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New technique for bonding hydroxyapatite ceramics and magnesium alloy by hydrothermal hot-pressing method |
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| Authors: | Takamasa Onoki Shin'ya Yamamoto Hiroshi Onodera Atsushi Nakahira |
| Affiliation: | 1. Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka, 599-8531, Japan;2. Tohoku University School of Medicine, 2-1 Seiryo-cho, Aoba-ku, Sendai, 980-8575, Japan;3. Osaka Center for Industrial Materials Research, Institute for Materials Research, Tohoku University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka, 599-8531, Japan |
| Abstract: | The solidification of hydroxyapatite (HA:Ca10(PO4)6(OH)2) and its bonding with Magnesium (Mg) alloys (AZ31; Mg–3Al–1Zn) were achieved simultaneously by using a hydrothermal hot-pressing method at a low temperature as low as 150 °C with no special surface treatment of Mg alloy. A mixture of calcium hydrogen phosphate dihydrate and calcium hydroxide was used as a starting powder material for solidifying HA. 3-point bending tests were conducted to obtain an estimate of the fracture toughness for the HA/Mg interface as well as for the HA ceramics only. The fracture toughness tests showed that the induced crack from the pre-crack tip deviated from the HA/Mg interface and propagated into the HA. The fracture toughness determined on the bonded HA/Mg specimen was close to that of the HA ceramics only (0.30 MPam1/2). |
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