Fabrication and mechanical properties of Al2O3/SiC/ZrO2 functionally graded material by electrophoretic deposition.
This study describes the synthesis of Al(2)O(3)/SiC/ZrO(2) functionally graded material (FGM) in bio-implants (artificial joints) by electrophoretic deposition (EPD). A suitable suspension that was based on 2-butanone was applied for the EPD of Al(2)O(3)/SiC/ZrO(2), and a pressureless sintering process was applied as a presintering. Hot isostatic pressing (HIP) was used to densify the deposit, with beneficial mechanical properties after 2 h at 1800 °C in Ar atmosphere. The maximum hardness in the outer layer (90 vol.% Al(2)O(3)+10 vol.% SiC) and maximum fracture toughness in the core layer (75 vol.% Al(2)O(3)+10 vol.% SiC + 15 vol.% ZrO(2)) composite were 20.8±0.3 GPa and 8±0.1 MPa m(1/2), respectively. The results, when compared with results from Al(2)O(3)/ZrO(2) FGM, showed that SiC increased the compressive stresses in the outer layers, while the inner layers were under a residual tensile stress.
Department of Mechanical Engineering and Advanced Material Research Center, University of Malaya, 50603, Kuala Lumpur, Malaysia.
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Askari
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Mehrali
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Kadri
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Rahman
D000537:Aluminum Oxide / Q000737:chemistry*; D001672:Biocompatible Materials / Q000737:chemistry*; D002074:Butanones / Q000737:chemistry; D017554:Carbon Compounds, Inorganic / Q000737:chemistry*; D019245:Compressive Strength; D004586:Electrophoresis / Q000379:methods*; D006244:Hardness; D006358:Hot Temperature; D007595:Joint Prosthesis; D008422:Materials Testing; D011208:Powders; D011474:Prosthesis Design; D017655:Silicon Compounds / Q000737:chemistry*; D013314:Stress, Mechanical; D013499:Surface Properties; D013696:Temperature; D013718:Tensile Strength; D014961:X-Ray Diffraction; D015040:Zirconium / Q000737:chemistry*
D001672:Biocompatible Materials; D002074:Butanones; D017554:Carbon Compounds, Inorganic; D011208:Powders; D017655:Silicon Compounds; C005222:methylethyl ketone; D015040:Zirconium; D000537:Aluminum Oxide; C028541:zirconium oxide; C022088:silicon carbide