Journal ArticleDOI
Nanocrystalline hydroxyapatite with simultaneous enhancements in hardness and toughness.
Jiwen Wang,Leon L. Shaw +1 more
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TLDR
It is demonstrated that the hardness of HA follows the Hall-Petch relationship as the grain size decreases from sub-micrometers to nanometers, and the toughness of HA increases by as much as 74% because of the enhanced crack deflection associated with a transition from transgranular to intergranular cracking.About:
This article is published in Biomaterials.The article was published on 2009-12-01. It has received 150 citations till now. The article focuses on the topics: Hardness & Toughness.read more
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Synthetic nacre by predesigned matrix-directed mineralization
Li-Bo Mao,Huai-Ling Gao,Hong-Bin Yao,Lei Liu,Lei Liu,Helmut Cölfen,Gang Liu,Si-Ming Chen,Shi-Kuo Li,You-Xian Yan,Yang-Yi Liu,Shu-Hong Yu +11 more
TL;DR: A mesoscale “assembly-and-mineralization” approach inspired by the natural process in mollusks is described to fabricate bulk synthetic nacre that highly resembles both the chemical composition and the hierarchical structure of natural nacre.
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Biomimetic approaches in bone tissue engineering: Integrating biological and physicomechanical strategies.
Marc A. Fernandez-Yague,Sunny Akogwu Abbah,Laoise M. McNamara,Dimitrios I. Zeugolis,Abhay Pandit,Manus J.P. Biggs +5 more
TL;DR: This review will focus on biological and physicomechanical considerations currently being explored in bone tissue engineering.
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Nanodimensional and Nanocrystalline Apatites and Other Calcium Orthophosphates in Biomedical Engineering, Biology and Medicine
TL;DR: The application and prospective use of nanodimensional and nanocrystalline calcium orthophosphates for a clinical repair of damaged bones and teeth are also known as discussed by the authors, starting from the synthesis and characterization to biomedical and clinical applications.
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Current Progress in Bioactive Ceramic Scaffolds for Bone Repair and Regeneration
Chengde Gao,Youwen Deng,Pei Feng,Zhongzheng Mao,Pengjian Li,Bo Yang,Junjie Deng,Yiyuan Cao,Cijun Shuai,Shuping Peng +9 more
TL;DR: The types and characters of bioactive ceramics, the fabrication methods for nanostructure and hierarchically porous structure, typical toughness methods for ceramic scaffold and corresponding mechanisms such as fiber toughness, whisker toughness and particle toughness are summarized.
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Boron nitride nanotube reinforced hydroxyapatite composite: mechanical and tribological performance and in-vitro biocompatibility to osteoblasts.
TL;DR: HA-BNNT composite is envisioned as a potential material for stronger orthopedic implants and offers excellent mechanical properties-120% increment in elastic modulus, 129% higher hardness and 86% more fracture toughness, as compared to HA.
References
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Journal ArticleDOI
A Critical Evaluation of Indentation Techniques for Measuring Fracture Toughness: I, Direct Crack Measurements
TL;DR: In this paper, the application of indentation techniques to the evaluation of fracture toughness is examined critically, in two parts: the first part is focused on an approach which involves direct measurement of Vickers-produced radial cracks as a function of the indentation load.
A Critical evaluation of indentation techniques for measuring fracture toughness
TL;DR: In this paper, the application of indentation techniques to the evaluation of fracture toughness is examined critically, in two parts: the first part is focused on an approach which involves direct measurement of Vickers-produced radial cracks as a function of the indentation load.
Journal ArticleDOI
The deformation of plastically non-homogeneous materials
TL;DR: The geometrically necessary dislocations as discussed by the authors were introduced to distinguish them from the statistically storages in pure crystals during straining and are responsible for the normal 3-stage hardening.
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Fracture Toughness Determinations by Indentation
Anthony G. Evans,E. A. Charles +1 more
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Softening of nanocrystalline metals at very small grain sizes
TL;DR: In this paper, the deformation of nanocrystalline copper has been studied and it is shown that the hardness and yield stress of the material typically increase with decreasing grain size, a phenomenon known as the reverse Hall-Petch effect.