Characterization of the Naked Mole Rat Incisors: Chemical Composition, Microstructure and Mechanical Properties

2021 ◽  
pp. 1-10
Author(s):  
Hongyan Qi ◽  
Guixiong Gao ◽  
Huixin Wang ◽  
Yunhai Ma ◽  
Hubiao Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Lamellar Structure ◽  
Three Dimensional ◽  
Microstructure And Mechanical Properties ◽  
Inorganic Matter ◽  
Mole Rat ◽  
Naked Mole Rat ◽  
Reticular Structure

The naked mole rat incisors (NMRI) exhibit excellent mechanical properties, which makes it a good prototype for design and fabrication of bionic mechanical systems and materials. In this work, we characterized the chemical composition, microstructure and mechanical properties of NMRI, and further compared these properties with the laboratory rat incisors (LRI). We found that (1) Enamel and dentin are composed of organic matter, inorganic matter and water. The ratio of Ca/P in NMRI enamel is higher than that of LRI enamel. (2) The dentin has a porous structure. The enamel has a three-dimensional reticular structure, which is more complex, regular and denser than the lamellar structure of LRI enamel. (3) Enamel has anisotropy. Its longitudinal nano-hardness is greater than that of transverse nano-hardness, and both of them are higher than that of LRI enamel. Their nano-hardness and elastic modulus increase with the increment of distance from the enamel-dentin boundary. The nano-hardness of dentin is smaller than that of enamel. The chemical composition and microstructure are considered to be the reasons for the excellent properties of NMRI. The chemical composition and unique microstructure can provide inspiration and guidelines for the design of bionic machinery and materials.

Development and Characterization of Microstructure and Mechanical Properties of Heat-Treated Zr–2.5Nb Alloy for AHWR Pressure Tubes

2013 ◽  
Vol 2 (1) ◽  
pp. 20120033
Author(s):  
R. N. Singh ◽  
A. K. Bind ◽  
J. B. Singh ◽  
J. K. Chakravartty ◽  
V. Thomas Paul ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Microstructure And Mechanical Properties ◽  
Heat Treated ◽  
Pressure Tubes

Characterization of Microstructure and Mechanical Properties of Mg-Y-Zn Alloys with Respect to Different Content of LPSO Phase

2017 ◽  
Vol 20 (1) ◽  
pp. 1700396 ◽  
Author(s):  
Klaudia Horváth ◽  
Daria Drozdenko ◽  
Stanislav Daniš ◽  
Gerardo Garcés ◽  
Kristián Máthis ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Lpso Phase ◽  
Microstructure And Mechanical Properties ◽  
Different Content ◽  
Zn Alloys

Microstructure and Mechanical Properties of Al-12.6%Si Composite Reinforced by Al63Cu25Fe12Quasicrystal

2012 ◽  
Vol 182-183 ◽  
pp. 162-166
Author(s):  
Can Can Li ◽  
Hao Ran Geng ◽  
Zhen Yuan Li ◽  
Hai Ou Qin
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Cooling Rate ◽  
Quasicrystalline Phase ◽  
Melt Temperature ◽  
Microstructure And Mechanical Properties

In this paper, Al-12.6%Si/Al63Cu25Fe12 composites were fabricated by method of casting. The microstructure and chemical composition of Al63Cu25Fe12 quasicrystal alloy and Al-12.6%Si alloy reinforced by the quasicrystal were studied, and the mechanical properties of Al-12.6%Si composite were also measured. The results show that almost single quasicrystalline phases exist in the samples which are cast with the 1300°C melt. Quickly enough cooling rate and appropriate melt temperature are necessary for the formation of the quasicrystalline phase. In addition, Al-12.6%Si composite has optimal mechanical properties when the amount of Al63Cu25Fe12 quasicrystal is 3 wt%.

The structure, composition and mechanical properties of the skeleton of the naked mole-rat (Heterocephalus glaber)

Bone ◽  
2019 ◽  
Vol 128 ◽  
pp. 115035 ◽  
Author(s):  
Shira Carmeli-Ligati ◽  
Anna Shipov ◽  
Maïtena Dumont ◽  
Susanne Holtze ◽  
Thomas Hildebrandt ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heterocephalus Glaber ◽  
Mole Rat ◽  
Naked Mole Rat

scholarly journals Microstructural and Mechanical Characterization of Multilayered Iron Electrodeposits

2011 ◽  
Vol 409 ◽  
pp. 474-479 ◽  
Author(s):  
C. Chan ◽  
J.L. McCrea ◽  
G. Palumbo ◽  
Uwe Erb
Keyword(s):  
Mechanical Properties ◽  
Columnar Structure ◽  
Multilayered Structure ◽  
Structure Design ◽  
Coarse Grained ◽  
Fine Grained ◽  
Microstructure And Mechanical Properties ◽  
Fine Grained Structure ◽  
Iron Coatings

Monolithic and multilayered iron electrodeposits were successfully synthesized by the pulse plating electrodeposition method. Electron microscopy and Vickers microhardness measurements were used to investigate the microstructure and mechanical properties of the iron electrodeposits produced. Two types of monolithic iron coatings were produced, one with a coarse grained, columnar structure and the other with an ultra-fine grained structure. Hall-Petch type grain size strengthening was observed in these monolithic coatings. Multilayered iron coatings composed of alternating layers of coarse grained and fine grained structures were also produced. The hardness value of the multilayered coatings falls between the hardness values for the two types of monolithic coatings produced. This study has demonstrated the possibility of applying a multilayered structure design to tailor the microstructure and mechanical properties of electrodeposited iron coatings.

Characterization of Precipitate Distributions in Modified S5 Tool Steels

1997 ◽  
Vol 3 (S2) ◽  
pp. 691-692
Author(s):  
K.C. Hsieh ◽  
E.A. Kenik
Keyword(s):  
Mechanical Properties ◽  
Cooling Rate ◽  
Tool Steel ◽  
Heat Treatments ◽  
Tool Steels ◽  
Tempered Martensite ◽  
Microstructure And Mechanical Properties

There has been increasing interest from industry to characterize the different precipitate distributions in ferrous materials to account for different mechanical properties that are observed. For this study, two different heat treatments were chosen for the experimental S5 tool steel, modified to have 0.24 wt% C. Alloy S5-1 received 1 hour of austenitizing at 970°C, was quenched at rate of 140°C/s and tempered for 1 hour at 200°C. Alloy S5-2 received 40 minutes of austenitizing at 940°C, was quenched at rate of 16°C/s and tempered for 1 hour at 200 °C. In this relatively low hardenability steel, both S5-1 and S5-2 show mixed microstructures of tempered martensite and bainite (Fig. 1, 2). Not surprisingly, the slower cooling rate for S5-2 created an alloy with inferior microstructure and mechanical properties. Even though these differences in precipitate distributions, could not directly account for differences in mechanical properties, it is of interest to study how the different heat treatments affected the precipitate distributions in S5-1 and S5-2.

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