Role of graphene in enhancing the mechanical properties of TiO2/graphene heterostructures

Nanoscale ◽  
2017 ◽  
Vol 9 (32) ◽  
pp. 11678-11684 ◽  
Author(s):  
Changhong Cao ◽  
Sankha Mukherjee ◽  
Jian Liu ◽  
Biqiong Wang ◽  
Maedeh Amirmaleki ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Stress ◽  
Failure Initiation ◽  
Young’S Moduli ◽  
Strong Adhesion

The inclusion of graphene in TiO2/graphene hetero-films is shown to exhibit strong adhesion and enable films to sustain high stress at the point of failure initiation as well as significantly enhance their Young's moduli for films below 3 nm.

Nano-Mechanical Investigation of the Byssal Cuticle, a Protective Coating of a Bio-Elastomer

2004 ◽  
Vol 841 ◽  
Author(s):  
Niels Holten-Andersen ◽  
Nelle Slack ◽  
Frank Zok ◽  
J. Herbert Waite
Keyword(s):  
Mechanical Properties ◽  
Protective Coating ◽  
Potential Role ◽  
Byssal Thread ◽  
Nano Indentation ◽  
The Core ◽  
Young’S Moduli ◽  
Mechanical Investigation ◽  
Unique Capability

ABSTRACTThe mechanical properties of the mussel byssal thread have been investigated via nano-indentation, with the emphasis on the differences between the cuticle and the fibrous interior. The cuticle hardness was found to be 30–40% higher than that of the underlying fibrous interior. In contrast, the Young's moduli in the two regions were virtually identical to one another. Elemental analysis via energy dispersive spectroscopy indicated surprisingly high levels of Al and Br in the cuticle considering the low amounts found in seawater. A potential role of Al in byssal thread mechanics is discussed in light of the unique capability of the cuticle to accommodate strains of 70% by the underlying fibrils in the core without delamination.

Nano-Mechanical Investigation of the Byssal Cuticle, a Protective Coating of a BioElastomer

2004 ◽  
Vol 844 ◽  
Author(s):  
Niels Holten-Andersen ◽  
Nelle Slack ◽  
Frank Zok ◽  
J. Herbert Waite
Keyword(s):  
Mechanical Properties ◽  
Protective Coating ◽  
Potential Role ◽  
Byssal Thread ◽  
Nano Indentation ◽  
The Core ◽  
Young’S Moduli ◽  
Mechanical Investigation ◽  
Unique Capability

ABSTRACTThe mechanical properties of the mussel byssal thread have been investigated via nano-indentation, with the emphasis on the differences between the cuticle and the fibrous interior. The cuticle hardness was found to be 30–40% higher than that of the underlying fibrous interior. In contrast, the Young's moduli in the two regions were virtually identical to one another. Elemental analysis via energy dispersive spectroscopy indicated surprisingly high levels of Al and Br in the cuticle considering the low amounts found in seawater. A potential role of Al in byssal thread mechanics is discussed in light of the unique capability of the cuticle to accommodate strains of 70% by the underlying fibrils in the core without delamination.

scholarly journals Role of carbon and nitrogen in the improvement of corrosion resistance of new powder metallurgy Co-Cr-Mo alloys

2020 ◽  
Vol 38 (3) ◽  
pp. 273-286 ◽  
Author(s):  
Cristina Garcia-Cabezon ◽  
Celia Garcia-Hernandez ◽  
Maria L. Rodriguez-Mendez ◽  
Gemma Herranz ◽  
Fernando Martin-Pedrosa
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Powder Metallurgy ◽  
Nitrogen Content ◽  
Powder Metallurgy Technique ◽  
Carbon And Nitrogen ◽  
Physiological Conditions ◽  
Carbon And Nitrogen Content ◽  
Astm F75

AbstractMicrostructural changes that result in relevant improvements in mechanical properties and electrochemical behavior can be induced using different sintering conditions of ASTM F75 cobalt alloys during their processing using powder metallurgy technique. It has been observed that the increase in carbon and nitrogen content improves corrosion resistance and mechanical properties as long as the precipitation of carbides and nitrides is avoided, thanks to the use of rapid cooling in water after the sintering stage. In addition, the reduction of the particle size of the powder improves hardness and resistance to corrosion in both acid medium with chlorides and phosphate-buffered medium that simulates the physiological conditions for its use as a biomaterial. These results lead to increased knowledge of the role of carbon and nitrogen content in the behavior displayed by the different alloys studied.

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