Helicoidal-Rounded-Hole Microstructure of Mature Shankbone

2011 ◽  
Vol 460-461 ◽  
pp. 652-655
Author(s):  
Bin Chen ◽  
Ji Luo ◽  
Quan Yuan
Keyword(s):  
Fracture Toughness ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Protein Matrix ◽  
Pullout Force ◽  
Sem Observation ◽  
Collagen Protein ◽  
Scanning Electron

Scanning electron microscope (SEM) observation on a mature shankbone shows that the bone is a kind of bioceramic composite consisting of hydroxyapatite sheets and collagen protein matrix. The observation also shows that there are many holes in the bone and that the hydroxyapatite sheets near by these holes helicoidally round these holes forming a kind of helicoidally-rounded-hole microstructure (HRHM). The maximum pullout force of the HRHM is investigated and compared with that of non-helicoidally-rounded-hole microstructure (NHRHM). It shows that the HRHM could markedly increase the maximum pullout force of the hydroxyapatite sheets compared to the NHRHM and therefore enhance the fracture toughness of the bone.

Intercrossed Microstructures of Hydroxyapatite Sheets of Tibia Bone

2011 ◽  
Vol 460-461 ◽  
pp. 648-651
Author(s):  
Bin Chen ◽  
Quan Yuan ◽  
Ji Luo
Keyword(s):  
Fracture Toughness ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Protein Matrix ◽  
Pullout Force ◽  
Tibia Bone ◽  
Collagen Protein ◽  
Scanning Electron

The observation of scanning electron microscope (SEM) showed that a tibia bone is a kind of bioceramic composite consisting of hydroxyapatite layers and collagen protein matrix. All the hydroxyapatite layers are parallel with the surface of the bone and consist of numerous hydroxyapatite sheets. The observation also showed there is a kind of intercrossed microstructure of the hydroxyapatite sheets. In which the hydroxyapatite sheets in an arbitrary hydroxyapatite layer make a large intercrossed angle with the hydroxyapatite sheets in its adjacent hydroxyapatite layers. The maximum pullout force of the intercrossed microstructure, which is closely related to the fracture toughness of the bone, was investigated and compared with that of the parallel microstructure of the sheets through their representative models. Result indicated that the maximum pullout force of the intercrossed microstructure is markedly larger than that of the parallel microstructure.

RESEARCH OF THE NANOMETER HELICOIDAL LAYUP OF RUFESCENS SHELL

2005 ◽  
Vol 19 (01n03) ◽  
pp. 577-579
Author(s):  
BIN CHEN ◽  
XIANG-HE PENG ◽  
JING-HONG FAN ◽  
WAN-LU WANG
Keyword(s):  
Fracture Toughness ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Ceramic Composite ◽  
Organic Matrix ◽  
Nanometer Scale ◽  
Pullout Force ◽  
Sem Observation ◽  
Scanning Electron

A scanning electron microscope (SEM) observation on a Rufescens shell shows that the shell is a bio-ceramic composite consisting of aragonite sheets with nanometer scale and organic matrix. These nano-aragonite sheets are arranged in the shell in the form of helicoidal layup. The reason of the excellent fracture toughness of the shell is analyzed based on the maximal pullout force of the helicoidal layup of the aragonite sheets in the shell.

Microstructure and Toughness Mechanism of Tooth

2011 ◽  
Vol 467-469 ◽  
pp. 567-570
Author(s):  
Bin Chen ◽  
Ji Luo ◽  
Quan Yuan ◽  
Jing Hong Fan
Keyword(s):  
Fracture Toughness ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Protein Matrix ◽  
Collagen Protein ◽  
Fine Microstructure ◽  
Representative Model ◽  
Toughness Mechanism ◽  
Parallel Distribution ◽  
Scanning Electron

Tooth is a kind of biomaterial in nature. It behaves favorable strength, stiffness and fracture toughness, which are closely related to its fine microstructure. The observation of scanning electron microscope (SEM) on a mature tooth shows that the tooth is a kind of natural bioceramic composite consisting of hydroxyapatite layers and collagen protein matrix. The observation also shows that the hydroxyapatite layers consist of long and thin hydroxyapatite sheets and that all the hydroxyapatite sheets are arranged in a kind of parallel distribution. The maximum pullout energy of the hydroxyapatite sheets, which is closely related to the fracture toughness of the tooth, is investigated based on the representative model of the parallel distribution. It shows that the long and thin shape as well as the parallel distribution of the hydroxyapatite sheets increase the maximum pullout energy and enhance the fracture toughness of the tooth.

