Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Possibilities for strengthening hydroxyapatite ceramics.

Z Z Zyman1, I G Ivanov, V I Glushko

  • 1Physics of Solids Department, Physics Faculty, Kharkov State University, Ukraine.

Journal of Biomedical Materials Research
|June 5, 1999
PubMed
Summary

Gas release during hydroxyapatite (HA) sintering hinders densification and mechanical properties. Pre-treatment and optimized processing significantly improve HA ceramic quality.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

[Experience of anticipatory therapy with IL-6 receptor inhibitors and perspectives for its use in the evolution of COVID-19].

Terapevticheskii arkhiv·2022
Same author

[The value of bone mineral density assessment by dual-energy x-ray absorptiometry for prediction of cardiovascular mortality in patients treated with hemodialysis].

Terapevticheskii arkhiv·2020
Same author

Probing the uniformity of hydrogen intercalation in quasi-free-standing epitaxial graphene on SiC by micro-Raman mapping and conductive atomic force microscopy.

Nanotechnology·2019
Same author

[Structural changes of eye chorioretinal complex after total cerebral ischemia and their correction].

Morfologiia (Saint Petersburg, Russia)·2012
Same author

Structural and compositional features of amorphous calcium phosphate at the early stage of precipitation.

Journal of materials science. Materials in medicine·2009
Same author

Thermal impurity reactions and structural changes in slightly carbonated hydroxyapatite.

Journal of materials science. Materials in medicine·2009

Area of Science:

  • Materials Science
  • Ceramic Engineering
  • Biomaterials

Background:

  • Conventional sintering of hydroxyapatite (HA) powder pressings is affected by gas release during heating.
  • This gas evolution impedes shrinkage and negatively impacts the final ceramic's microhardness and density.

Purpose of the Study:

  • To investigate the physics of gas release during HA powder sintering.
  • To identify methods for improving the density, microhardness, and compressive strength of HA ceramics.

Main Methods:

  • Studied gas release during heating and sintering of HA powder pressings.
  • Investigated the effect of powder dispersity and pre-sintering thermal treatment (degassing).
  • Developed and tested a composite technique involving mixed powder dispersities, specific pressing, pre-treatment, and controlled sintering conditions.

Related Experiment Videos

Main Results:

  • Gas release was observed to hinder or halt sintering in middle-dispersity HA powders.
  • Pre-sintering degassing improved density and microhardness.
  • Using fine powders eliminated the shrinkage-stop effect.
  • The developed composite technique yielded HA ceramics with near-theoretical density and homogeneous, enhanced microhardness and compressive strength.

Conclusions:

  • Optimizing powder characteristics and processing steps is crucial for high-quality HA ceramics.
  • A combination of mixed powder dispersity, pre-treatment, and moderate sintering conditions effectively overcomes sintering challenges.
  • The proposed methods significantly enhance the mechanical properties and structural integrity of hydroxyapatite ceramics.