-in occurrence were considered. The simulation results of the analysis and the experimental results published in this literature were well correlated. The analysis of temperature demonstrated an understanding of the impact of the behaviour. As the temperature decreases, the indentation load increases for loading and unloading processes. Hence, this increases the strength of the material. In addition, the results demonstrate that the modulus of elasticity and thin-film hardness decreases in the order of niobium, vanadium, copper and palladium as the temperature increases.

Thermoplastique Degradation under Heat and Irradiation

2021 ◽  
Vol 904 ◽  
pp. 196-201
Author(s):  
Sonya Redjala ◽  
Said Azem ◽  
Nourredine Ait Hocine
Keyword(s):  
Mechanical Characteristics ◽  
Low Cost ◽  
Impact Resistance ◽  
Ultra Violet ◽  
Analytical Techniques ◽  
Mechanical Tests ◽  
Ultraviolet Rays ◽  
Technical Material ◽  
Effects Of Temperature ◽  
The Impact

The aim of the article is to highlight the effect of the environment on the properties of a polycarbonate (PC). It consists in aging this material under Ultra-violet (UV) combined with temperature for different periods of time, and to reveal the physicochemical and mechanical changes caused by aging. PC is a highly valued technical material for its various important characteristics and low cost. It finds its application in various fields but mainly in those whose requirements are the transparency and the impact resistance. The physicochemical and mechanicals characterizations of the marketed polycarbonate are necessary in order to highlight its intrinsic properties and to develop strategies that can improve its lifespan. In this work, we highlight the physicochemical and mechanical characteristics of virgin and aged polycarbonate. For this, analytical techniques and mechanical tests were used. A comparison of the characteristics revealed the combined effects of temperature and ultraviolet rays.

scholarly journals Evolution of Principle and Practice of Electrodeposited Thin Film: A Review on Effect of Temperature and Sonication

2011 ◽  
Vol 2011 ◽  
pp. 1-16 ◽  
Author(s):  
A. Mallik ◽  
B. C. Ray
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Mechanical Properties ◽  
Residual Stress ◽  
Electrochemical Deposition ◽  
Surface Engineering ◽  
Effect Of Temperature ◽  
Structure And Morphology ◽  
Nucleation Mechanisms ◽  
Effects Of Temperature

This review discusses briefly the important aspects of thin films. The introduction of the article is a summary of evolution of thin films from surface engineering, their deposition methods, and important issues. The fundamental aspects of electrochemical deposition with special emphasis on the effect of temperature on the phase formation have been reviewed briefly. The field of sonoelectrochemistry has been discussed in the paper. The literature regarding the effects of temperature and sonication on the structure and morphology of the deposits and nucleation mechanisms, residual stress, and mechanical properties has also been covered briefly.

scholarly journals The influence of selenium amount added into the graphite box during the selenization of solution deposited CIGSe thin films.

2021 ◽  
Vol 2053 (1) ◽  
pp. 012008
Author(s):  
G M Albalawneh ◽  
M M Ramli ◽  
M ZM Zain ◽  
Z Sauli
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Solar Cell ◽  
High Performance ◽  
Low Cost ◽  
Precursor Solution ◽  
Precursor Film ◽  
Fine Grained ◽  
Thin Film Fabrication ◽  
The Impact

Abstract Cu(In,Ga)Se2 (CIGSe) semiconductor is an efficient light absorber material for thin-film solar cell technology. The sequential evaporation of precursor solution, followed by the selenization process, is a promising non-vacuum and low-cost approach for CIGSe thin-film fabrication. The main properties of CIGSe thin films are strongly affected by the post-selenization step. Hence, thorough control of selenization parameters is essential for achieving pure crystalline, large grain films needed for high-performance solar cell devices. In this study, the impact of selenium (Se) amount added during the selenization step was evaluated. The structural, morphological, and compositional properties of the selenized thin films were investigated. The CIGSe precursor film was deposited by a spin-coating technique using a thiol/amine-based solution, followed by annealing with different Se amounts (100, 200, and 300 mg) within a partially closed small round graphite container. In all cases, uniform films of 1.2–1.5 µm thickness with a well-defined single chalcopyrite phase were obtained. It was observed that the grain size and Se content increased with increasing Se mass added. Moreover, the sample selenized with 200 mg Se resulted in higher surface coverage, thinner fine-grained layer, and less MoSe2 formation than the excess Se samples.

