Structure and Nanohardness of Compact Hydroxyapatite-Based Ceramics
- Authors: Ievlev V.M.1,2, Kostyuchenko A.V.3, Kochlar G.S.1, Putlyaev V.I.1
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Affiliations:
- Moscow State University
- Voronezh State University
- Voronezh State Technical University
- Issue: Vol 55, No 10 (2019)
- Pages: 1054-1060
- Section: Article
- URL: https://journals.rcsi.science/0020-1685/article/view/158784
- DOI: https://doi.org/10.1134/S0020168519100054
- ID: 158784
Cite item
Abstract
Abstract—The substructure of hydroxyapatite ceramics produced by cold-pressing nanocrystalline hydroxyapatite powder, followed by annealing for 1–12 h at 1150°C, has been studied by transmission electron microscopy, and the hardness and modulus of elasticity of the ceramics have been determined using nanoindentation. The results demonstrate that the compaction process leads to coalescence of nanoparticles of the starting powder, which ensures a minimum hardness of the compact with a 50% relative density. The hardness and modulus of elasticity of HA ceramics increase with increasing firing time as a consequence of improvement of its substructure (an increase in grain size and a decrease in pore size and density).
About the authors
V. M. Ievlev
Moscow State University; Voronezh State University
Author for correspondence.
Email: rnileme@mail.ru
Russian Federation, Moscow, 119991; Universitetskaya pl. 1, Voronezh, 394006
A. V. Kostyuchenko
Voronezh State Technical University
Email: rnileme@mail.ru
Russian Federation, Moskovskii pr. 14, Voronezh, 394026
G. S. Kochlar
Moscow State University
Email: rnileme@mail.ru
Russian Federation, Moscow, 119991
V. I. Putlyaev
Moscow State University
Email: rnileme@mail.ru
Russian Federation, Moscow, 119991
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