Investigation to the Cross Microstructure of Hydroxyapatite Sheets of a Cannon Bone

2007 ◽  
Vol 361-363 ◽  
pp. 479-482
Author(s):  
Bin Chen ◽  
Xiang He Peng ◽  
Shi Tao Sun
Keyword(s):  
Mechanical Properties ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Protein Matrix ◽  
Pullout Force ◽  
Collagen Protein ◽  
The Cross ◽  
Scanning Electron

Bone possesses excellent mechanical properties, which are closely related to its favorable microstructures optimized by nature through many centuries. In this work, a scanning electron microscope (SEM) was used to observe the microstructures of a cannon bone. It showed that the bone is a kind of bioceramic composite consisting of hydroxyapatite layers and collagen protein matrix. The hydroxyapatite layers are composed of long and thin hydroxyapatite sheets. The hydroxyapatite sheets in different hydroxyapatite layers distribute along different orientations, which composes a kind of cross microstructure. The maximum pullout force of the cross microstructure was investigated and compared with that of the 0° microstructure with their representative models. The result indicated that the maximum pullout force of the cross microstructure is markedly larger than that of the 0° microstructure.

INTERSECTANT MICROSTRUCTURE OF HYDROXYAPATITE SHEETS OF SHANKBONE

2010 ◽  
Vol 24 (01n02) ◽  
pp. 201-208
Author(s):  
B. CHEN ◽  
J. LUO ◽  
J. G. WANG ◽  
Q. YUAN ◽  
J. H. FAN
Keyword(s):  
Mechanical Properties ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Protein Matrix ◽  
Pullout Force ◽  
Collagen Protein ◽  
Scanning Electron

Bone possesses excellent mechanical properties, which are closely related to its favorable microstructures optimized by nature through millions of years. In this work, a scanning electron microscope (SEM) was used to observe the microstructures of a shankbone. It showed that the bone is a kind of bioceramic composite consisting of hydroxyapatite layers and collagen protein matrix. The hydroxyapatite layers are further composed of long and thin hydroxyapatite sheets. The hydroxyapatite sheets in different hydroxyapatite layers distribute along different orientations, which composes a kind of intersectant microstructure. The maximum pullout force of the intersectant microstructure was investigated and compared with that of 0° microstructure with their representative models. The result indicated that the maximum pullout force of the intersectant microstructure is markedly larger than that of the 0° microstructure, which was experimentally verified.

Fiber-Complected and Reeled Microstructure of Insect Cuticle and Biomimetic Fabrication

2010 ◽  
Vol 447-448 ◽  
pp. 639-642
Author(s):  
Bin Chen ◽  
Quan Yuan ◽  
Ji Luo
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Ultimate Strength ◽  
Composite Laminate ◽  
Insect Cuticle ◽  
Protein Matrix ◽  
Sem Observation ◽  
Drilling Hole ◽  
Conventional Drilling ◽  
Scanning Electron

A scanning electron microscope (SEM) was used for the observation of the microstructures of a chafer cuticle. It showed that the cuticle is a kind of biocomposite consisting of complected chitin-fiber plies and sclerous protein matrix. The observation also showed that there are many holes in the cuticle and the complected fibers continuously reel these holes forming a kind of fiber-complected and reeled microstructure. Based on the SEM observation, a kind of biomimetic composite laminate with complected and reeled structure was fabricated with a special mould and process. The ultimate strength of the obtained biomimetic composite laminate was experimentally investigated and compared with that of the conventional drilling-hole composite laminate. It showed that the ultimate strength of the biomimetic composite laminate is markedly larger than that of the drilling-hole composite laminate.

