Sintering of hydroxyapatite/yttria stabilized zirconia nanocomposites under nitrogen gas for dental materials

C. H. Leong, Andanastuti Muchtar, C. Y. Tan, Masfueh Razali, Noor Faeizah Amat

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

This study aims to determine the effect of adding 3 mol% yttria stabilized zirconia (3YSZ) in hydroxyapatite (HA) and sintering HA/3YSZ nanocomposites under nitrogen gas on HA decomposition. This paper presents the relationship between microstructure and mechanical properties of HA/3YSZ nanocomposites. Gas pressure and conventional sintering were performed on HA/3YSZ nanocomposites containing different amounts of 3YSZ (i.e., 0, 0.5, 1, and 7 wt%) at 1250°C. The phase stability, morphology, relative density, and microhardness of the HA/3YSZ nanocomposites were investigated. The phase stability of the HA/3YSZ nanocomposites was affected by adding different amounts of 3YSZ. Overall, gas pressure sintering leads to the formation of greater grain size compared with the conventional sintering method. The severe HA decomposition and the presence of the porosity in HA/7 wt% 3YSZ have led to deterioration in relative density and microhardness. In this study, HA/0.5 wt% 3YSZ with gas pressure sintering exhibited the optimum microstructure with the highest relative density (97%) and microhardness (3.93 GPa).

Original languageEnglish
Article number367267
JournalAdvances in Materials Science and Engineering
Volume2014
DOIs
Publication statusPublished - 2014

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Dental materials
Dental Materials
Yttria stabilized zirconia
Durapatite
Hydroxyapatite
Nanocomposites
Nitrogen
Sintering
Gases
Microhardness
Phase stability
Decomposition
Microstructure
Deterioration
Porosity

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)

Cite this

Sintering of hydroxyapatite/yttria stabilized zirconia nanocomposites under nitrogen gas for dental materials. / Leong, C. H.; Muchtar, Andanastuti; Tan, C. Y.; Razali, Masfueh; Amat, Noor Faeizah.

In: Advances in Materials Science and Engineering, Vol. 2014, 367267, 2014.

Research output: Contribution to journalArticle

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abstract = "This study aims to determine the effect of adding 3 mol{\%} yttria stabilized zirconia (3YSZ) in hydroxyapatite (HA) and sintering HA/3YSZ nanocomposites under nitrogen gas on HA decomposition. This paper presents the relationship between microstructure and mechanical properties of HA/3YSZ nanocomposites. Gas pressure and conventional sintering were performed on HA/3YSZ nanocomposites containing different amounts of 3YSZ (i.e., 0, 0.5, 1, and 7 wt{\%}) at 1250°C. The phase stability, morphology, relative density, and microhardness of the HA/3YSZ nanocomposites were investigated. The phase stability of the HA/3YSZ nanocomposites was affected by adding different amounts of 3YSZ. Overall, gas pressure sintering leads to the formation of greater grain size compared with the conventional sintering method. The severe HA decomposition and the presence of the porosity in HA/7 wt{\%} 3YSZ have led to deterioration in relative density and microhardness. In this study, HA/0.5 wt{\%} 3YSZ with gas pressure sintering exhibited the optimum microstructure with the highest relative density (97{\%}) and microhardness (3.93 GPa).",
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