scholarly journals Magnetron Sputtering Construction of Nano-Al Metallized Wood and Its Functional Research

Forests ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1564
Author(s):  
Yanan Wang ◽  
Chengzhu Jin ◽  
Xinyi Wang ◽  
Qiushuang Li ◽  
Wenxuan Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Magnetron Sputtering ◽  
Sheet Resistance ◽  
Wood Surface ◽  
Functional Improvement ◽  
Material Structure ◽  
Wetting Properties ◽  
Al Metallization ◽  
Wood Surfaces

The magnetron sputtering method was used to deposit nano-Al film on the wood surface of Pinus sylvestris L. var. mongholica Litv., and the material structure, electrical conductivity, mechanical properties and wetting properties were tested and characterized. When the sputtering time was 60 min, the average cross-grain sheet resistance of metallized wood was 695.9 mΩ, and the average along-grain sheet resistance was 227.2 mΩ. Load displacement decreased by more than 88%,elastic modulus increased by 49.2 times, hardness increased by 46 times andsurface hydrophobic angle was close to 130°. The grain size of the Al film on the wood surface was presented as nanoparticles, and the arrangement was uniform and dense. The results indicate that without any burden on the environment, the use of magnetron sputtering can quickly and efficiently achieve Al metallization on wood surfaces, so that the wood surface can obtain conductivity and hydrophobic properties. The elastic modulus and hardness of the wood surface were improved, the mechanical properties of the wood were effectively improved and the functional improvement of the wood was realized. This study provides a feasible method and basis for the study of the simple, efficient and pollution-free modification of wood.

Study on Laser Micro Shock Effect on Electrical Resistivity of Nanometer Copper Film

2014 ◽  
Vol 989-994 ◽  
pp. 45-48
Author(s):  
Qing Xue ◽  
Yin Qun Hua ◽  
Yu Chuan Bai ◽  
Rui Fang Chen ◽  
Hai Xia Liu
Keyword(s):  
Mechanical Properties ◽  
Electrical Resistivity ◽  
Elastic Modulus ◽  
Stress Concentration ◽  
Magnetron Sputtering ◽  
Twin Boundary ◽  
Copper Film ◽  
Electrical Performance ◽  
Shock Processing ◽  
Main Factor

The aim of this research is to improve the electrical performance of the nanometer copper film by laser micro shock processing. The nanometer copper film was prepared by the magnetron sputtering. The mechanism of laser micro shock processing effect on electrical resistivity, hardness and elastic modulus was investigated. The results show that the electrical resistivity of copper film after laser micro shock reduced by 22.5 % on average. And, the hardness and the elastic modulus increased by 38.5 % and 45.2 % on average, respectively. According to our research, we conclude that, the existence of a large number of twin, twin boundary, fault and the grow up grain are the main factor of the improvement of the electrical performance; and the existence of twin, stress concentration holes and fault are the key to improve its mechanical properties.

scholarly journals The Implication of Benzene–Ethanol Extractive on Mechanical Properties of Waterborne Coating and Wood Cell Wall by Nanoindentation

Coatings ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 449 ◽  
Author(s):  
Yan Wu ◽  
Yingchun Sun ◽  
Feng Yang ◽  
Haiqiao Zhang ◽  
Yajing Wang
Keyword(s):  
Mechanical Properties ◽  
Cell Wall ◽  
Wood Surface ◽  
Cell Walls ◽  
Wood Cell Wall ◽  
Coating Layer ◽  
Waterborne Coating ◽  
Average Value ◽  
Wood Surfaces ◽  
Extraction Treatment

The waterborne coating uses water as its solvent, which will partially dissolve wood extractives when it is applied to wood surfaces. This influences both the coating curing process and the mechanical properties of the cured coating. To investigate these influences, the mechanical properties of waterborne polyacrylic coating on control and extractive-free wood surfaces were investigated by nanoindentation. Reductions to elastic modulus (Er) and hardness (H) of the coating layer was observed in the wood cell walls adjacent to or away from coating layers. Extraction treatment resulted in significant decrease of the Er and H of the coating layer on extractive-free wood surface comparing with control wood, but the values slightly increased for extractive-free wood cell walls compared to a control. Er and H of coating in wood cell lumen were higher than the average value of coating layer on wood surface in both the control and extractive-free wood. The Er of wood cell wall without coating filled in lumen was significantly higher than those of filling with coating. However, there was no distinct difference of H. The Er and H of CCML in extractive-free wood were 15% and 6% lower than those in control ones, respectively.

