About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
|
Symposium
|
Manufacturing and Processing of Advanced Ceramic Materials
|
Presentation Title |
Comparison of Microstructural Evolution of Hydroxyapatite Powder Sintered by Microwave, SPS and Conventional Sintering |
Author(s) |
Anne Leriche, Pierre Lefeuvre, Vedi Dupont, Diana Vitiello, Hamza Karouiti, Anthony Thuault, David Smith, Stéphane Hocquet |
On-Site Speaker (Planned) |
Anne Leriche |
Abstract Scope |
For recent years, new sintering techniques were developed such as microwave sintering, spark plasma sintering and cold sintering. Microwave sintering and SPS techniques can be used to sinter ceramics at a faster rate with reduced grain growth. The hypothesis backing this study is that this behavior difference might be explained by different mechanisms occurring at the first step of sintering. A two-step sintering process was applied to a sub-micrometer sized pure hydroxyapatite. The first step involved either conventional heat treatment, microwave or spark plasma techniques to achieve partially densified (~70% theoretical density) ceramics for microstructural analysis. Then in the second step the samples were fully densified by conventional sintering. Differences in grain size were observed after the first step of sintering and were maintained after the second sintering step leading to denser ceramics compared to those obtained by uniquely conventional sintering. |