Structure and Nanohardness of Compact Hydroxyapatite-Based Ceramics


Cite item

Full Text

Open Access Open Access
Restricted Access Access granted
Restricted Access Subscription Access

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

Supplementary files

Supplementary Files
Action
1. JATS XML

Copyright (c) 2019 Pleiades Publishing, Inc.