Anealing Effect on the Microstructure and Mechanical Properties of LaB6 Films

2013 ◽  
Vol 303-306 ◽  
pp. 2514-2518 ◽  
Author(s):  
Li Jie Hu ◽  
Lin Zhang ◽  
Jie Lin ◽  
Guang Hui Min
Keyword(s):  
Mechanical Properties ◽  
Raman Spectrum ◽  
Elastic Modulus ◽  
Magnetron Sputtering ◽  
Cross Sections ◽  
Annealing Process ◽  
Dc Magnetron Sputtering ◽  
Microstructure And Mechanical Properties ◽  
Negative Effect ◽  
Deposited Films

Lathanum hexaboride films were deposited by dc magnetron sputtering with the same sputtering parameters. AFM, XRD, Raman spectrum was used to characterize the film. The as-deposited films were annealed at 400 oC, 500 oC and 600 oC, respectively. After 400 oC’s annealing, morphology of fracture cross-sections of the films exhibited evolutions from columnar to the equiaxial, and the crystallinity of the film was improved as well. It was also found annealing process generated negative effect on the film’s hardness and elastic modulus.

scholarly journals Research on the Gradual Process of the Metallization Structures and Mechanical Properties of Wood Veneer

Symmetry ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 550 ◽  
Author(s):  
Jingkui Li ◽  
Ruoying Wang ◽  
He Tian ◽  
Yanan Wang ◽  
Dawei Qi
Keyword(s):  
Mechanical Properties ◽  
Magnetron Sputtering ◽  
Wood Surface ◽  
Deposition Time ◽  
Copper Film ◽  
Wood Cellulose ◽  
Wood Veneer ◽  
Gradual Process ◽  
Veneer Surface ◽  
Moduli Of Elasticity

In order to improve the mechanical properties of the wood surface and explore the mechanical effect of wood veneer surface metallization, the 31-year-old Pinus sylvestris is taken as the research object and Cu is deposited on the wood surface by magnetron sputtering to achieve wood veneer metallization. Based on X-ray diffraction (XRD) and nanoindentation, a research on the gradual process of the structures and mechanical properties of wood veneer metallization was carried out. The results indicate that wood veneer metallization does not affect the crystallization zone of wood, there are still wood cellulose characteristic peaks and the crystalline structure of the wood cellulose is not damaged; the thickness of the copper thin film increases with the increase of the deposition time, the cellulose characteristic peak strength gradually decrease, and the relative crystallinity also decreases; the characteristic diffraction peaks of Cu (111), Cu (200), and Cu (220) appear near the diffraction angle 2θ which is equal to 43.3°, 50.4°, and 74.1°, and the diffraction peak intensity increases with increase of deposition time, the copper film of the metal wood veneer crystallizes well; the load–displacement of wood veneer decreases significantly with the increase of deposition time, while the moduli of elasticity and hardness increase rapidly. The load–displacement of the samples which were coated for 15 min decreased by 80%, while the moduli of elasticity and hardness of these samples increased by 24.1 times and 17.3 times, respectively. From the results of Scanning Electron Microscope (SEM) measurement of the metallization of wood veneer, it can be seen that the uniform and continuous copper film can be formed on the wood veneer surface by using the magnetron sputtering method. This paper provides a basis for wood veneer surface metallization, which is of great significance for the functional improvement of wood, the expansion of wood application fields, and the enhancement of added value.

Synthesis of Coatings With Hardness Exceeding 40 GPa by Magnetron Sputtering

1998 ◽  
Vol 120 (2) ◽  
pp. 179-183 ◽  
Author(s):  
Mei-Ling Wu ◽  
Zunde Yang ◽  
Yip-Wah Chung ◽  
Ming-Show Wong ◽  
William D. Sproul
Keyword(s):  
Mechanical Properties ◽  
Magnetron Sputtering ◽  
Volume Fraction ◽  
High Resolution Electron Microscopy ◽  
Substrate Bias ◽  
Cathode Sputtering ◽  
Lattice Match ◽  
Wetting Properties ◽  
Resolution Electron ◽  
Composition Structure