scholarly journals Sulfurization of Electrodeposited Sb/Cu Precursors for CuSbS2: Potential Absorber Materials for Thin-Film Solar Cells

2022 ◽  
Vol 8 ◽  
Author(s):  
Aimei Zhao ◽  
Yanping Wang ◽  
Bing Li ◽  
Dongmei Xiang ◽  
Zhuo Peng ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Solar Cells ◽  
Annealing Temperature ◽  
Thin Film Solar Cells ◽  
Device Performance ◽  
Promising Candidate ◽  
Good Crystallinity ◽  
Effects Of Temperature ◽  
Efficient Solar Cell

CuSbS2, as a direct bandgap semiconductor, is a promising candidate for fabricating flexible thin-film solar cells due to its low grain growth temperature (300°C–450°C). Uniform and highly crystalline CuSbS2 thin films are crucial to improving device performance. However, uniform CuSbS2 is difficult to obtain during electrodeposition and post-sulfurization due to the “dendritic” deposition of Cu on Mo substrates. In this study, Sb/Cu layers were sequentially pulse electrodeposited on Mo substrates. By adjusting the pulse parameters, smooth and uniform Sb layers were prepared on Mo, and a flat Cu layer was obtained on Sb without any dendritic clusters. A two-step annealing process was employed to fabricate CuSbS2 thin films. The effects of temperature on phases and morphologies were investigated. CuSbS2 thin films with good crystallinity were obtained at 360°C. As the annealing temperature increased, the crystallinity of the films decreased. The CuSbS2 phase transformed into a Cu3SbS4 phase with the temperature increase to 400°C. Finally, a 0.90% efficient solar cell was obtained using the CuSbS2 thin films annealed at 360°C.

scholarly journals Effects of AlN and BCN Thin Film Multilayer Design on the Reaction Time of Ni/Ni-20Cr Thin Film Thermocouples on Thermally Sprayed Al2O3

Sensors ◽  
2019 ◽  
Vol 19 (15) ◽  
pp. 3414
Author(s):  
Tillmann ◽  
Kokalj ◽  
Stangier ◽  
Schöppner ◽  
Malatyali
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Reaction Time ◽  
Seebeck Coefficient ◽  
Physical Structure ◽  
Boron Carbonitride ◽  
Deposition Parameters ◽  
Thin Film Thermocouples ◽  
Nitride Layers ◽  
The Impact

Thin film thermocouples are widely used for local temperature determinations of surfaces. However, depending on the environment in which they are used, thin film thermocouples need to be covered by a wear or oxidation resistant top layer. With regard to the utilization in wide-slit nozzles for plastic extrusion, Ni/Ni-20Cr thin film thermocouples were manufactured using direct-current (DC) magnetron sputtering combined with Aluminiumnitride (AlN) and Boron-Carbonitride (BCN) thin films. On the one hand, the deposition parameters of the nitride layers were varied to affect the chemical composition and morphology of the AlN and BCN thin films. On the other hand, the position of the nitride layers (below the thermocouple, above the thermocouple, around the thermocouple) was changed. Both factors were investigated concerning the influence on the Seebeck coefficient and the reaction behaviour of the thermocouples. Therefore, the impact of the nitride thin films on the morphology, physical structure, crystallite size, electrical resistance and hardness of the Ni and Ni-20Cr thin films is analysed. The investigations reveal that the Seebeck coefficient is not affected by the different architectures of the thermocouples. Nevertheless, the reaction time of the thermocouples can be significantly improved by adding a thermal conductive top coat over the thin films, whereas the top coat should have a coarse structure and low nitrogen content.

scholarly journals Numerical Study on the Dependency of Microstructure Morphologies of Pulsed Laser Deposited TiN Thin Films and the Strain Heterogeneities during Mechanical Testing

Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1705
Author(s):  
Konrad Perzynski ◽  
Grzegorz Cios ◽  
Grzegorz Szwachta ◽  
Piotr Bała ◽  
Lukasz Madej
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Finite Element ◽  
Numerical Study ◽  
Pulsed Laser ◽  
Nanoindentation Test ◽  
Metallographic Analysis ◽  
Microscale Model ◽  
Tin Thin Films ◽  
Microstructure Morphology

