Two-Step Sintering of Dense Nanostuctured Hydroxyapatite/Titania composite
عنوان مقاله: Two-Step Sintering of Dense Nanostuctured Hydroxyapatite/Titania composite
شناسه ملی مقاله: NAMIC01_071
منتشر شده در اولین کنفرانس بین المللی مواد پیشرفته در سال 1391
شناسه ملی مقاله: NAMIC01_071
منتشر شده در اولین کنفرانس بین المللی مواد پیشرفته در سال 1391
مشخصات نویسندگان مقاله:
Ali Farzin - Biomaterials Group, Department of Materials Engineering, Isfahan University of Technology, Isfahan, ۸۴۱۵۶۸۳۱۱۱, Iran
Mehdi Ahmadian
M.H Fathi
خلاصه مقاله:
Ali Farzin - Biomaterials Group, Department of Materials Engineering, Isfahan University of Technology, Isfahan, ۸۴۱۵۶۸۳۱۱۱, Iran
Mehdi Ahmadian
M.H Fathi
Two-step sintering (TSS) has been applied to suppress the accelerated grain growth of Hydroxyapatite (HA) and Titania (TiO2) nanoparticles in the HA-TiO2 composites in the last sintering stage. Application of this method showed that the final grain size of HA-15wt.%TiO2 is maintained lower than 100nm, while through conventional sintering it reaches higher than 100nm. To find how important the temperatures at sintering steps might be, several TSS regimes were conducted. The results showed that the temperatures were critical at both sintering stages. The optimum regime consisted of heating the green bodies up to 1150˚C in the first step of sintering and then holding at 1050˚C for about 25h in the second step. This yielded the finest microstructure with no exaggeration in grain growth. The specimens prepared by optimum TSS regime resulted in no pernicious α-TCP phase
کلمات کلیدی: Nano structured Composites , Two Step Sintering , Hydroxyapatite , Scanning Electron Microscopy
صفحه اختصاصی مقاله و دریافت فایل کامل: https://civilica.com/doc/151110/