Single- and dual-cathode DC magnetron sputtering was used to produce TiB2 coatings and CNx/ZrN multilayers, respectively, with hardness exceeding 40 GPa. The composition, structure, topography, and mechanical properties were determined by various techniques, including Auger electron spectroscopy, X-ray diffraction, high-resolution electron microscopy, atomic force microscopy, and nanoindentation. An optimum combination of the sputtering pressure and substrate bias results in the production of ultrasmooth TiB2 coatings with hardness up to 50 GPa and excellent wetting properties. The rationale for studying the CNx/ZrN system is that ZrN(111) provides excellent lattice match to the hypothetical β-C3N4(0001) face (β-C3N4 was predicted to have mechanical properties comparable to diamond). Using a dual-cathode sputtering system, we produced crystalline multilayers of CNx/ZrN with bilayer thickness of 1–2 nm. Using various combinations of nitrogen partial pressure, target powers, and substrate bias, we found that the hardness of these coatings correlates very strongly with the occurrence of (111) texture of ZrN, consistent with the lattice-match strategy. Even with a ZrN volume fraction of 70 percent, such multilayer coatings have been synthesized with hardness in the 50 GPa regime.

scholarly journals Nanomechanical and Macrotribological Properties of CVD-Grown Graphene as a Middle Layer between Metal Pt Cylinders and SiO2/Si Substrate

2015 ◽  
Vol 2015 ◽  
pp. 1-7
Author(s):  
Hongyan Wu ◽  
Zhengbin Gu ◽  
Shantao Zhang ◽  
G. Hussain
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Friction Coefficient ◽  
Magnetron Sputtering ◽  
Microelectromechanical Systems ◽  
Middle Layer ◽  
Si Substrate ◽  
Wear Performance ◽  
Periodic Arrays ◽  
Grown Graphene

The CVD-grown graphene as a middle layer was introduced between Pt cylinders and SiO2/Si to extend the application of graphene for improving the wear performance of microelectromechanical systems. Periodic arrays of Pt cylinders were prepared on the graphene/SiO2/Si (Pt/graphene) and SiO2/Si substrate (Pt/SiO2) using the magnetron sputtering technique. To characterize Pt/graphene and Pt/SiO2, nanoindentation and macrotribological tests were performed. The results showed that the friction coefficient was lower and the wear lifetime of Pt/graphene was longer than those of Pt/SiO2. Graphene, as a middle layer, was not only observed to have significant influence on the mechanical properties (i.e., microhardness and elastic modulus), but also found to improve the adhesive strength between SiO2/Si and Pt cylinders.

Optical and Micro-Mechanical Properties of Ag-Based Low-E Glass by Magnetron Sputtering

2013 ◽  
Vol 477-478 ◽  
pp. 977-981 ◽  
Author(s):  
Jing Kai Yang ◽  
Hong Li Zhao ◽  
Li Ping Zhao ◽  
Jian Li
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Surface Morphology ◽  
Magnetron Sputtering ◽  
Figure Of Merit ◽  
Optoelectronic Properties ◽  
Tempering Time

Ag-based low-E films with a multilayer construction of top-Si3N4/SnO2/NiCrOx/Ag/ZnO/ NiCrOx/TiO2/under-SiOxNy were deposited on unheated glass by vacuum magnetron sputtering and then post-treated in the glass tempering furnace at 675±25°C for 4 min, 5 min and 6 min, respectively. The effects of tempering time on the surface morphology, optical and micro-mechanical properties have been investigated. The results show that the edge of the particles become vague with the increasing time. After tempering, the transmittance of 550 nm is higher than that of the as-deposited glass of 75.89%. Ag-based Low-E films tempered at 675±25°C for 6 min possess the biggest value of the figure of merit of 6.86×10-3 Ω-1 and exhibits the optimal optoelectronic properties. The composite nanohardness increase from 8.04 GPa to 9.23 GPa and the elastic modulus increases from 62.39 GPa to 84.58 GPa when tempered from 0 min to 6 min.