Numerical study of the influence of pulsed laser deposited TiN thin films’ microstructure morphologies on strain heterogeneities during loading was the goal of this research. The investigation was based on the digital material representation (DMR) concept applied to replicate an investigated thin film’s microstructure morphology. The physically based pulsed laser deposited model was implemented to recreate characteristic features of a thin film microstructure. The kinetic Monte Carlo (kMC) approach was the basis of the model in the first part of the work. The developed kMC algorithm was used to generate thin film’s three-dimensional representation with its columnar morphology. Such a digital model was then validated with the experimental data from metallographic analysis of laboratory deposited TiN(100)/Si. In the second part of the research, the kMC generated DMR model of thin film was incorporated into the finite element (FE) simulation. The 3D film’s morphology was discretized with conforming finite element mesh, and then incorporated as a microscale model into the macroscale finite element simulation of nanoindentation test. Such a multiscale model was finally used to evaluate the development of local deformation heterogeneities associated with the underlying microstructure morphology. In this part, the capabilities of the proposed approach were clearly highlighted.

Study of SiC’s Mechanical Property Variance Caused by Film Thickness

2015 ◽  
Vol 645-646 ◽  
pp. 400-404
Author(s):  
Zong Lei Jiao ◽  
Jian Zhu
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Mechanical Properties ◽  
Mechanical Property ◽  
Chemical Vapor Deposition ◽  
Elastic Modulus ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Deposition Process ◽  
Indentation Load

The mechanical properties of SiC thin films deposited by chemical vapor deposition process on silicon substrate are studied using nanoindentation techniques. The SiC thin films are of three different thicknesses: 1.6μm、4.5μm、9μm. In this study, nanoindentation method is preferred due to its reliability and accuracy on determining mechanical properties from indentation load-displacement data. The mechanical properties of elastic modulus and hardness are characterized. 1.6μm SiC thin film has the following values: E=345.73Gpa, H=33.71Gpa; 4.5μm SiC thin film has the following values: E=170.18Gpa, H=10.33Gpa; 9μm SiC thin film: E=167.96Gpa, H=9.48Gpa

Numerical Derivative Analysis of Load-Displacement Curves in Depth-Sensing Indentation

2003 ◽  
Vol 791 ◽  
Author(s):  
Tom Juliano ◽  
Vladislav Domnich ◽  
Tom Buchheit ◽  
Yury Gogotsi
Keyword(s):  
Thin Film ◽  
Single Crystal Silicon ◽  
Indentation Load ◽  
Fused Silica ◽  
Depth Sensing ◽  
Crystal Silicon ◽  
Derivative Analysis ◽  
Loading And Unloading ◽  
Load Displacement ◽  
Carbide Derived Carbon

ABSTRACTThe use of load-displacement derivative behavior and power-law curve fitting is applied to find the location of events for a number of different materials during depth-sensing indentation. Load-displacement curves for Berkovich indentations on fused silica, fullerene thin film on sapphire, CdTe thin film on silicon, single crystal silicon, carbide derived carbon, and a polymethylmethacrylate/hydroxyapatite (PMMA/HA) particle composite are examined. The analysis is applied to quantify the location of different events that occur during material loading and unloading.

Modification of intrinsic defects in IZO/IGZO thin films for reliable bilayer thin film transistors

RSC Advances ◽  
2016 ◽  
Vol 6 (79) ◽  
pp. 75693-75698 ◽  
Author(s):  
Nidhi Tiwari ◽  
Ram Narayan Chauhan ◽  
Po-Tsun Liu ◽  
Han-Ping D. Shieh
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Thin Film Transistors ◽  
Intrinsic Defects ◽  
Bias Stability ◽  
The Impact ◽  
Active Channel

Dual active channel IZO/IGZO thin film transistors as such and with ZnO interlayer are fabricated and characterized to investigate the impact of ultra-thin ZnO insertion on their performance and bias stability.

Beyond Thin Films: Clarifying the Impact of c-Li15Si4 Formation in Thin Film, Nanoparticle, and Porous Si Electrodes

2021 ◽  
Author(s):  
Jasper C. Woodard ◽  
W. Peter Kalisvaart ◽  
Sayed Youssef Sayed ◽  
Brian C. Olsen ◽  
Jillian M. Buriak
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Porous Si ◽  
The Impact
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