The effects of calcium-to-phosphorus ratio on the densification and mechanical properties of hydroxyapatite ceramic
Density (specific gravity); Elastic moduli; Fracture; Fracture toughness; Hydroxyapatite; Mechanical properties; Orthophosphoric acid; Particle size; Phosphorus; Powders; Precipitation (chemical); Sintering; Toughness; Vickers hardness; Calcium deficients; High temperature; Hydroxyapatite ceramics;...
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2023
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my.uniten.dspace-225792023-05-29T14:02:14Z The effects of calcium-to-phosphorus ratio on the densification and mechanical properties of hydroxyapatite ceramic Tan C.Y. Singh R. Teh Y.C. Tan Y.M. Yap B.K. 16029485400 41061958200 55877640300 55877494100 26649255900 Density (specific gravity); Elastic moduli; Fracture; Fracture toughness; Hydroxyapatite; Mechanical properties; Orthophosphoric acid; Particle size; Phosphorus; Powders; Precipitation (chemical); Sintering; Toughness; Vickers hardness; Calcium deficients; High temperature; Hydroxyapatite ceramics; Microstructural examination; NO decomposition; Relative density; Wet-chemical precipitation; Young's Modulus; Calcium In this work, hydroxyapatite (HA) powders were synthesized using calcium hydroxide Ca(OH)2 and orthophosphoric acid H3PO4 via wet chemical precipitation method in aqueous medium. Calcium-to-phosphorus (Ca/P) ratio was set to 1.57, 1.67, 1.87 that yield calcium-deficient HA, stoichiometric HA, and calcium-rich HA, respectively. These synthesized HA powders (having different Ca/P ratio) were characterized in terms of particle size and microstructural examination. Then, the densification and mechanical properties of the calcium-deficient HA, stoichiometric HA, and calcium-rich HA were evaluated from 1000 to 1350�C. Experimental results have shown that no decomposition of hydroxyapatite phase was observed for stoichiometric HA (Ca/P = 1.67) and calcium-deficient HA (Ca/P = 1.57) despite sintered at high temperature of 1300�C. However, calcium oxide (CaO) was detected for calcium-rich HA (Ca/P = 1.87) when samples sintered at the same temperature. The study revealed that the highest mechanical properties were found in stoichiometric HA samples sintered at 1100-1150�C, having relative density of ?99.8%, Young's modulus of ?120 GPa, Vickers hardness of ?7.23 GPa, and fracture toughness of ?1.22 MPam1/2. � 2014 The American Ceramic Society. Final 2023-05-29T06:02:14Z 2023-05-29T06:02:14Z 2015 Article 10.1111/ijac.12249 2-s2.0-84920696823 https://www.scopus.com/inward/record.uri?eid=2-s2.0-84920696823&doi=10.1111%2fijac.12249&partnerID=40&md5=4bb48db5dccce3bec6f632527fec88d5 https://irepository.uniten.edu.my/handle/123456789/22579 12 1 223 227 Blackwell Publishing Ltd Scopus |
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Density (specific gravity); Elastic moduli; Fracture; Fracture toughness; Hydroxyapatite; Mechanical properties; Orthophosphoric acid; Particle size; Phosphorus; Powders; Precipitation (chemical); Sintering; Toughness; Vickers hardness; Calcium deficients; High temperature; Hydroxyapatite ceramics; Microstructural examination; NO decomposition; Relative density; Wet-chemical precipitation; Young's Modulus; Calcium |
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16029485400 |
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16029485400 Tan C.Y. Singh R. Teh Y.C. Tan Y.M. Yap B.K. |
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Article |
| author |
Tan C.Y. Singh R. Teh Y.C. Tan Y.M. Yap B.K. |
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Tan C.Y. Singh R. Teh Y.C. Tan Y.M. Yap B.K. The effects of calcium-to-phosphorus ratio on the densification and mechanical properties of hydroxyapatite ceramic |
| author_sort |
Tan C.Y. |
| title |
The effects of calcium-to-phosphorus ratio on the densification and mechanical properties of hydroxyapatite ceramic |
| title_short |
The effects of calcium-to-phosphorus ratio on the densification and mechanical properties of hydroxyapatite ceramic |
| title_full |
The effects of calcium-to-phosphorus ratio on the densification and mechanical properties of hydroxyapatite ceramic |
| title_fullStr |
The effects of calcium-to-phosphorus ratio on the densification and mechanical properties of hydroxyapatite ceramic |
| title_full_unstemmed |
The effects of calcium-to-phosphorus ratio on the densification and mechanical properties of hydroxyapatite ceramic |
| title_sort |
effects of calcium-to-phosphorus ratio on the densification and mechanical properties of hydroxyapatite ceramic |
| publisher |
Blackwell Publishing Ltd |
| publishDate |
2023 |
| _version_ |
1806428167790919680 |
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13.211869 |