Microstructure, surface morphology, and mechanical properties of nanocrystalline TiN/amorphous Si3N4 composite films synthesized by ion beam assisted deposition

2004 ◽  
Vol 95 (3) ◽  
pp. 1460-1467 ◽  
Author(s):  
C. H. Zhang ◽  
Z.-J. Liu ◽  
K. Y. Li ◽  
Y. G. Shen ◽  
J. B. Luo
Keyword(s):  
Mechanical Properties ◽  
Surface Morphology ◽  
Ion Beam ◽  
Composite Films ◽  
Ion Beam Assisted Deposition ◽  
Amorphous Si3n4 ◽  
Morphology And Mechanical Properties

Mechanical Properties of Nanocomposite TiN/Si3N4 Films Synthesized by Ion Beam Assisted Deposition (IBAD)

2003 ◽  
Vol 125 (2) ◽  
pp. 445-447 ◽  
Author(s):  
Chenhui Zhang ◽  
Jianbin Luo ◽  
Wenzhi Li ◽  
Darong Chen
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Ion Beam ◽  
Nanocomposite Coatings ◽  
Ion Beam Assisted Deposition ◽  
Aisi 52100 ◽  
Aisi 52100 Steel ◽  
Nanoindentation Hardness ◽  
Si3n4 Film ◽  
Amorphous Si3n4

Nanocomposite coatings of TiN/Si3N4 have been prepared by ion beam assisted deposition (IBAD): simultaneous sputtering of Ti and Si targets and film bombardment by N2+ ions at 1000 eV. The Si/Ti ratio in the film varies from 0 to 0.9. The coatings are composed of amorphous Si3N4 and TiN nanocrystals with grain size of several nanometers. Such nanocomposites exhibit improved mechanical properties in comparison with TiN or Si3N4 deposited under the same conditions. The nanoindentation hardness of TiN/Si3N4 film at the Si/Ti ratio of 0.3 reaches a maximum of 42 GPa, compared with 22 GPa for TiN and 18 GPa for Si3N4. The wear resistance of AISI 52100 steel coated with these nanocomposite coatings is increased about three times.

Electrospinning/Spray: The Interaction between Graphene Nanosheets and Different Nanofibers

2020 ◽  
Vol 841 ◽  
pp. 82-86
Author(s):  
Yang Zhong Chen ◽  
Han Wang ◽  
Fei Yu Fang ◽  
Hui Mei ◽  
Li Wang
Keyword(s):  
Mechanical Properties ◽  
Surface Morphology ◽  
Mechanical Test ◽  
Graphene Nanosheets ◽  
Strain Sensors ◽  
Synergic Effect ◽  
Electrospun Nanofiber ◽  
Promising Candidate ◽  
Tensile Tester ◽  
Morphology And Mechanical Properties

The electrospun nanofiber/graphene composites is a promising candidate in the field of flexible strain sensors due to the synergic effect of graphene and the nanofibers. It is an effective way to synthesize a uniform graphene-embedded film by simultaneously electrospinning nanofibers and electrospraying graphene nanosheets. In this paper, we prepare two specimens of different materials to study the interaction between graphene nanosheets and nanofibers under the same process parameters, such as thermoplastic urethane (TPU), polyacrylonitrile (PAN). Then, morphology and mechanical properties are used to characterize the interaction. The mechanical test was conducted by the tensile tester, and the surface morphology of electrospun nanofibrous films was observed through a microscope. By comparing these results, the properties of the graphene nanosheets embedded to different nanofibers are explored. This study provides a good way to select an appropriate nanofiber matrix for the application in flexible strain sensors.

Study on Morphology Features and Mechanical Properties of Nanofibers Films Prepared by Different Composite Electrospinning Methods

2020 ◽  
Vol 841 ◽  
pp. 70-75
Author(s):  
Chao He ◽  
Han Wang ◽  
Li Xiong Huang ◽  
Ping Wang ◽  
Wei Gao
Keyword(s):  
Mechanical Properties ◽  
Thermoplastic Polyurethane ◽  
Composite Films ◽  
Thickness Measurement ◽  
Important Process ◽  
Composite Methods ◽  
Wide Range ◽  
The Given ◽  
Composite Mode ◽  
Morphology And Mechanical Properties

Electrospinning is an important method for preparing nanofibers, which are highly promising for applications in a wide range of fields such as purification/filtration, photoelectric devices, battery separators, catalysis and tissue engineering. These applications often use composite materials and have specific requirements for mechanical properties. Therefore, how to get nanofibers films with ideal mechanical properties by changing the composite mode is an important process problem for the given two or more materials. Based on the far-field electrospinning, this study selected polyacrylonitrile (PAN) and thermoplastic polyurethane (TPU) to explore the differences of three composite methods: mixed spinning, multi-nozzle simultaneous spinning and superposition spinning. Three kinds of analysis can be seen in this study, which include morphology features, thickness measurement and mechanical properties of samples. Multi-nozzle simultaneous spinning has very limited changes. Mixed spinning and superposition spinning are beneficial to the improvement of nanofibers films morphology and mechanical properties. Among them, the composite films through superposition spinning are thinner.

scholarly journals Co-Electrodeposition of Au–TiO2 Nanocomposite and the Micro-Mechanical Properties

Electrochem ◽  
2020 ◽  
Vol 1 (4) ◽  
pp. 388-393
Author(s):  
Yu-An Chien ◽  
Tso-Fu Mark Chang ◽  
Chun-Yi Chen ◽  
Daisuke Yamane ◽  
Hiroyuki Ito ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Yield Strength ◽  
Surface Morphology ◽  
Composite Film ◽  
Composite Films ◽  
Compression Tests ◽  
Tio2 Content ◽  
Micro Pillars ◽  
Structure And Microstructure ◽  
Electrolyte Effects

Strengthening of electrodeposited Au-based materials is achieved by co-electrodeposition with TiO2 nanoparticles dispersed in a sulfide-based gold electrolyte. TiO2 content in the composite film is adjusted by concentration of the TiO2 in the gold electrolyte. Effects of the TiO2 content on surface morphology, crystalline structure and microstructure of the composite film are investigated. Mechanical properties of the Au–TiO2 composite films are evaluated by micro-Vickers hardness and micro-compression tests. The hardness increases from 135 to 207 HV when the TiO2 content is increased from 0 to 2.72 wt%. Specimens used in the micro-compression test are micro-pillars fabricated from the composite film, and the yield strength reaches 0.84 GPa by incorporating 2.72 wt% TiO2 into the film.

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