Multiscale Microstructure of Chafer Cuticle

2011 ◽  
Vol 689 ◽  
pp. 144-148 ◽  
Author(s):  
Bin Chen ◽  
Quan Yuan ◽  
Da Gang Yin ◽  
Jing Hong Fan
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Microstructural Characteristic ◽  
Protein Matrix ◽  
Pullout Force ◽  
Pull Out ◽  
The Many ◽  
Representational Models ◽  
Large Magnification ◽  
Scanning Electron

The observation of scanning electron microscope (SEM) shows chafer cuticle is a kind of biocomposite which possesses multiscale microstructural characteristic. Under a relative small magnification of the SEM, it is found that the cuticle consists of chitin-fiber layers and protein matrix and that the fibers in two adjacent fiber layers have different directions, which composes a kind of fiber-crossed microstructure. Under a relative large magnification, it is observed that the many chitin fibers in the crossed fiber layers are furcated fibers, which exhibits a kind of fiber-furcated microstructure. The maximum pullout force of the fiber-furcated microstructure is investigated and compared with that of the fiber-non-furcated microstructure through their representational models. It shows that the maximum pull out force of the fiber-furcated structure is distinctly larger than that of the fiber-non-furcated structure.

Microstructure and Toughness Mechanism of Shank Bone

2009 ◽  
Vol 610-613 ◽  
pp. 1374-1377
Author(s):  
Bin Chen ◽  
Xiang He Peng ◽  
Shi Tao Sun ◽  
Ji Luo
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Organic Materials ◽  
Pullout Force ◽  
Sem Observation ◽  
Toughness Mechanism ◽  
Scanning Electron

Scanning electron microscope (SEM) observation was performed and showed that shank bone is a kind of bioceramic composite consisting of laminated hydroxyapatite and organic materials. The hydroxyapatite layers are parallel with the surface of the bone and consist of numerous thin and long hydroxyapatite sheet fibers. The hydroxyapatite sheet fibers in different hydroxyapatite make a little angle with each other and compose a kind of screwy microstructure. The maximum pullout force of the screwy microstructure was investigated and compared with that of parallel microstructure. It shows that the maximum pullout force of the screwy microstructure is markedly larger than that of the parallel microstructure, which was experimentally validated.

Interlaced Microstructures of Bone

2012 ◽  
Vol 185 ◽  
pp. 126-128
Author(s):  
Bin Chen ◽  
Quan Yuan ◽  
Da Gang Yin ◽  
Jian Guo Wang ◽  
Jing Hong Fan
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Pullout Force ◽  
Tibia Bone ◽  
Collagen Protein ◽  
Scanning Electron

The observation of scanning electron microscope (SEM) shows that a tibia bone is a kind of bioceramic composite consisting of hydroxyapatite layers and collagen protein matters. The hydroxyapatite layers are composed of hydroxyapatite sheets. The observation also shows there is a kind of interlaced microstructure of the hydroxyapatite sheets. The maximum pullout force of the interlaced microstructure was investigated and compared with that of the parallel microstructure. It is indicated that the maximum pullout force of the interlaced microstructure with a large interlaced angle is markedly larger than that of the parallel microstructure.

Lambdoidal Reinforced Microstructure of Mactridae Shell

2008 ◽  
Vol 368-372 ◽  
pp. 1695-1698
Author(s):  
Bin Chen ◽  
X. Peng ◽  
J. Fan ◽  
S. Sun
Keyword(s):  
Fracture Toughness ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Organic Matrix ◽  
Laminated Structure ◽  
Pullout Force ◽  
Scanning Electron

A scanning electron microscope (SEM) was used for observing the microstructures of a Mactridae shell. It showed that the shell is a kind of natural bioceramic composite, which consists of aragonite sheets and organic matrix with laminated structure. It also showed that there are various reinforced microstructures in the shell, which include a kind of lambdoidal one. The maximum pullout force of the lambdoidal reinforced microstructure, which is related to the fracture toughness of the shell, was analyzed and compared with that of a conventional 0°-structure based on their representative models. The result indicated that the maximum pullout force of the lambdoidal reinforced microstructure is markedly larger than that of the 0°-structure, which was experimentally verified.

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