Porous Hydoxyapatite-Zirconia Composites Prepared by powder Deposition and pressureless Sintering
Penulis/Author
EKO PUJIYANTO (1); Prof. Ir. Alva Edy Tontowi, M.Sc., Ph.D., IPU., ASEAN Eng. (2); Ir. M. Waziz Wildan, M.Sc., Ph.D., IPU (3); Prof. Dr. drg. Widowati Siswomihardjo, M.S. (4)
Tanggal/Date
2012
Kata Kunci/Keyword
Abstrak/Abstract
In the present study, hydroxyapatite was synthesized from local gypsum by microwave- hydrothermal method. Different percentage amounts of zirconia (0, 20, 30 and 40 wt.%) and poly- methyl methacrylate (40, 50 and 60 wt.%) mixed with hydroxyapatite (HA) for six hours. These powder mixture were deposited using deposition machine to produce specimens. These specimens were sintered at a temperature of 140 oC with holding time for 1 hour into the green parts. These green parts were sintered at temperature of 1450 oC with holding time for 2 hours. This process produces porous hydroxyapatite-zirconia composites with porosity between 62.76-73.92 percent. These composites were examined by XRD, XRF, SEM-EDX, BET analysis and compressive strength testing. Compressive strength of porous hidroxyapatite-zirconia composite decreased from 3.706 to 0.039 MPa when percentage amounts of zirconia increased up to 40 wt.%. This caused by several factors i.e. increased porosity, grain zirconia cracked, zirconia reacted with HA to produce CaZrO 3, ?-TCP and ?-TCP, HA matrix cracks because of the phase change of tetragonal-zirconia into monoclinic-zirconia.
Rumpun Ilmu
Teknik Mesin (dan Ilmu Permesinan Lain)
Bahasa Asli/Original Language
English
Level
Internasional
Status
Dokumen Karya
No
Judul
Tipe Dokumen
Aksi
1
Scimago Journal - Advanced Materials Research vol 445.pdf
Dokumen Pendukung Karya Ilmiah (Hibah, Publikasi, Penelitian, Pengabdian)
2
2012 - Porous HA-Zirconia - ADVANCED MATERIALS RESEARCH VOL 445 - FULL DOKUMEN.pdf
