The effect of sintering ramp rate on the sinterability of forsterite ceramics
Document Type
Article
Publication Date
1-1-2014
Abstract
In the present work, pure forsterite (Mg2SiO4) powder was successfully synthesised via ball milling and subsequent heat treatment as an evident from X-ray diffraction analysis. The synthesised powder were formed by powder agglomerates that were made up of loosely packed fine particles. Then, the forsterite green bodies were sintered at 1200 and 1400 degrees C with two different ramp rates (2 and 10 degrees C per minute) via conventional pressureless sintering. No decomposition of forsterite phase was observed at both ramp rates. This study revealed that lower ramp rate (2 degrees C per minute) possessed minor improvement on the mechanical properties only at lower sintering temperature (1200 degrees C), whereas 10 degrees C per minute ramp rate gave a significant enhancement on the mechanical properties of forsterite at 1400 degrees C. A high fracture toughness of similar to 4.9 MPam(1/2) and Vickers hardness of similar to 7.1 GPa were obtained for forsterite samples sintered at 1400 degrees C with a ramp rate of 10 degrees C per minute.
Keywords
Forsterite, Sinterability, Ramp rate, Ball milling, Bioceramic
Publication Title
Materials Research Innovations
Volume
18
Issue
S6
Publisher
Maney Publishing
Publisher Location
STE 1C, JOSEPHS WELL, HANOVER WALK, LEEDS LS3 1AB, W YORKS, ENGLAND