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c-axis preferential orientation of hydroxyapatite accounts for the high wear resistance of the teeth of black carp (Mylopharyngodon piceus)
Fu JM; He C; Xia B; Li Y; Feng Q; Yin QF; Shi XH(施兴华); Feng X; Wang HT; Yao HM; Yao, HM (reprint author), Hong Kong Polytech Univ, Dept Mech Engn, Kowloon, Hong Kong, Peoples R China.
Source PublicationSCIENTIFIC REPORTS
2016
Volume6Pages:23509
ISSN2045-2322
AbstractBiological armors such as mollusk shells have long been recognized and studied for their values in inspiring novel designs of engineering materials with higher toughness and strength. However, no material is invincible and biological armors also have their rivals. In this paper, our attention is focused on the teeth of black carp (Mylopharyngodon piceus) which is a predator of shelled mollusks like snails and mussels. Nanoscratching test on the enameloid, the outermost layer of the teeth, indicates that the natural occlusal surface (OS) has much higher wear resistance compared to the other sections. Subsequent X-ray diffraction analysis reveals that the hydroxyapatite (HAp) crystallites in the vicinity of OS possess c-axis preferential orientation. The superior wear resistance of black carp teeth is attributed to the c-axis preferential orientation of HAp near the OS since the (001) surface of HAp crystal, which is perpendicular to the c-axis, exhibits much better wear resistance compared to the other surfaces as demonstrated by the molecular dynamics simulation. Our results not only shed light on the origin of the good wear resistance exhibited by the black carp teeth but are of great value to the design of engineering materials with better abrasion resistance.
DOI10.1038/srep23509
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Indexed BySCI
Language英语
WOS IDWOS:000372574800001
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
Funding OrganizationSupports for this work from the Early Career Scheme (ECS) of Hong Kong RGC (No. 533312) and the Opening Fund of State Key Laboratory of Nonlinear Mechanics from Institute of Mechanics, CAS are acknowledged. HW acknowledges the financial support from National Natural Science Foundation of China (No. 11321202). The authors thank Dr. Zhiping Xu, Dr. Kaimin Shih for helpful discussions on MD simulation and XRD analysis, respectively. We also acknowledge Dr. Vengatesen Thiyagarajan's group and Dr. Xinrui Niu's group for providing assistance in FESEM imaging and nanoscratching tests respectively.
DepartmentLNM微结构计算力学(筹)
Classification一类
RankingFalse
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/59580
Collection非线性力学国家重点实验室
Corresponding AuthorYao, HM (reprint author), Hong Kong Polytech Univ, Dept Mech Engn, Kowloon, Hong Kong, Peoples R China.
Recommended Citation
GB/T 7714
Fu JM,He C,Xia B,et al. c-axis preferential orientation of hydroxyapatite accounts for the high wear resistance of the teeth of black carp (Mylopharyngodon piceus)[J]. SCIENTIFIC REPORTS,2016,6:23509.
APA Fu JM.,He C.,Xia B.,Li Y.,Feng Q.,...&Yao, HM .(2016).c-axis preferential orientation of hydroxyapatite accounts for the high wear resistance of the teeth of black carp (Mylopharyngodon piceus).SCIENTIFIC REPORTS,6,23509.
MLA Fu JM,et al."c-axis preferential orientation of hydroxyapatite accounts for the high wear resistance of the teeth of black carp (Mylopharyngodon piceus)".SCIENTIFIC REPORTS 6(2016):23509.
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