Densification behavior of magnesium orthosilicate-hydroxyapatite composite

作者：Jeffrey C K L; Ramesh S^*; Tan C Y; Teng W D

来源：Journal of Ceramic Processing Research, 2016, 17(6): 620-625.

• Ceramic composite
• Hydroxyapatite-Magnesium Orthosilicate Composite
• Pressureless Sintering
• Mechanical Properties

The purpose of this work is to evaluate the densification behaviour of magnesium orthosilicate-hydroxyapatite (MO-HA) composite. The composite was prepared in various compositions, by varying the magnesium orthosilicate content from 10 wt% to 50 wt% via mechanical ball milling and conventional pressureless sintering at 1000 degrees C to 1300 degrees C, using a ramp rate of 10 degrees C/minute for 2 hrs. The study revealed that a secondary phase formation was found in all the sintered. In general, the MO-HA composites exhibited lower mechanical properties across all the composition investigated. However, a high fracture toughness of 2.5MPam(1/2) was recorded for hydroxyapatite containing 20 wt% magnesium orthosilicate addition which indicated the potential of this composite to be used for load bearing biomedical applications.

• 出版日期2016-7