[SIS5] MIM Challenges for New Materials

[15D-SIS5-04] Sinterability of Hydroxyapatite/Zirconia Micro-Parts Fabricated by Two-Component Micro-Powder Injection Molding Process

*N. Muhamad¹, A. Basir¹, A. B. Sulong¹, M. Mohamed Amin¹ (1.Universiti Kebangsaan Malaysia, Malaysia)

Keywords:HA/3YSZ micro-parts, Two-component micro-powder injection molding, Sintering

In the present study, we investigates the effect of the sintering temperature on the physical properties of bi-material micro-components of hydroxyapatite (HA) and 3 mol% yttria-stabilized zirconia (3YSZ) fabricated using a two-component micro-injection molding (2C-mPIM) technique. Firstly HA and 3YSZ powders were individually mixed with binders to prepare the feedstocks. Following micro-injection molding of the HA and 3YSZ feedstocks into the dumbbel shape, the debinding procedure was carried out. The debound samples were sintered at temperatures ranging from 1200 ^oC to 1400 ^oC. According to the field emmission scanning electron microscopy (FESEM) analysis of the microstructures, sintering resulted in the formation of a bonding between two different types of ceramic in micro-sized HA/3YSZ components. The highest relative density og 98% was acheived after sintering. The sintered HA/3YSZ micro-parts demonstrated a linear shringkage between 11% - 19% after the sintering process.