کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1475176 | 991110 | 2011 | 8 صفحه PDF | دانلود رایگان |
High-density and fine-grained transparent hydroxyapatite (Ca10(PO4)6(OH)2: HAp) ceramics with B2O3 and Na2O addition were fabricated using pressureless sintering and pulse-current pressure sintering between 1000 and 1100 °C; the superplastic deformation of these HAp specimens was evaluated. The relative density of pure HAp compacts pulse-current pressure sintered at 1000 °C for 10 min under a pressure of 50 MPa attained 99.9% and exhibited translucency. The tensile elongation of the pure HAp specimen, which was measured at 1000 °C under a strain rate of 1.48 × 10−4 s−1, was as high as 364%. The relative density of HAp compacts with 3.0 mol.% B2O3 addition pulse-current pressure sintered under the same conditions as those of pure HAp compacts was 98.9%, whereas the grain size was as low as 0.24 μm. The elongation of HAp specimens, measured at a test temperature of 1000 °C under a strain rate of 1.48 × 10−4 s−1, was as high as 578%.
Journal: Journal of the European Ceramic Society - Volume 31, Issue 14, November 2011, Pages 2641–2648