Wood Functional Modification Based on Deposition of Nanometer Copper Film by Magnetron Sputtering

2020 ◽  
Vol 70 (3) ◽  
pp. 340-349
Author(s):  
Jingkui Li ◽  
Yanan Wang ◽  
He Tian ◽  
Dawei Qi ◽  
Ruoying Wang
Keyword(s):  
Electrical Conductivity ◽  
Magnetron Sputtering ◽  
Physical Properties ◽  
Sheet Resistance ◽  
Wood Surface ◽  
Room Temperature ◽  
Copper Film ◽  
Base Temperature ◽  
Wood Veneer ◽  
Thin Copper Film

Abstract It can be helpful for selected applications to improve the functionality of wood by compounding nano-metal materials with wood, endowing the wood surface with certain physical properties, for example, metallicity, electrical conductivity, and hydrophobicity. Therefore, in this study, a thin copper film was deposited on the surface of Pinus sylvestris L. var. mongholica Litv. veneer by magnetron sputtering. The film was applied at both room temperature and 200°C to obtain nano-copper–wood composites. The physical properties of wood-based nano-metal composites were characterized. The results indicated that the wood veneer metallization had no effect on the crystallization zone of wood; there were still wood cellulose characteristic peaks, but the intensity of the diffraction peak decreased. At the same time, there were characteristic diffraction peaks of copper. The mechanical properties of the wood veneer surface changed greatly; the surface of copper-plated wood veneer had good electrical conductivity and the wettability of the wood surface transformed from hydrophilic to hydrophobic. When the base temperature was 200°C, not only was the sheet resistance of the sample with coating time of 15 minutes about 4.6 times that of the sheet resistance of the sample at room temperature, but also the quality of the copper film on the wood surface was better than that at room temperature. The copper film was mainly composed of small particles with a compact arrangement.

Mechanical Properties of Platinum Films on Silicon and Glass Determined by Ultra-Microindentation

1994 ◽  
Vol 356 ◽  
Author(s):  
Jaroslav Mencik ◽  
Michael V. Swain
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Magnetron Sputtering ◽  
Film Thickness ◽  
Composite Film ◽  
Data Evaluation ◽  
Contact Radius ◽  
Berkovich Indenter ◽  
Substrate Properties ◽  
Film Substrate

AbstractPlatinum films of thickness 0.5 - 1.2 - 3.0 μm, deposited by magnetron sputtering onto glass and silicon, were investigated using ultra-microindentation. The tests were done with a pointed (Berkovich) indenter. The values of the hardness and elastic modulus of the composite “film + substrate” and the substrates alone were obtained for various loads and depths of penetration, and used to evaluate the hardness and elastic modulus of the films. The use of various film thicknesses and substrates has enabled us to investigate in more detail the influence of the contact radius/contact depth compared to the film thickness as well as the substrate properties on the total indentation behaviour. Various approaches to the data evaluation are discussed in the paper.

scholarly journals Experimental Analysis of the Mechanical Properties and Resistivity of Tectonic Coal Samples with Different Particle Sizes

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2303
Author(s):  
Congyu Zhong ◽  
Liwen Cao ◽  
Jishi Geng ◽  
Zhihao Jiang ◽  
Shuai Zhang
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Compressive Strength ◽  
Elastic Modulus ◽  
Uniaxial Compressive Strength ◽  
Coalbed Methane ◽  
Coal Sample ◽  
Fine Particles ◽  
Particle Sizes ◽  
Tectonic Coal

Because of its weak cementation and abundant pores and cracks, it is difficult to obtain suitable samples of tectonic coal to test its mechanical properties. Therefore, the research and development of coalbed methane drilling and mining technology are restricted. In this study, tectonic coal samples are remodeled with different particle sizes to test the mechanical parameters and loading resistivity. The research results show that the particle size and gradation of tectonic coal significantly impact its uniaxial compressive strength and elastic modulus and affect changes in resistivity. As the converted particle size increases, the uniaxial compressive strength and elastic modulus decrease first and then tend to remain unchanged. The strength of the single-particle gradation coal sample decreases from 0.867 to 0.433 MPa and the elastic modulus decreases from 59.28 to 41.63 MPa with increasing particle size. The change in resistivity of the coal sample increases with increasing particle size, and the degree of resistivity variation decreases during the coal sample failure stage. In composite-particle gradation, the proportion of fine particles in the tectonic coal sample increases from 33% to 80%. Its strength and elastic modulus increase from 0.996 to 1.31 MPa and 83.96 to 125.4 MPa, respectively, and the resistivity change degree decreases. The proportion of medium particles or coarse particles increases, and the sample strength, elastic modulus, and resistivity changes all decrease.

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