Wear characterization of nano-hydroxyapatite with addition of titanium (HA-Ti)

International Conference on Materials Engineering and Applications

Rosmamuhamadani, R.^1 ; Arawi, A.Z.O.^1 ; Talari, M.K.^1 ; Mahat, M.M.^1 ; Bonnia, N.N.^1 ; Sabrina^2 ; Yahaya, M.^1 ; Sulaiman, S.^2 ; Ismail, M.I.S.^2

Materials Technology Program, School of Physics and Material Studies, Faculty of Applied Sciences, Universiti Teknologi MARA Selangor, Selangor, Shah Alam

40450, Malaysia^1

Mechanical and Manufacturing Department, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Selangor

43400, Malaysia^2

关键词: Ball milling process;    Calcium hydroxide (Ca2);    Chemical compositions;    Coefficient of frictions;    Crystallographic structure;    Diammonium phosphates;    Microstructure analysis;    Wear characterization;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/348/1/012001/pdf
DOI  :  10.1088/1757-899X/348/1/012001

来源: IOP

【 摘 要 】

Hydroxyapatite (Ca10(PO4)6(OH)2, HA), is an attractive material of an inorganic compound whose chemical composition and crystallographic structures are similar to the composition of the bone. A natural source such as egg shells is composed of 94 wt. % of calcium carbonate (CaCO3), which can be calcined as calcium oxide (CaO) by the calcinations process. The efficient temperature to produce CaO is 900 °C for 2 hours. The synthesis of nano-HA was done by the mixing the diammonium phosphate (DAP) and calcium hydroxide (Ca(OH)2) and subjected into a microwave for 30 minutes at 1100 W irradiation power. Ball milling process was used for 30 minutes to mix the nano-HA with different compositions of titanium. These were pressed to form pallets by hand hydraulic pump (force=2300 psi). The pallets then were sintered at 1200 °C with the heating rate of 3 °C/min for 2 hours. The pallets were tested by several mechanical testing including hardness, compression strength and wear. From the results, HA-25wt. %Ti composite gave the highest hardness, compression and coefficient of friction for wear test values which were 89.6 Hv, 82.5MPa and 0.76μ respectively. It showed that by adding Ti to nano-HA, the mechanical properties of nano-HA could be enhanced. The microstructure analyses by optical micrograph showed that nano-HA-Ti particles displayed shape likes needle morphology. The particles showed the high tendency to form the agglomerations.